530 files changed, 32998 insertions, 0 deletions

diff --git a/vendor/twig/extensions b/vendor/twig/extensions
new file mode 160000
+Subproject f5b0c84f3699e494c84ee627d7d583e115d2c4a
diff --git a/vendor/twig/twig/.editorconfig b/vendor/twig/twig/.editorconfig
new file mode 100644
index 00000000..270f1d1b
--- /dev/null
+++ b/vendor/twig/twig/.editorconfig
@@ -0,0 +1,18 @@
+; top-most EditorConfig file
+root = true
+
+; Unix-style newlines
+[*]
+end_of_line = LF
+
+[*.php]
+indent_style = space
+indent_size = 4
+
+[*.test]
+indent_style = space
+indent_size = 4
+
+[*.rst]
+indent_style = space
+indent_size = 4
diff --git a/vendor/twig/twig/.gitignore b/vendor/twig/twig/.gitignore
new file mode 100644
index 00000000..840b78e7
--- /dev/null
+++ b/vendor/twig/twig/.gitignore
@@ -0,0 +1,2 @@
+/ext/twig/autom4te.cache/
+
diff --git a/vendor/twig/twig/.travis.yml b/vendor/twig/twig/.travis.yml
new file mode 100644
index 00000000..8569a395
--- /dev/null
+++ b/vendor/twig/twig/.travis.yml
@@ -0,0 +1,15 @@
+language: php
+
+php:
+  - 5.2
+  - 5.3
+  - 5.4
+  - 5.5
+
+env:
+  - TWIG_EXT=no
+  - TWIG_EXT=yes
+
+before_script:
+  - if [ "$TWIG_EXT" == "yes" ]; then sh -c "cd ext/twig && phpize && ./configure --enable-twig && make && sudo make install"; fi
+  - if [ "$TWIG_EXT" == "yes" ]; then echo "extension=twig.so" >> `php --ini | grep "Loaded Configuration" | sed -e "s|.*:\s*||"`; fi
diff --git a/vendor/twig/twig/AUTHORS b/vendor/twig/twig/AUTHORS
new file mode 100644
index 00000000..eb5db051
--- /dev/null
+++ b/vendor/twig/twig/AUTHORS
@@ -0,0 +1,9 @@
+Twig is written and maintained by the Twig Team:
+
+Lead Developer:
+
+- Fabien Potencier <fabien.potencier@symfony-project.org>
+
+Project Founder:
+
+- Armin Ronacher <armin.ronacher@active-4.com>
diff --git a/vendor/twig/twig/CHANGELOG b/vendor/twig/twig/CHANGELOG
new file mode 100644
index 00000000..80ff9d2d
--- /dev/null
+++ b/vendor/twig/twig/CHANGELOG
@@ -0,0 +1,637 @@
+* 1.13.2 (2013-08-03)
+
+ * fixed the error line number for an error occurs in and embedded template
+ * fixed crashes of the C extension on some edge cases
+
+* 1.13.1 (2013-06-06)
+
+ * added the possibility to ignore the filesystem constructor argument in Twig_Loader_Filesystem
+ * fixed Twig_Loader_Chain::exists() for a loader which implements Twig_ExistsLoaderInterface
+ * adjusted backtrace call to reduce memory usage when an error occurs
+ * added support for object instances as the second argument of the constant test
+ * fixed the include function when used in an assignment
+
+* 1.13.0 (2013-05-10)
+
+ * fixed getting a numeric-like item on a variable ('09' for instance)
+ * fixed getting a boolean or float key on an array, so it is consistent with PHP's array access:
+   `{{ array[false] }}` behaves the same as `echo $array[false];` (equals `$array[0]`)
+ * made the escape filter 20% faster for happy path (escaping string for html with UTF-8)
+ * changed ☃ to § in tests
+ * enforced usage of named arguments after positional ones
+
+* 1.12.3 (2013-04-08)
+
+ * fixed a security issue in the filesystem loader where it was possible to include a template one
+   level above the configured path
+ * fixed fatal error that should be an exception when adding a filter/function/test too late
+ * added a batch filter
+ * added support for encoding an array as query string in the url_encode filter
+
+* 1.12.2 (2013-02-09)
+
+ * fixed the timezone used by the date filter and function when the given date contains a timezone (like 2010-01-28T15:00:00+02:00)
+ * fixed globals when getGlobals is called early on
+ * added the first and last filter
+
+* 1.12.1 (2013-01-15)
+
+ * added support for object instances as the second argument of the constant function
+ * relaxed globals management to avoid a BC break
+ * added support for {{ some_string[:2] }}
+
+* 1.12.0 (2013-01-08)
+
+ * added verbatim as an alias for the raw tag to avoid confusion with the raw filter
+ * fixed registration of tests and functions as anonymous functions
+ * fixed globals management
+
+* 1.12.0-RC1 (2012-12-29)
+
+ * added an include function (does the same as the include tag but in a more flexible way)
+ * added the ability to use any PHP callable to define filters, functions, and tests
+ * added a syntax error when using a loop variable that is not defined
+ * added the ability to set default values for macro arguments
+ * added support for named arguments for filters, tests, and functions
+ * moved filters/functions/tests syntax errors to the parser
+ * added support for extended ternary operator syntaxes
+
+* 1.11.1 (2012-11-11)
+
+ * fixed debug info line numbering (was off by 2)
+ * fixed escaping when calling a macro inside another one (regression introduced in 1.9.1)
+ * optimized variable access on PHP 5.4
+ * fixed a crash of the C extension when an exception was thrown from a macro called without being imported (using _self.XXX)
+
+* 1.11.0 (2012-11-07)
+
+ * fixed macro compilation when a variable name is a PHP reserved keyword
+ * changed the date filter behavior to always apply the default timezone, except if false is passed as the timezone
+ * fixed bitwise operator precedences
+ * added the template_from_string function
+ * fixed default timezone usage for the date function
+ * optimized the way Twig exceptions are managed (to make them faster)
+ * added Twig_ExistsLoaderInterface (implementing this interface in your loader make the chain loader much faster)
+
+* 1.10.3 (2012-10-19)
+
+ * fixed wrong template location in some error messages
+ * reverted a BC break introduced in 1.10.2
+ * added a split filter
+
+* 1.10.2 (2012-10-15)
+
+ * fixed macro calls on PHP 5.4
+
+* 1.10.1 (2012-10-15)
+
+ * made a speed optimization to macro calls when imported via the "import" tag
+ * fixed C extension compilation on Windows
+ * fixed a segfault in the C extension when using DateTime objects
+
+* 1.10.0 (2012-09-28)
+
+ * extracted functional tests framework to make it reusable for third-party extensions
+ * added namespaced templates support in Twig_Loader_Filesystem
+ * added Twig_Loader_Filesystem::prependPath()
+ * fixed an error when a token parser pass a closure as a test to the subparse() method
+
+* 1.9.2 (2012-08-25)
+
+ * fixed the in operator for objects that contain circular references
+ * fixed the C extension when accessing a public property of an object implementing the \ArrayAccess interface
+
+* 1.9.1 (2012-07-22)
+
+ * optimized macro calls when auto-escaping is on
+ * fixed wrong parent class for Twig_Function_Node
+ * made Twig_Loader_Chain more explicit about problems
+
+* 1.9.0 (2012-07-13)
+
+ * made the parsing independent of the template loaders
+ * fixed exception trace when an error occurs when rendering a child template
+ * added escaping strategies for CSS, URL, and HTML attributes
+ * fixed nested embed tag calls
+ * added the date_modify filter
+
+* 1.8.3 (2012-06-17)
+
+ * fixed paths in the filesystem loader when passing a path that ends with a slash or a backslash
+ * fixed escaping when a project defines a function named html or js
+ * fixed chmod mode to apply the umask correctly
+
+* 1.8.2 (2012-05-30)
+
+ * added the abs filter
+ * fixed a regression when using a number in template attributes
+ * fixed compiler when mbstring.func_overload is set to 2
+ * fixed DateTimeZone support in date filter
+
+* 1.8.1 (2012-05-17)
+
+ * fixed a regression when dealing with SimpleXMLElement instances in templates
+ * fixed "is_safe" value for the "dump" function when "html_errors" is not defined in php.ini
+ * switched to use mbstring whenever possible instead of iconv (you might need to update your encoding as mbstring and iconv encoding names sometimes differ)
+
+* 1.8.0 (2012-05-08)
+
+ * enforced interface when adding tests, filters, functions, and node visitors from extensions
+ * fixed a side-effect of the date filter where the timezone might be changed
+ * simplified usage of the autoescape tag; the only (optional) argument is now the escaping strategy or false (with a BC layer)
+ * added a way to dynamically change the auto-escaping strategy according to the template "filename"
+ * changed the autoescape option to also accept a supported escaping strategy (for BC, true is equivalent to html)
+ * added an embed tag
+
+* 1.7.0 (2012-04-24)
+
+ * fixed a PHP warning when using CIFS
+ * fixed template line number in some exceptions
+ * added an iterable test
+ * added an error when defining two blocks with the same name in a template
+ * added the preserves_safety option for filters
+ * fixed a PHP notice when trying to access a key on a non-object/array variable
+ * enhanced error reporting when the template file is an instance of SplFileInfo
+ * added Twig_Environment::mergeGlobals()
+ * added compilation checks to avoid misuses of the sandbox tag
+ * fixed filesystem loader freshness logic for high traffic websites
+ * fixed random function when charset is null
+
+* 1.6.5 (2012-04-11)
+
+ * fixed a regression when a template only extends another one without defining any blocks
+
+* 1.6.4 (2012-04-02)
+
+ * fixed PHP notice in Twig_Error::guessTemplateLine() introduced in 1.6.3
+ * fixed performance when compiling large files
+ * optimized parent template creation when the template does not use dynamic inheritance
+
+* 1.6.3 (2012-03-22)
+
+ * fixed usage of Z_ADDREF_P for PHP 5.2 in the C extension
+ * fixed compilation of numeric values used in templates when using a locale where the decimal separator is not a dot
+ * made the strategy used to guess the real template file name and line number in exception messages much faster and more accurate
+
+* 1.6.2 (2012-03-18)
+
+ * fixed sandbox mode when used with inheritance
+ * added preserveKeys support for the slice filter
+ * fixed the date filter when a DateTime instance is passed with a specific timezone
+ * added a trim filter
+
+* 1.6.1 (2012-02-29)
+
+ * fixed Twig C extension
+ * removed the creation of Twig_Markup instances when not needed
+ * added a way to set the default global timezone for dates
+ * fixed the slice filter on strings when the length is not specified
+ * fixed the creation of the cache directory in case of a race condition
+
+* 1.6.0 (2012-02-04)
+
+ * fixed raw blocks when used with the whitespace trim option
+ * made a speed optimization to macro calls when imported via the "from" tag
+ * fixed globals, parsers, visitors, filters, tests, and functions management in Twig_Environment when a new one or new extension is added
+ * fixed the attribute function when passing arguments
+ * added slice notation support for the [] operator (syntactic sugar for the slice operator)
+ * added a slice filter
+ * added string support for the reverse filter
+ * fixed the empty test and the length filter for Twig_Markup instances
+ * added a date function to ease date comparison
+ * fixed unary operators precedence
+ * added recursive parsing support in the parser
+ * added string and integer handling for the random function
+
+* 1.5.1 (2012-01-05)
+
+ * fixed a regression when parsing strings
+
+* 1.5.0 (2012-01-04)
+
+ * added Traversable objects support for the join filter
+
+* 1.5.0-RC2 (2011-12-30)
+
+ * added a way to set the default global date interval format
+ * fixed the date filter for DateInterval instances (setTimezone() does not exist for them)
+ * refactored Twig_Template::display() to ease its extension
+ * added a number_format filter
+
+* 1.5.0-RC1 (2011-12-26)
+
+ * removed the need to quote hash keys
+ * allowed hash keys to be any expression
+ * added a do tag
+ * added a flush tag
+ * added support for dynamically named filters and functions
+ * added a dump function to help debugging templates
+ * added a nl2br filter
+ * added a random function
+ * added a way to change the default format for the date filter
+ * fixed the lexer when an operator ending with a letter ends a line
+ * added string interpolation support
+ * enhanced exceptions for unknown filters, functions, tests, and tags
+
+* 1.4.0 (2011-12-07)
+
+ * fixed lexer when using big numbers (> PHP_INT_MAX)
+ * added missing preserveKeys argument to the reverse filter
+ * fixed macros containing filter tag calls
+
+* 1.4.0-RC2 (2011-11-27)
+
+ * removed usage of Reflection in Twig_Template::getAttribute()
+ * added a C extension that can optionally replace Twig_Template::getAttribute()
+ * added negative timestamp support to the date filter
+
+* 1.4.0-RC1 (2011-11-20)
+
+ * optimized variable access when using PHP 5.4
+ * changed the precedence of the .. operator to be more consistent with languages that implements such a feature like Ruby
+ * added an Exception to Twig_Loader_Array::isFresh() method when the template does not exist to be consistent with other loaders
+ * added Twig_Function_Node to allow more complex functions to have their own Node class
+ * added Twig_Filter_Node to allow more complex filters to have their own Node class
+ * added Twig_Test_Node to allow more complex tests to have their own Node class
+ * added a better error message when a template is empty but contain a BOM
+ * fixed "in" operator for empty strings
+ * fixed the "defined" test and the "default" filter (now works with more than one call (foo.bar.foo) and for both values of the strict_variables option)
+ * changed the way extensions are loaded (addFilter/addFunction/addGlobal/addTest/addNodeVisitor/addTokenParser/addExtension can now be called in any order)
+ * added Twig_Environment::display()
+ * made the escape filter smarter when the encoding is not supported by PHP
+ * added a convert_encoding filter
+ * moved all node manipulations outside the compile() Node method
+ * made several speed optimizations
+
+* 1.3.0 (2011-10-08)
+
+no changes
+
+* 1.3.0-RC1 (2011-10-04)
+
+ * added an optimization for the parent() function
+ * added cache reloading when auto_reload is true and an extension has been modified
+ * added the possibility to force the escaping of a string already marked as safe (instance of Twig_Markup)
+ * allowed empty templates to be used as traits
+ * added traits support for the "parent" function
+
+* 1.2.0 (2011-09-13)
+
+no changes
+
+* 1.2.0-RC1 (2011-09-10)
+
+ * enhanced the exception when a tag remains unclosed
+ * added support for empty Countable objects for the "empty" test
+ * fixed algorithm that determines if a template using inheritance is valid (no output between block definitions)
+ * added better support for encoding problems when escaping a string (available as of PHP 5.4)
+ * added a way to ignore a missing template when using the "include" tag ({% include "foo" ignore missing %})
+ * added support for an array of templates to the "include" and "extends" tags ({% include ['foo', 'bar'] %})
+ * added support for bitwise operators in expressions
+ * added the "attribute" function to allow getting dynamic attributes on variables
+ * added Twig_Loader_Chain
+ * added Twig_Loader_Array::setTemplate()
+ * added an optimization for the set tag when used to capture a large chunk of static text
+ * changed name regex to match PHP one "[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*" (works for blocks, tags, functions, filters, and macros)
+ * removed the possibility to use the "extends" tag from a block
+ * added "if" modifier support to "for" loops
+
+* 1.1.2 (2011-07-30)
+
+ * fixed json_encode filter on PHP 5.2
+ * fixed regression introduced in 1.1.1 ({{ block(foo|lower) }})
+ * fixed inheritance when using conditional parents
+ * fixed compilation of templates when the body of a child template is not empty
+ * fixed output when a macro throws an exception
+ * fixed a parsing problem when a large chunk of text is enclosed in a comment tag
+ * added PHPDoc for all Token parsers and Core extension functions
+
+* 1.1.1 (2011-07-17)
+
+ * added a performance optimization in the Optimizer (also helps to lower the number of nested level calls)
+ * made some performance improvement for some edge cases
+
+* 1.1.0 (2011-06-28)
+
+ * fixed json_encode filter
+
+* 1.1.0-RC3 (2011-06-24)
+
+ * fixed method case-sensitivity when using the sandbox mode
+ * added timezone support for the date filter
+ * fixed possible security problems with NUL bytes
+
+* 1.1.0-RC2 (2011-06-16)
+
+ * added an exception when the template passed to "use" is not a string
+ * made 'a.b is defined' not throw an exception if a is not defined (in strict mode)
+ * added {% line \d+ %} directive
+
+* 1.1.0-RC1 (2011-05-28)
+
+Flush your cache after upgrading.
+
+ * fixed date filter when using a timestamp
+ * fixed the defined test for some cases
+ * fixed a parsing problem when a large chunk of text is enclosed in a raw tag
+ * added support for horizontal reuse of template blocks (see docs for more information)
+ * added whitespace control modifier to all tags (see docs for more information)
+ * added null as an alias for none (the null test is also an alias for the none test now)
+ * made TRUE, FALSE, NONE equivalent to their lowercase counterparts
+ * wrapped all compilation and runtime exceptions with Twig_Error_Runtime and added logic to guess the template name and line
+ * moved display() method to Twig_Template (generated templates should now use doDisplay() instead)
+
+* 1.0.0 (2011-03-27)
+
+ * fixed output when using mbstring
+ * fixed duplicate call of methods when using the sandbox
+ * made the charset configurable for the escape filter
+
+* 1.0.0-RC2 (2011-02-21)
+
+ * changed the way {% set %} works when capturing (the content is now marked as safe)
+ * added support for macro name in the endmacro tag
+ * make Twig_Error compatible with PHP 5.3.0 >
+ * fixed an infinite loop on some Windows configurations
+ * fixed the "length" filter for numbers
+ * fixed Template::getAttribute() as properties in PHP are case sensitive
+ * removed coupling between Twig_Node and Twig_Template
+ * fixed the ternary operator precedence rule
+
+* 1.0.0-RC1 (2011-01-09)
+
+Backward incompatibilities:
+
+ * the "items" filter, which has been deprecated for quite a long time now, has been removed
+ * the "range" filter has been converted to a function: 0|range(10) -> range(0, 10)
+ * the "constant" filter has been converted to a function: {{ some_date|date('DATE_W3C'|constant) }} -> {{ some_date|date(constant('DATE_W3C')) }}
+ * the "cycle" filter has been converted to a function: {{ ['odd', 'even']|cycle(i) }} -> {{ cycle(['odd', 'even'], i) }}
+ * the "for" tag does not support "joined by" anymore
+ * the "autoescape" first argument is now "true"/"false" (instead of "on"/"off")
+ * the "parent" tag has been replaced by a "parent" function ({{ parent() }} instead of {% parent %})
+ * the "display" tag has been replaced by a "block" function ({{ block('title') }} instead of {% display title %})
+ * removed the grammar and simple token parser (moved to the Twig Extensions repository)
+
+Changes:
+
+ * added "needs_context" option for filters and functions (the context is then passed as a first argument)
+ * added global variables support
+ * made macros return their value instead of echoing directly (fixes calling a macro in sandbox mode)
+ * added the "from" tag to import macros as functions
+ * added support for functions (a function is just syntactic sugar for a getAttribute() call)
+ * made macros callable when sandbox mode is enabled
+ * added an exception when a macro uses a reserved name
+ * the "default" filter now uses the "empty" test instead of just checking for null
+ * added the "empty" test
+
+* 0.9.10 (2010-12-16)
+
+Backward incompatibilities:
+
+ * The Escaper extension is enabled by default, which means that all displayed
+   variables are now automatically escaped. You can revert to the previous
+   behavior by removing the extension via $env->removeExtension('escaper')
+   or just set the 'autoescape' option to 'false'.
+ * removed the "without loop" attribute for the "for" tag (not needed anymore
+   as the Optimizer take care of that for most cases)
+ * arrays and hashes have now a different syntax
+     * arrays keep the same syntax with square brackets: [1, 2]
+     * hashes now use curly braces (["a": "b"] should now be written as {"a": "b"})
+     * support for "arrays with keys" and "hashes without keys" is not supported anymore ([1, "foo": "bar"] or {"foo": "bar", 1})
+ * the i18n extension is now part of the Twig Extensions repository
+
+Changes:
+
+ * added the merge filter
+ * removed 'is_escaper' option for filters (a left over from the previous version) -- you must use 'is_safe' now instead
+ * fixed usage of operators as method names (like is, in, and not)
+ * changed the order of execution for node visitors
+ * fixed default() filter behavior when used with strict_variables set to on
+ * fixed filesystem loader compatibility with PHAR files
+ * enhanced error messages when an unexpected token is parsed in an expression
+ * fixed filename not being added to syntax error messages
+ * added the autoescape option to enable/disable autoescaping
+ * removed the newline after a comment (mimics PHP behavior)
+ * added a syntax error exception when parent block is used on a template that does not extend another one
+ * made the Escaper extension enabled by default
+ * fixed sandbox extension when used with auto output escaping
+ * fixed escaper when wrapping a Twig_Node_Print (the original class must be preserved)
+ * added an Optimizer extension (enabled by default; optimizes "for" loops and "raw" filters)
+ * added priority to node visitors
+
+* 0.9.9 (2010-11-28)
+
+Backward incompatibilities:
+ * the self special variable has been renamed to _self
+ * the odd and even filters are now tests:
+     {{ foo|odd }} must now be written {{ foo is odd }}
+ * the "safe" filter has been renamed to "raw"
+ * in Node classes,
+        sub-nodes are now accessed via getNode() (instead of property access)
+        attributes via getAttribute() (instead of array access)
+ * the urlencode filter had been renamed to url_encode
+ * the include tag now merges the passed variables with the current context by default
+   (the old behavior is still possible by adding the "only" keyword)
+ * moved Exceptions to Twig_Error_* (Twig_SyntaxError/Twig_RuntimeError are now Twig_Error_Syntax/Twig_Error_Runtime)
+ * removed support for {{ 1 < i < 3 }} (use {{ i > 1 and i < 3 }} instead)
+ * the "in" filter has been removed ({{ a|in(b) }} should now be written {{ a in b }})
+
+Changes:
+ * added file and line to Twig_Error_Runtime exceptions thrown from Twig_Template
+ * changed trans tag to accept any variable for the plural count
+ * fixed sandbox mode (__toString() method check was not enforced if called implicitly from complex statements)
+ * added the ** (power) operator
+ * changed the algorithm used for parsing expressions
+ * added the spaceless tag
+ * removed trim_blocks option
+ * added support for is*() methods for attributes (foo.bar now looks for foo->getBar() or foo->isBar())
+ * changed all exceptions to extend Twig_Error
+ * fixed unary expressions ({{ not(1 or 0) }})
+ * fixed child templates (with an extend tag) that uses one or more imports
+ * added support for {{ 1 not in [2, 3] }} (more readable than the current {{ not (1 in [2, 3]) }})
+ * escaping has been rewritten
+ * the implementation of template inheritance has been rewritten
+   (blocks can now be called individually and still work with inheritance)
+ * fixed error handling for if tag when a syntax error occurs within a subparse process
+ * added a way to implement custom logic for resolving token parsers given a tag name
+ * fixed js escaper to be stricter (now uses a whilelist-based js escaper)
+ * added the following filers: "constant", "trans", "replace", "json_encode"
+ * added a "constant" test
+ * fixed objects with __toString() not being autoescaped
+ * fixed subscript expressions when calling __call() (methods now keep the case)
+ * added "test" feature (accessible via the "is" operator)
+ * removed the debug tag (should be done in an extension)
+ * fixed trans tag when no vars are used in plural form
+ * fixed race condition when writing template cache
+ * added the special _charset variable to reference the current charset
+ * added the special _context variable to reference the current context
+ * renamed self to _self (to avoid conflict)
+ * fixed Twig_Template::getAttribute() for protected properties
+
+* 0.9.8 (2010-06-28)
+
+Backward incompatibilities:
+ * the trans tag plural count is now attached to the plural tag:
+    old: `{% trans count %}...{% plural %}...{% endtrans %}`
+    new: `{% trans %}...{% plural count %}...{% endtrans %}`
+
+ * added a way to translate strings coming from a variable ({% trans var %})
+ * fixed trans tag when used with the Escaper extension
+ * fixed default cache umask
+ * removed Twig_Template instances from the debug tag output
+ * fixed objects with __isset() defined
+ * fixed set tag when used with a capture
+ * fixed type hinting for Twig_Environment::addFilter() method
+
+* 0.9.7 (2010-06-12)
+
+Backward incompatibilities:
+ * changed 'as' to '=' for the set tag ({% set title as "Title" %} must now be {% set title = "Title" %})
+ * removed the sandboxed attribute of the include tag (use the new sandbox tag instead)
+ * refactored the Node system (if you have custom nodes, you will have to update them to use the new API)
+
+ * added self as a special variable that refers to the current template (useful for importing macros from the current template)
+ * added Twig_Template instance support to the include tag
+ * added support for dynamic and conditional inheritance ({% extends some_var %} and {% extends standalone ? "minimum" : "base" %})
+ * added a grammar sub-framework to ease the creation of custom tags
+ * fixed the for tag for large arrays (some loop variables are now only available for arrays and objects that implement the Countable interface)
+ * removed the Twig_Resource::resolveMissingFilter() method
+ * fixed the filter tag which did not apply filtering to included files
+ * added a bunch of unit tests
+ * added a bunch of phpdoc
+ * added a sandbox tag in the sandbox extension
+ * changed the date filter to support any date format supported by DateTime
+ * added strict_variable setting to throw an exception when an invalid variable is used in a template (disabled by default)
+ * added the lexer, parser, and compiler as arguments to the Twig_Environment constructor
+ * changed the cache option to only accepts an explicit path to a cache directory or false
+ * added a way to add token parsers, filters, and visitors without creating an extension
+ * added three interfaces: Twig_NodeInterface, Twig_TokenParserInterface, and Twig_FilterInterface
+ * changed the generated code to match the new coding standards
+ * fixed sandbox mode (__toString() method check was not enforced if called implicitly from a simple statement like {{ article }})
+ * added an exception when a child template has a non-empty body (as it is always ignored when rendering)
+
+* 0.9.6 (2010-05-12)
+
+ * fixed variables defined outside a loop and for which the value changes in a for loop
+ * fixed the test suite for PHP 5.2 and older versions of PHPUnit
+ * added support for __call() in expression resolution
+ * fixed node visiting for macros (macros are now visited by visitors as any other node)
+ * fixed nested block definitions with a parent call (rarely useful but nonetheless supported now)
+ * added the cycle filter
+ * fixed the Lexer when mbstring.func_overload is used with an mbstring.internal_encoding different from ASCII
+ * added a long-syntax for the set tag ({% set foo %}...{% endset %})
+ * unit tests are now powered by PHPUnit
+ * added support for gettext via the `i18n` extension
+ * fixed twig_capitalize_string_filter() and fixed twig_length_filter() when used with UTF-8 values
+ * added a more useful exception if an if tag is not closed properly
+ * added support for escaping strategy in the autoescape tag
+ * fixed lexer when a template has a big chunk of text between/in a block
+
+* 0.9.5 (2010-01-20)
+
+As for any new release, don't forget to remove all cached templates after
+upgrading.
+
+If you have defined custom filters, you MUST upgrade them for this release. To
+upgrade, replace "array" with "new Twig_Filter_Function", and replace the
+environment constant by the "needs_environment" option:
+
+  // before
+  'even'   => array('twig_is_even_filter', false),
+  'escape' => array('twig_escape_filter', true),
+
+  // after
+  'even'   => new Twig_Filter_Function('twig_is_even_filter'),
+  'escape' => new Twig_Filter_Function('twig_escape_filter', array('needs_environment' => true)),
+
+If you have created NodeTransformer classes, you will need to upgrade them to
+the new interface (please note that the interface is not yet considered
+stable).
+
+ * fixed list nodes that did not extend the Twig_NodeListInterface
+ * added the "without loop" option to the for tag (it disables the generation of the loop variable)
+ * refactored node transformers to node visitors
+ * fixed automatic-escaping for blocks
+ * added a way to specify variables to pass to an included template
+ * changed the automatic-escaping rules to be more sensible and more configurable in custom filters (the documentation lists all the rules)
+ * improved the filter system to allow object methods to be used as filters
+ * changed the Array and String loaders to actually make use of the cache mechanism
+ * included the default filter function definitions in the extension class files directly (Core, Escaper)
+ * added the // operator (like the floor() PHP function)
+ * added the .. operator (as a syntactic sugar for the range filter when the step is 1)
+ * added the in operator (as a syntactic sugar for the in filter)
+ * added the following filters in the Core extension: in, range
+ * added support for arrays (same behavior as in PHP, a mix between lists and dictionaries, arrays and hashes)
+ * enhanced some error messages to provide better feedback in case of parsing errors
+
+* 0.9.4 (2009-12-02)
+
+If you have custom loaders, you MUST upgrade them for this release: The
+Twig_Loader base class has been removed, and the Twig_LoaderInterface has also
+been changed (see the source code for more information or the documentation).
+
+ * added support for DateTime instances for the date filter
+ * fixed loop.last when the array only has one item
+ * made it possible to insert newlines in tag and variable blocks
+ * fixed a bug when a literal '\n' were present in a template text
+ * fixed bug when the filename of a template contains */
+ * refactored loaders
+
+* 0.9.3 (2009-11-11)
+
+This release is NOT backward compatible with the previous releases.
+
+  The loaders do not take the cache and autoReload arguments anymore. Instead,
+  the Twig_Environment class has two new options: cache and auto_reload.
+  Upgrading your code means changing this kind of code:
+
+      $loader = new Twig_Loader_Filesystem('/path/to/templates', '/path/to/compilation_cache', true);
+      $twig = new Twig_Environment($loader);
+
+  to something like this:
+
+      $loader = new Twig_Loader_Filesystem('/path/to/templates');
+      $twig = new Twig_Environment($loader, array(
+        'cache' => '/path/to/compilation_cache',
+        'auto_reload' => true,
+      ));
+
+ * deprecated the "items" filter as it is not needed anymore
+ * made cache and auto_reload options of Twig_Environment instead of arguments of Twig_Loader
+ * optimized template loading speed
+ * removed output when an error occurs in a template and render() is used
+ * made major speed improvements for loops (up to 300% on even the smallest loops)
+ * added properties as part of the sandbox mode
+ * added public properties support (obj.item can now be the item property on the obj object)
+ * extended set tag to support expression as value ({% set foo as 'foo' ~ 'bar' %} )
+ * fixed bug when \ was used in HTML
+
+* 0.9.2 (2009-10-29)
+
+ * made some speed optimizations
+ * changed the cache extension to .php
+ * added a js escaping strategy
+ * added support for short block tag
+ * changed the filter tag to allow chained filters
+ * made lexer more flexible as you can now change the default delimiters
+ * added set tag
+ * changed default directory permission when cache dir does not exist (more secure)
+ * added macro support
+ * changed filters first optional argument to be a Twig_Environment instance instead of a Twig_Template instance
+ * made Twig_Autoloader::autoload() a static method
+ * avoid writing template file if an error occurs
+ * added $ escaping when outputting raw strings
+ * enhanced some error messages to ease debugging
+ * fixed empty cache files when the template contains an error
+
+* 0.9.1 (2009-10-14)
+
+  * fixed a bug in PHP 5.2.6
+  * fixed numbers with one than one decimal
+  * added support for method calls with arguments ({{ foo.bar('a', 43) }})
+  * made small speed optimizations
+  * made minor tweaks to allow better extensibility and flexibility
+
+* 0.9.0 (2009-10-12)
+
+ * Initial release
diff --git a/vendor/twig/twig/LICENSE b/vendor/twig/twig/LICENSE
new file mode 100644
index 00000000..3384cc55
--- /dev/null
+++ b/vendor/twig/twig/LICENSE
@@ -0,0 +1,31 @@
+Copyright (c) 2009-2013 by the Twig Team, see AUTHORS for more details.
+
+Some rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * The names of the contributors may not be used to endorse or
+      promote products derived from this software without specific
+      prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/twig/twig/README.markdown b/vendor/twig/twig/README.markdown
new file mode 100644
index 00000000..88d6fabc
--- /dev/null
+++ b/vendor/twig/twig/README.markdown
@@ -0,0 +1,17 @@
+Twig, the flexible, fast, and secure template language for PHP
+==============================================================
+
+[![Build Status](https://secure.travis-ci.org/fabpot/Twig.png?branch=master)](http://travis-ci.org/fabpot/Twig)
+
+Twig is a template language for PHP, released under the new BSD license (code
+and documentation).
+
+Twig uses a syntax similar to the Django and Jinja template languages which
+inspired the Twig runtime environment.
+
+More Information
+----------------
+
+Read the [documentation][1] for more information.
+
+[1]: http://twig.sensiolabs.org/documentation
diff --git a/vendor/twig/twig/composer.json b/vendor/twig/twig/composer.json
new file mode 100644
index 00000000..67a08aad
--- /dev/null
+++ b/vendor/twig/twig/composer.json
@@ -0,0 +1,31 @@
+{
+    "name": "twig/twig",
+    "type": "library",
+    "description": "Twig, the flexible, fast, and secure template language for PHP",
+    "keywords": ["templating"],
+    "homepage": "http://twig.sensiolabs.org",
+    "license": "BSD-3-Clause",
+    "authors": [
+        {
+            "name": "Fabien Potencier",
+            "email": "fabien@symfony.com"
+        },
+        {
+            "name": "Armin Ronacher",
+            "email": "armin.ronacher@active-4.com"
+        }
+    ],
+    "require": {
+        "php": ">=5.2.4"
+    },
+    "autoload": {
+        "psr-0" : {
+            "Twig_" : "lib/"
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.13-dev"
+        }
+    }
+}
diff --git a/vendor/twig/twig/doc/advanced.rst b/vendor/twig/twig/doc/advanced.rst
new file mode 100644
index 00000000..e1945ebb
--- /dev/null
+++ b/vendor/twig/twig/doc/advanced.rst
@@ -0,0 +1,829 @@
+Extending Twig
+==============
+
+.. caution::
+
+    This section describes how to extend Twig as of **Twig 1.12**. If you are
+    using an older version, read the :doc:`legacy<advanced_legacy>` chapter
+    instead.
+
+Twig can be extended in many ways; you can add extra tags, filters, tests,
+operators, global variables, and functions. You can even extend the parser
+itself with node visitors.
+
+.. note::
+
+    The first section of this chapter describes how to extend Twig easily. If
+    you want to reuse your changes in different projects or if you want to
+    share them with others, you should then create an extension as described
+    in the following section.
+
+.. caution::
+
+    When extending Twig without creating an extension, Twig won't be able to
+    recompile your templates when the PHP code is updated. To see your changes
+    in real-time, either disable template caching or package your code into an
+    extension (see the next section of this chapter).
+
+Before extending Twig, you must understand the differences between all the
+different possible extension points and when to use them.
+
+First, remember that Twig has two main language constructs:
+
+* ``{{ }}``: used to print the result of an expression evaluation;
+
+* ``{% %}``: used to execute statements.
+
+To understand why Twig exposes so many extension points, let's see how to
+implement a *Lorem ipsum* generator (it needs to know the number of words to
+generate).
+
+You can use a ``lipsum`` *tag*:
+
+.. code-block:: jinja
+
+    {% lipsum 40 %}
+
+That works, but using a tag for ``lipsum`` is not a good idea for at least
+three main reasons:
+
+* ``lipsum`` is not a language construct;
+* The tag outputs something;
+* The tag is not flexible as you cannot use it in an expression:
+
+  .. code-block:: jinja
+
+      {{ 'some text' ~ {% lipsum 40 %} ~ 'some more text' }}
+
+In fact, you rarely need to create tags; and that's good news because tags are
+the most complex extension point of Twig.
+
+Now, let's use a ``lipsum`` *filter*:
+
+.. code-block:: jinja
+
+    {{ 40|lipsum }}
+
+Again, it works, but it looks weird. A filter transforms the passed value to
+something else but here we use the value to indicate the number of words to
+generate (so, ``40`` is an argument of the filter, not the value we want to
+transform).
+
+Next, let's use a ``lipsum`` *function*:
+
+.. code-block:: jinja
+
+    {{ lipsum(40) }}
+
+Here we go. For this specific example, the creation of a function is the
+extension point to use. And you can use it anywhere an expression is accepted:
+
+.. code-block:: jinja
+
+    {{ 'some text' ~ lipsum(40) ~ 'some more text' }}
+
+    {% set lipsum = lipsum(40) %}
+
+Last but not the least, you can also use a *global* object with a method able
+to generate lorem ipsum text:
+
+.. code-block:: jinja
+
+    {{ text.lipsum(40) }}
+
+As a rule of thumb, use functions for frequently used features and global
+objects for everything else.
+
+Keep in mind the following when you want to extend Twig:
+
+========== ========================== ========== =========================
+What?      Implementation difficulty? How often? When?
+========== ========================== ========== =========================
+*macro*    trivial                    frequent   Content generation
+*global*   trivial                    frequent   Helper object
+*function* trivial                    frequent   Content generation
+*filter*   trivial                    frequent   Value transformation
+*tag*      complex                    rare       DSL language construct
+*test*     trivial                    rare       Boolean decision
+*operator* trivial                    rare       Values transformation
+========== ========================== ========== =========================
+
+Globals
+-------
+
+A global variable is like any other template variable, except that it's
+available in all templates and macros::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addGlobal('text', new Text());
+
+You can then use the ``text`` variable anywhere in a template:
+
+.. code-block:: jinja
+
+    {{ text.lipsum(40) }}
+
+Filters
+-------
+
+Creating a filter is as simple as associating a name with a PHP callable::
+
+    // an anonymous function
+    $filter = new Twig_SimpleFilter('rot13', function ($string) {
+        return str_rot13($string);
+    });
+
+    // or a simple PHP function
+    $filter = new Twig_SimpleFilter('rot13', 'str_rot13');
+
+    // or a class method
+    $filter = new Twig_SimpleFilter('rot13', array('SomeClass', 'rot13Filter'));
+
+The first argument passed to the ``Twig_SimpleFilter`` constructor is the name
+of the filter you will use in templates and the second one is the PHP callable
+to associate with it.
+
+Then, add the filter to your Twig environment::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addFilter($filter);
+
+And here is how to use it in a template:
+
+.. code-block:: jinja
+
+    {{ 'Twig'|rot13 }}
+
+    {# will output Gjvt #}
+
+When called by Twig, the PHP callable receives the left side of the filter
+(before the pipe ``|``) as the first argument and the extra arguments passed
+to the filter (within parentheses ``()``) as extra arguments.
+
+For instance, the following code:
+
+.. code-block:: jinja
+
+    {{ 'TWIG'|lower }}
+    {{ now|date('d/m/Y') }}
+
+is compiled to something like the following::
+
+    <?php echo strtolower('TWIG') ?>
+    <?php echo twig_date_format_filter($now, 'd/m/Y') ?>
+
+The ``Twig_SimpleFilter`` class takes an array of options as its last
+argument::
+
+    $filter = new Twig_SimpleFilter('rot13', 'str_rot13', $options);
+
+Environment aware Filters
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If you want to access the current environment instance in your filter, set the
+``needs_environment`` option to ``true``; Twig will pass the current
+environment as the first argument to the filter call::
+
+    $filter = new Twig_SimpleFilter('rot13', function (Twig_Environment $env, $string) {
+        // get the current charset for instance
+        $charset = $env->getCharset();
+
+        return str_rot13($string);
+    }, array('needs_environment' => true));
+
+Context aware Filters
+~~~~~~~~~~~~~~~~~~~~~
+
+If you want to access the current context in your filter, set the
+``needs_context`` option to ``true``; Twig will pass the current context as
+the first argument to the filter call (or the second one if
+``needs_environment`` is also set to ``true``)::
+
+    $filter = new Twig_SimpleFilter('rot13', function ($context, $string) {
+        // ...
+    }, array('needs_context' => true));
+
+    $filter = new Twig_SimpleFilter('rot13', function (Twig_Environment $env, $context, $string) {
+        // ...
+    }, array('needs_context' => true, 'needs_environment' => true));
+
+Automatic Escaping
+~~~~~~~~~~~~~~~~~~
+
+If automatic escaping is enabled, the output of the filter may be escaped
+before printing. If your filter acts as an escaper (or explicitly outputs html
+or JavaScript code), you will want the raw output to be printed. In such a
+case, set the ``is_safe`` option::
+
+    $filter = new Twig_SimpleFilter('nl2br', 'nl2br', array('is_safe' => array('html')));
+
+Some filters may need to work on input that is already escaped or safe, for
+example when adding (safe) html tags to originally unsafe output. In such a
+case, set the ``pre_escape`` option to escape the input data before it is run
+through your filter::
+
+    $filter = new Twig_SimpleFilter('somefilter', 'somefilter', array('pre_escape' => 'html', 'is_safe' => array('html')));
+
+Dynamic Filters
+~~~~~~~~~~~~~~~
+
+A filter name containing the special ``*`` character is a dynamic filter as
+the ``*`` can be any string::
+
+    $filter = new Twig_SimpleFilter('*_path', function ($name, $arguments) {
+        // ...
+    });
+
+The following filters will be matched by the above defined dynamic filter:
+
+* ``product_path``
+* ``category_path``
+
+A dynamic filter can define more than one dynamic parts::
+
+    $filter = new Twig_SimpleFilter('*_path_*', function ($name, $suffix, $arguments) {
+        // ...
+    });
+
+The filter will receive all dynamic part values before the normal filter
+arguments, but after the environment and the context. For instance, a call to
+``'foo'|a_path_b()`` will result in the following arguments to be passed to
+the filter: ``('a', 'b', 'foo')``.
+
+Functions
+---------
+
+Functions are defined in the exact same way as filters, but you need to create
+an instance of ``Twig_SimpleFunction``::
+
+    $twig = new Twig_Environment($loader);
+    $function = new Twig_SimpleFunction('function_name', function () {
+        // ...
+    });
+    $twig->addFunction($function);
+
+Functions support the same features as filters, except for the ``pre_escape``
+and ``preserves_safety`` options.
+
+Tests
+-----
+
+Tests are defined in the exact same way as filters and functions, but you need
+to create an instance of ``Twig_SimpleTest``::
+
+    $twig = new Twig_Environment($loader);
+    $test = new Twig_SimpleTest('test_name', function () {
+        // ...
+    });
+    $twig->addTest($test);
+
+Tests allow you to create custom application specific logic for evaluating
+boolean conditions. As a simple, example let's create a Twig test that checks if
+objects are 'red'::
+
+    $twig = new Twig_Environment($loader)
+    $test = new Twig_SimpleTest('red', function ($value) {
+        if (isset($value->color) && $value->color == 'red') {
+            return true;
+        }
+        if (isset($value->paint) && $value->paint == 'red') {
+            return true;
+        }
+        return false;
+    });
+    $twig->addTest($test);
+
+Test functions should always return true/false.
+
+When creating tests you can use the ``node_class`` option to provide custom test
+compilation. This is useful if your test can be compiled into PHP primitives.
+This is used by many of the tests built into Twig::
+
+    $twig = new Twig_Environment($loader)
+    $test = new Twig_SimpleTest(
+        'odd',
+        null,
+        array('node_class' => 'Twig_Node_Expression_Test_Odd'));
+    $twig->addTest($test);
+
+    class Twig_Node_Expression_Test_Odd extends Twig_Node_Expression_Test
+    {
+        public function compile(Twig_Compiler $compiler)
+        {
+            $compiler
+                ->raw('(')
+                ->subcompile($this->getNode('node'))
+                ->raw(' % 2 == 1')
+                ->raw(')')
+            ;
+        }
+    }
+
+The above example, shows how you can create tests that use a node class. The
+node class has access to one sub-node called 'node'. This sub-node contains the
+value that is being tested. When the ``odd`` filter is used in code like:
+
+.. code-block:: jinja
+
+    {% if my_value is odd %}
+
+The ``node`` sub-node will contain an expression of ``my_value``. Node based
+tests also have access to the ``arguments`` node. This node will contain the
+various other arguments that have been provided to your test.
+
+Tags
+----
+
+One of the most exciting feature of a template engine like Twig is the
+possibility to define new language constructs. This is also the most complex
+feature as you need to understand how Twig's internals work.
+
+Let's create a simple ``set`` tag that allows the definition of simple
+variables from within a template. The tag can be used like follows:
+
+.. code-block:: jinja
+
+    {% set name = "value" %}
+
+    {{ name }}
+
+    {# should output value #}
+
+.. note::
+
+    The ``set`` tag is part of the Core extension and as such is always
+    available. The built-in version is slightly more powerful and supports
+    multiple assignments by default (cf. the template designers chapter for
+    more information).
+
+Three steps are needed to define a new tag:
+
+* Defining a Token Parser class (responsible for parsing the template code);
+
+* Defining a Node class (responsible for converting the parsed code to PHP);
+
+* Registering the tag.
+
+Registering a new tag
+~~~~~~~~~~~~~~~~~~~~~
+
+Adding a tag is as simple as calling the ``addTokenParser`` method on the
+``Twig_Environment`` instance::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addTokenParser(new Project_Set_TokenParser());
+
+Defining a Token Parser
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Now, let's see the actual code of this class::
+
+    class Project_Set_TokenParser extends Twig_TokenParser
+    {
+        public function parse(Twig_Token $token)
+        {
+            $parser = $this->parser;
+            $stream = $parser->getStream();
+
+            $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+            $stream->expect(Twig_Token::OPERATOR_TYPE, '=');
+            $value = $parser->getExpressionParser()->parseExpression();
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+            return new Project_Set_Node($name, $value, $token->getLine(), $this->getTag());
+        }
+
+        public function getTag()
+        {
+            return 'set';
+        }
+    }
+
+The ``getTag()`` method must return the tag we want to parse, here ``set``.
+
+The ``parse()`` method is invoked whenever the parser encounters a ``set``
+tag. It should return a ``Twig_Node`` instance that represents the node (the
+``Project_Set_Node`` calls creating is explained in the next section).
+
+The parsing process is simplified thanks to a bunch of methods you can call
+from the token stream (``$this->parser->getStream()``):
+
+* ``getCurrent()``: Gets the current token in the stream.
+
+* ``next()``: Moves to the next token in the stream, *but returns the old one*.
+
+* ``test($type)``, ``test($value)`` or ``test($type, $value)``: Determines whether
+  the current token is of a particular type or value (or both). The value may be an
+  array of several possible values.
+
+* ``expect($type[, $value[, $message]])``: If the current token isn't of the given
+  type/value a syntax error is thrown. Otherwise, if the type and value are correct,
+  the token is returned and the stream moves to the next token.
+
+* ``look()``: Looks a the next token without consuming it.
+
+Parsing expressions is done by calling the ``parseExpression()`` like we did for
+the ``set`` tag.
+
+.. tip::
+
+    Reading the existing ``TokenParser`` classes is the best way to learn all
+    the nitty-gritty details of the parsing process.
+
+Defining a Node
+~~~~~~~~~~~~~~~
+
+The ``Project_Set_Node`` class itself is rather simple::
+
+    class Project_Set_Node extends Twig_Node
+    {
+        public function __construct($name, Twig_Node_Expression $value, $line, $tag = null)
+        {
+            parent::__construct(array('value' => $value), array('name' => $name), $line, $tag);
+        }
+
+        public function compile(Twig_Compiler $compiler)
+        {
+            $compiler
+                ->addDebugInfo($this)
+                ->write('$context[\''.$this->getAttribute('name').'\'] = ')
+                ->subcompile($this->getNode('value'))
+                ->raw(";\n")
+            ;
+        }
+    }
+
+The compiler implements a fluid interface and provides methods that helps the
+developer generate beautiful and readable PHP code:
+
+* ``subcompile()``: Compiles a node.
+
+* ``raw()``: Writes the given string as is.
+
+* ``write()``: Writes the given string by adding indentation at the beginning
+  of each line.
+
+* ``string()``: Writes a quoted string.
+
+* ``repr()``: Writes a PHP representation of a given value (see
+  ``Twig_Node_For`` for a usage example).
+
+* ``addDebugInfo()``: Adds the line of the original template file related to
+  the current node as a comment.
+
+* ``indent()``: Indents the generated code (see ``Twig_Node_Block`` for a
+  usage example).
+
+* ``outdent()``: Outdents the generated code (see ``Twig_Node_Block`` for a
+  usage example).
+
+.. _creating_extensions:
+
+Creating an Extension
+---------------------
+
+The main motivation for writing an extension is to move often used code into a
+reusable class like adding support for internationalization. An extension can
+define tags, filters, tests, operators, global variables, functions, and node
+visitors.
+
+Creating an extension also makes for a better separation of code that is
+executed at compilation time and code needed at runtime. As such, it makes
+your code faster.
+
+Most of the time, it is useful to create a single extension for your project,
+to host all the specific tags and filters you want to add to Twig.
+
+.. tip::
+
+    When packaging your code into an extension, Twig is smart enough to
+    recompile your templates whenever you make a change to it (when
+    ``auto_reload`` is enabled).
+
+.. note::
+
+    Before writing your own extensions, have a look at the Twig official
+    extension repository: http://github.com/fabpot/Twig-extensions.
+
+An extension is a class that implements the following interface::
+
+    interface Twig_ExtensionInterface
+    {
+        /**
+         * Initializes the runtime environment.
+         *
+         * This is where you can load some file that contains filter functions for instance.
+         *
+         * @param Twig_Environment $environment The current Twig_Environment instance
+         */
+        function initRuntime(Twig_Environment $environment);
+
+        /**
+         * Returns the token parser instances to add to the existing list.
+         *
+         * @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
+         */
+        function getTokenParsers();
+
+        /**
+         * Returns the node visitor instances to add to the existing list.
+         *
+         * @return array An array of Twig_NodeVisitorInterface instances
+         */
+        function getNodeVisitors();
+
+        /**
+         * Returns a list of filters to add to the existing list.
+         *
+         * @return array An array of filters
+         */
+        function getFilters();
+
+        /**
+         * Returns a list of tests to add to the existing list.
+         *
+         * @return array An array of tests
+         */
+        function getTests();
+
+        /**
+         * Returns a list of functions to add to the existing list.
+         *
+         * @return array An array of functions
+         */
+        function getFunctions();
+
+        /**
+         * Returns a list of operators to add to the existing list.
+         *
+         * @return array An array of operators
+         */
+        function getOperators();
+
+        /**
+         * Returns a list of global variables to add to the existing list.
+         *
+         * @return array An array of global variables
+         */
+        function getGlobals();
+
+        /**
+         * Returns the name of the extension.
+         *
+         * @return string The extension name
+         */
+        function getName();
+    }
+
+To keep your extension class clean and lean, it can inherit from the built-in
+``Twig_Extension`` class instead of implementing the whole interface. That
+way, you just need to implement the ``getName()`` method as the
+``Twig_Extension`` provides empty implementations for all other methods.
+
+The ``getName()`` method must return a unique identifier for your extension.
+
+Now, with this information in mind, let's create the most basic extension
+possible::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getName()
+        {
+            return 'project';
+        }
+    }
+
+.. note::
+
+    Of course, this extension does nothing for now. We will customize it in
+    the next sections.
+
+Twig does not care where you save your extension on the filesystem, as all
+extensions must be registered explicitly to be available in your templates.
+
+You can register an extension by using the ``addExtension()`` method on your
+main ``Environment`` object::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addExtension(new Project_Twig_Extension());
+
+Of course, you need to first load the extension file by either using
+``require_once()`` or by using an autoloader (see `spl_autoload_register()`_).
+
+.. tip::
+
+    The bundled extensions are great examples of how extensions work.
+
+Globals
+~~~~~~~
+
+Global variables can be registered in an extension via the ``getGlobals()``
+method::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getGlobals()
+        {
+            return array(
+                'text' => new Text(),
+            );
+        }
+
+        // ...
+    }
+
+Functions
+~~~~~~~~~
+
+Functions can be registered in an extension via the ``getFunctions()``
+method::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getFunctions()
+        {
+            return array(
+                new Twig_SimpleFunction('lipsum', 'generate_lipsum'),
+            );
+        }
+
+        // ...
+    }
+
+Filters
+~~~~~~~
+
+To add a filter to an extension, you need to override the ``getFilters()``
+method. This method must return an array of filters to add to the Twig
+environment::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getFilters()
+        {
+            return array(
+                new Twig_SimpleFilter('rot13', 'str_rot13'),
+            );
+        }
+
+        // ...
+    }
+
+Tags
+~~~~
+
+Adding a tag in an extension can be done by overriding the
+``getTokenParsers()`` method. This method must return an array of tags to add
+to the Twig environment::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getTokenParsers()
+        {
+            return array(new Project_Set_TokenParser());
+        }
+
+        // ...
+    }
+
+In the above code, we have added a single new tag, defined by the
+``Project_Set_TokenParser`` class. The ``Project_Set_TokenParser`` class is
+responsible for parsing the tag and compiling it to PHP.
+
+Operators
+~~~~~~~~~
+
+The ``getOperators()`` methods allows to add new operators. Here is how to add
+``!``, ``||``, and ``&&`` operators::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getOperators()
+        {
+            return array(
+                array(
+                    '!' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Not'),
+                ),
+                array(
+                    '||' => array('precedence' => 10, 'class' => 'Twig_Node_Expression_Binary_Or', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                    '&&' => array('precedence' => 15, 'class' => 'Twig_Node_Expression_Binary_And', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                ),
+            );
+        }
+
+        // ...
+    }
+
+Tests
+~~~~~
+
+The ``getTests()`` methods allows to add new test functions::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getTests()
+        {
+            return array(
+                new Twig_SimpleTest('even', 'twig_test_even'),
+            );
+        }
+
+        // ...
+    }
+
+Overloading
+-----------
+
+To overload an already defined filter, test, operator, global variable, or
+function, define it again **as late as possible**::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addFilter(new Twig_SimpleFilter('date', function ($timestamp, $format = 'F j, Y H:i') {
+        // do something different from the built-in date filter
+    }));
+
+Here, we have overloaded the built-in ``date`` filter with a custom one.
+
+That also works with an extension::
+
+    class MyCoreExtension extends Twig_Extension
+    {
+        public function getFilters()
+        {
+            return array(
+                new Twig_SimpleFilter('date', array($this, 'dateFilter')),
+            );
+        }
+
+        public function dateFilter($timestamp, $format = 'F j, Y H:i')
+        {
+            // do something different from the built-in date filter
+        }
+
+        public function getName()
+        {
+            return 'project';
+        }
+    }
+
+    $twig = new Twig_Environment($loader);
+    $twig->addExtension(new MyCoreExtension());
+
+.. caution::
+
+    Note that overloading the built-in Twig elements is not recommended as it
+    might be confusing.
+
+Testing an Extension
+--------------------
+
+Functional Tests
+~~~~~~~~~~~~~~~~
+
+You can create functional tests for extensions simply by creating the
+following file structure in your test directory::
+
+    Fixtures/
+        filters/
+            foo.test
+            bar.test
+        functions/
+            foo.test
+            bar.test
+        tags/
+            foo.test
+            bar.test
+    IntegrationTest.php
+
+The ``IntegrationTest.php`` file should look like this::
+
+    class Project_Tests_IntegrationTest extends Twig_Test_IntegrationTestCase
+    {
+        public function getExtensions()
+        {
+            return array(
+                new Project_Twig_Extension1(),
+                new Project_Twig_Extension2(),
+            );
+        }
+
+        public function getFixturesDir()
+        {
+            return dirname(__FILE__).'/Fixtures/';
+        }
+    }
+
+Fixtures examples can be found within the Twig repository
+`tests/Twig/Fixtures`_ directory.
+
+Node Tests
+~~~~~~~~~~
+
+Testing the node visitors can be complex, so extend your test cases from
+``Twig_Test_NodeTestCase``. Examples can be found in the Twig repository
+`tests/Twig/Node`_ directory.
+
+.. _`spl_autoload_register()`: http://www.php.net/spl_autoload_register
+.. _`rot13`:                   http://www.php.net/manual/en/function.str-rot13.php
+.. _`tests/Twig/Fixtures`:     https://github.com/fabpot/Twig/tree/master/test/Twig/Tests/Fixtures
+.. _`tests/Twig/Node`:         https://github.com/fabpot/Twig/tree/master/test/Twig/Tests/Node
diff --git a/vendor/twig/twig/doc/advanced_legacy.rst b/vendor/twig/twig/doc/advanced_legacy.rst
new file mode 100644
index 00000000..3d34f932
--- /dev/null
+++ b/vendor/twig/twig/doc/advanced_legacy.rst
@@ -0,0 +1,887 @@
+Extending Twig
+==============
+
+.. caution::
+
+    This section describes how to extends Twig for versions **older than
+    1.12**. If you are using a newer version, read the :doc:`newer<advanced>`
+    chapter instead.
+
+Twig can be extended in many ways; you can add extra tags, filters, tests,
+operators, global variables, and functions. You can even extend the parser
+itself with node visitors.
+
+.. note::
+
+    The first section of this chapter describes how to extend Twig easily. If
+    you want to reuse your changes in different projects or if you want to
+    share them with others, you should then create an extension as described
+    in the following section.
+
+.. caution::
+
+    When extending Twig by calling methods on the Twig environment instance,
+    Twig won't be able to recompile your templates when the PHP code is
+    updated. To see your changes in real-time, either disable template caching
+    or package your code into an extension (see the next section of this
+    chapter).
+
+Before extending Twig, you must understand the differences between all the
+different possible extension points and when to use them.
+
+First, remember that Twig has two main language constructs:
+
+* ``{{ }}``: used to print the result of an expression evaluation;
+
+* ``{% %}``: used to execute statements.
+
+To understand why Twig exposes so many extension points, let's see how to
+implement a *Lorem ipsum* generator (it needs to know the number of words to
+generate).
+
+You can use a ``lipsum`` *tag*:
+
+.. code-block:: jinja
+
+    {% lipsum 40 %}
+
+That works, but using a tag for ``lipsum`` is not a good idea for at least
+three main reasons:
+
+* ``lipsum`` is not a language construct;
+* The tag outputs something;
+* The tag is not flexible as you cannot use it in an expression:
+
+  .. code-block:: jinja
+
+      {{ 'some text' ~ {% lipsum 40 %} ~ 'some more text' }}
+
+In fact, you rarely need to create tags; and that's good news because tags are
+the most complex extension point of Twig.
+
+Now, let's use a ``lipsum`` *filter*:
+
+.. code-block:: jinja
+
+    {{ 40|lipsum }}
+
+Again, it works, but it looks weird. A filter transforms the passed value to
+something else but here we use the value to indicate the number of words to
+generate (so, ``40`` is an argument of the filter, not the value we want to
+transform).
+
+Next, let's use a ``lipsum`` *function*:
+
+.. code-block:: jinja
+
+    {{ lipsum(40) }}
+
+Here we go. For this specific example, the creation of a function is the
+extension point to use. And you can use it anywhere an expression is accepted:
+
+.. code-block:: jinja
+
+    {{ 'some text' ~ ipsum(40) ~ 'some more text' }}
+
+    {% set ipsum = ipsum(40) %}
+
+Last but not the least, you can also use a *global* object with a method able
+to generate lorem ipsum text:
+
+.. code-block:: jinja
+
+    {{ text.lipsum(40) }}
+
+As a rule of thumb, use functions for frequently used features and global
+objects for everything else.
+
+Keep in mind the following when you want to extend Twig:
+
+========== ========================== ========== =========================
+What?      Implementation difficulty? How often? When?
+========== ========================== ========== =========================
+*macro*    trivial                    frequent   Content generation
+*global*   trivial                    frequent   Helper object
+*function* trivial                    frequent   Content generation
+*filter*   trivial                    frequent   Value transformation
+*tag*      complex                    rare       DSL language construct
+*test*     trivial                    rare       Boolean decision
+*operator* trivial                    rare       Values transformation
+========== ========================== ========== =========================
+
+Globals
+-------
+
+A global variable is like any other template variable, except that it's
+available in all templates and macros::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addGlobal('text', new Text());
+
+You can then use the ``text`` variable anywhere in a template:
+
+.. code-block:: jinja
+
+    {{ text.lipsum(40) }}
+
+Filters
+-------
+
+A filter is a regular PHP function or an object method that takes the left
+side of the filter (before the pipe ``|``) as first argument and the extra
+arguments passed to the filter (within parentheses ``()``) as extra arguments.
+
+Defining a filter is as easy as associating the filter name with a PHP
+callable. For instance, let's say you have the following code in a template:
+
+.. code-block:: jinja
+
+    {{ 'TWIG'|lower }}
+
+When compiling this template to PHP, Twig looks for the PHP callable
+associated with the ``lower`` filter. The ``lower`` filter is a built-in Twig
+filter, and it is simply mapped to the PHP ``strtolower()`` function. After
+compilation, the generated PHP code is roughly equivalent to:
+
+.. code-block:: html+php
+
+    <?php echo strtolower('TWIG') ?>
+
+As you can see, the ``'TWIG'`` string is passed as a first argument to the PHP
+function.
+
+A filter can also take extra arguments like in the following example:
+
+.. code-block:: jinja
+
+    {{ now|date('d/m/Y') }}
+
+In this case, the extra arguments are passed to the function after the main
+argument, and the compiled code is equivalent to:
+
+.. code-block:: html+php
+
+    <?php echo twig_date_format_filter($now, 'd/m/Y') ?>
+
+Let's see how to create a new filter.
+
+In this section, we will create a ``rot13`` filter, which should return the
+`rot13`_ transformation of a string. Here is an example of its usage and the
+expected output:
+
+.. code-block:: jinja
+
+    {{ "Twig"|rot13 }}
+
+    {# should displays Gjvt #}
+
+Adding a filter is as simple as calling the ``addFilter()`` method on the
+``Twig_Environment`` instance::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addFilter('rot13', new Twig_Filter_Function('str_rot13'));
+
+The second argument of ``addFilter()`` is an instance of ``Twig_Filter``.
+Here, we use ``Twig_Filter_Function`` as the filter is a PHP function. The
+first argument passed to the ``Twig_Filter_Function`` constructor is the name
+of the PHP function to call, here ``str_rot13``, a native PHP function.
+
+Let's say I now want to be able to add a prefix before the converted string:
+
+.. code-block:: jinja
+
+    {{ "Twig"|rot13('prefix_') }}
+
+    {# should displays prefix_Gjvt #}
+
+As the PHP ``str_rot13()`` function does not support this requirement, let's
+create a new PHP function::
+
+    function project_compute_rot13($string, $prefix = '')
+    {
+        return $prefix.str_rot13($string);
+    }
+
+As you can see, the ``prefix`` argument of the filter is passed as an extra
+argument to the ``project_compute_rot13()`` function.
+
+Adding this filter is as easy as before::
+
+    $twig->addFilter('rot13', new Twig_Filter_Function('project_compute_rot13'));
+
+For better encapsulation, a filter can also be defined as a static method of a
+class. The ``Twig_Filter_Function`` class can also be used to register such
+static methods as filters::
+
+    $twig->addFilter('rot13', new Twig_Filter_Function('SomeClass::rot13Filter'));
+
+.. tip::
+
+    In an extension, you can also define a filter as a static method of the
+    extension class.
+
+Environment aware Filters
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``Twig_Filter`` classes take options as their last argument. For instance,
+if you want access to the current environment instance in your filter, set the
+``needs_environment`` option to ``true``::
+
+    $filter = new Twig_Filter_Function('str_rot13', array('needs_environment' => true));
+
+Twig will then pass the current environment as the first argument to the
+filter call::
+
+    function twig_compute_rot13(Twig_Environment $env, $string)
+    {
+        // get the current charset for instance
+        $charset = $env->getCharset();
+
+        return str_rot13($string);
+    }
+
+Automatic Escaping
+~~~~~~~~~~~~~~~~~~
+
+If automatic escaping is enabled, the output of the filter may be escaped
+before printing. If your filter acts as an escaper (or explicitly outputs html
+or javascript code), you will want the raw output to be printed. In such a
+case, set the ``is_safe`` option::
+
+    $filter = new Twig_Filter_Function('nl2br', array('is_safe' => array('html')));
+
+Some filters may need to work on input that is already escaped or safe, for
+example when adding (safe) html tags to originally unsafe output. In such a
+case, set the ``pre_escape`` option to escape the input data before it is run
+through your filter::
+
+    $filter = new Twig_Filter_Function('somefilter', array('pre_escape' => 'html', 'is_safe' => array('html')));
+
+Dynamic Filters
+~~~~~~~~~~~~~~~
+
+.. versionadded:: 1.5
+    Dynamic filters support was added in Twig 1.5.
+
+A filter name containing the special ``*`` character is a dynamic filter as
+the ``*`` can be any string::
+
+    $twig->addFilter('*_path_*', new Twig_Filter_Function('twig_path'));
+
+    function twig_path($name, $arguments)
+    {
+        // ...
+    }
+
+The following filters will be matched by the above defined dynamic filter:
+
+* ``product_path``
+* ``category_path``
+
+A dynamic filter can define more than one dynamic parts::
+
+    $twig->addFilter('*_path_*', new Twig_Filter_Function('twig_path'));
+
+    function twig_path($name, $suffix, $arguments)
+    {
+        // ...
+    }
+
+The filter will receive all dynamic part values before the normal filters
+arguments. For instance, a call to ``'foo'|a_path_b()`` will result in the
+following PHP call: ``twig_path('a', 'b', 'foo')``.
+
+Functions
+---------
+
+A function is a regular PHP function or an object method that can be called from
+templates.
+
+.. code-block:: jinja
+
+    {{ constant("DATE_W3C") }}
+
+When compiling this template to PHP, Twig looks for the PHP callable
+associated with the ``constant`` function. The ``constant`` function is a built-in Twig
+function, and it is simply mapped to the PHP ``constant()`` function. After
+compilation, the generated PHP code is roughly equivalent to:
+
+.. code-block:: html+php
+
+    <?php echo constant('DATE_W3C') ?>
+
+Adding a function is similar to adding a filter. This can be done by calling the
+``addFunction()`` method on the ``Twig_Environment`` instance::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addFunction('functionName', new Twig_Function_Function('someFunction'));
+
+You can also expose extension methods as functions in your templates::
+
+    // $this is an object that implements Twig_ExtensionInterface.
+    $twig = new Twig_Environment($loader);
+    $twig->addFunction('otherFunction', new Twig_Function_Method($this, 'someMethod'));
+
+Functions also support ``needs_environment`` and ``is_safe`` parameters.
+
+Dynamic Functions
+~~~~~~~~~~~~~~~~~
+
+.. versionadded:: 1.5
+    Dynamic functions support was added in Twig 1.5.
+
+A function name containing the special ``*`` character is a dynamic function
+as the ``*`` can be any string::
+
+    $twig->addFunction('*_path', new Twig_Function_Function('twig_path'));
+
+    function twig_path($name, $arguments)
+    {
+        // ...
+    }
+
+The following functions will be matched by the above defined dynamic function:
+
+* ``product_path``
+* ``category_path``
+
+A dynamic function can define more than one dynamic parts::
+
+    $twig->addFilter('*_path_*', new Twig_Filter_Function('twig_path'));
+
+    function twig_path($name, $suffix, $arguments)
+    {
+        // ...
+    }
+
+The function will receive all dynamic part values before the normal functions
+arguments. For instance, a call to ``a_path_b('foo')`` will result in the
+following PHP call: ``twig_path('a', 'b', 'foo')``.
+
+Tags
+----
+
+One of the most exciting feature of a template engine like Twig is the
+possibility to define new language constructs. This is also the most complex
+feature as you need to understand how Twig's internals work.
+
+Let's create a simple ``set`` tag that allows the definition of simple
+variables from within a template. The tag can be used like follows:
+
+.. code-block:: jinja
+
+    {% set name = "value" %}
+
+    {{ name }}
+
+    {# should output value #}
+
+.. note::
+
+    The ``set`` tag is part of the Core extension and as such is always
+    available. The built-in version is slightly more powerful and supports
+    multiple assignments by default (cf. the template designers chapter for
+    more information).
+
+Three steps are needed to define a new tag:
+
+* Defining a Token Parser class (responsible for parsing the template code);
+
+* Defining a Node class (responsible for converting the parsed code to PHP);
+
+* Registering the tag.
+
+Registering a new tag
+~~~~~~~~~~~~~~~~~~~~~
+
+Adding a tag is as simple as calling the ``addTokenParser`` method on the
+``Twig_Environment`` instance::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addTokenParser(new Project_Set_TokenParser());
+
+Defining a Token Parser
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Now, let's see the actual code of this class::
+
+    class Project_Set_TokenParser extends Twig_TokenParser
+    {
+        public function parse(Twig_Token $token)
+        {
+            $lineno = $token->getLine();
+            $name = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE)->getValue();
+            $this->parser->getStream()->expect(Twig_Token::OPERATOR_TYPE, '=');
+            $value = $this->parser->getExpressionParser()->parseExpression();
+
+            $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+            return new Project_Set_Node($name, $value, $lineno, $this->getTag());
+        }
+
+        public function getTag()
+        {
+            return 'set';
+        }
+    }
+
+The ``getTag()`` method must return the tag we want to parse, here ``set``.
+
+The ``parse()`` method is invoked whenever the parser encounters a ``set``
+tag. It should return a ``Twig_Node`` instance that represents the node (the
+``Project_Set_Node`` calls creating is explained in the next section).
+
+The parsing process is simplified thanks to a bunch of methods you can call
+from the token stream (``$this->parser->getStream()``):
+
+* ``getCurrent()``: Gets the current token in the stream.
+
+* ``next()``: Moves to the next token in the stream, *but returns the old one*.
+
+* ``test($type)``, ``test($value)`` or ``test($type, $value)``: Determines whether
+  the current token is of a particular type or value (or both). The value may be an
+  array of several possible values.
+
+* ``expect($type[, $value[, $message]])``: If the current token isn't of the given
+  type/value a syntax error is thrown. Otherwise, if the type and value are correct,
+  the token is returned and the stream moves to the next token.
+
+* ``look()``: Looks a the next token without consuming it.
+
+Parsing expressions is done by calling the ``parseExpression()`` like we did for
+the ``set`` tag.
+
+.. tip::
+
+    Reading the existing ``TokenParser`` classes is the best way to learn all
+    the nitty-gritty details of the parsing process.
+
+Defining a Node
+~~~~~~~~~~~~~~~
+
+The ``Project_Set_Node`` class itself is rather simple::
+
+    class Project_Set_Node extends Twig_Node
+    {
+        public function __construct($name, Twig_Node_Expression $value, $lineno, $tag = null)
+        {
+            parent::__construct(array('value' => $value), array('name' => $name), $lineno, $tag);
+        }
+
+        public function compile(Twig_Compiler $compiler)
+        {
+            $compiler
+                ->addDebugInfo($this)
+                ->write('$context[\''.$this->getAttribute('name').'\'] = ')
+                ->subcompile($this->getNode('value'))
+                ->raw(";\n")
+            ;
+        }
+    }
+
+The compiler implements a fluid interface and provides methods that helps the
+developer generate beautiful and readable PHP code:
+
+* ``subcompile()``: Compiles a node.
+
+* ``raw()``: Writes the given string as is.
+
+* ``write()``: Writes the given string by adding indentation at the beginning
+  of each line.
+
+* ``string()``: Writes a quoted string.
+
+* ``repr()``: Writes a PHP representation of a given value (see
+  ``Twig_Node_For`` for a usage example).
+
+* ``addDebugInfo()``: Adds the line of the original template file related to
+  the current node as a comment.
+
+* ``indent()``: Indents the generated code (see ``Twig_Node_Block`` for a
+  usage example).
+
+* ``outdent()``: Outdents the generated code (see ``Twig_Node_Block`` for a
+  usage example).
+
+.. _creating_extensions:
+
+Creating an Extension
+---------------------
+
+The main motivation for writing an extension is to move often used code into a
+reusable class like adding support for internationalization. An extension can
+define tags, filters, tests, operators, global variables, functions, and node
+visitors.
+
+Creating an extension also makes for a better separation of code that is
+executed at compilation time and code needed at runtime. As such, it makes
+your code faster.
+
+Most of the time, it is useful to create a single extension for your project,
+to host all the specific tags and filters you want to add to Twig.
+
+.. tip::
+
+    When packaging your code into an extension, Twig is smart enough to
+    recompile your templates whenever you make a change to it (when the
+    ``auto_reload`` is enabled).
+
+.. note::
+
+    Before writing your own extensions, have a look at the Twig official
+    extension repository: http://github.com/fabpot/Twig-extensions.
+
+An extension is a class that implements the following interface::
+
+    interface Twig_ExtensionInterface
+    {
+        /**
+         * Initializes the runtime environment.
+         *
+         * This is where you can load some file that contains filter functions for instance.
+         *
+         * @param Twig_Environment $environment The current Twig_Environment instance
+         */
+        function initRuntime(Twig_Environment $environment);
+
+        /**
+         * Returns the token parser instances to add to the existing list.
+         *
+         * @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
+         */
+        function getTokenParsers();
+
+        /**
+         * Returns the node visitor instances to add to the existing list.
+         *
+         * @return array An array of Twig_NodeVisitorInterface instances
+         */
+        function getNodeVisitors();
+
+        /**
+         * Returns a list of filters to add to the existing list.
+         *
+         * @return array An array of filters
+         */
+        function getFilters();
+
+        /**
+         * Returns a list of tests to add to the existing list.
+         *
+         * @return array An array of tests
+         */
+        function getTests();
+
+        /**
+         * Returns a list of functions to add to the existing list.
+         *
+         * @return array An array of functions
+         */
+        function getFunctions();
+
+        /**
+         * Returns a list of operators to add to the existing list.
+         *
+         * @return array An array of operators
+         */
+        function getOperators();
+
+        /**
+         * Returns a list of global variables to add to the existing list.
+         *
+         * @return array An array of global variables
+         */
+        function getGlobals();
+
+        /**
+         * Returns the name of the extension.
+         *
+         * @return string The extension name
+         */
+        function getName();
+    }
+
+To keep your extension class clean and lean, it can inherit from the built-in
+``Twig_Extension`` class instead of implementing the whole interface. That
+way, you just need to implement the ``getName()`` method as the
+``Twig_Extension`` provides empty implementations for all other methods.
+
+The ``getName()`` method must return a unique identifier for your extension.
+
+Now, with this information in mind, let's create the most basic extension
+possible::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getName()
+        {
+            return 'project';
+        }
+    }
+
+.. note::
+
+    Of course, this extension does nothing for now. We will customize it in
+    the next sections.
+
+Twig does not care where you save your extension on the filesystem, as all
+extensions must be registered explicitly to be available in your templates.
+
+You can register an extension by using the ``addExtension()`` method on your
+main ``Environment`` object::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addExtension(new Project_Twig_Extension());
+
+Of course, you need to first load the extension file by either using
+``require_once()`` or by using an autoloader (see `spl_autoload_register()`_).
+
+.. tip::
+
+    The bundled extensions are great examples of how extensions work.
+
+Globals
+~~~~~~~
+
+Global variables can be registered in an extension via the ``getGlobals()``
+method::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getGlobals()
+        {
+            return array(
+                'text' => new Text(),
+            );
+        }
+
+        // ...
+    }
+
+Functions
+~~~~~~~~~
+
+Functions can be registered in an extension via the ``getFunctions()``
+method::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getFunctions()
+        {
+            return array(
+                'lipsum' => new Twig_Function_Function('generate_lipsum'),
+            );
+        }
+
+        // ...
+    }
+
+Filters
+~~~~~~~
+
+To add a filter to an extension, you need to override the ``getFilters()``
+method. This method must return an array of filters to add to the Twig
+environment::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getFilters()
+        {
+            return array(
+                'rot13' => new Twig_Filter_Function('str_rot13'),
+            );
+        }
+
+        // ...
+    }
+
+As you can see in the above code, the ``getFilters()`` method returns an array
+where keys are the name of the filters (``rot13``) and the values the
+definition of the filter (``new Twig_Filter_Function('str_rot13')``).
+
+As seen in the previous chapter, you can also define filters as static methods
+on the extension class::
+
+$twig->addFilter('rot13', new Twig_Filter_Function('Project_Twig_Extension::rot13Filter'));
+
+You can also use ``Twig_Filter_Method`` instead of ``Twig_Filter_Function``
+when defining a filter to use a method::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getFilters()
+        {
+            return array(
+                'rot13' => new Twig_Filter_Method($this, 'rot13Filter'),
+            );
+        }
+
+        public function rot13Filter($string)
+        {
+            return str_rot13($string);
+        }
+
+        // ...
+    }
+
+The first argument of the ``Twig_Filter_Method`` constructor is always
+``$this``, the current extension object. The second one is the name of the
+method to call.
+
+Using methods for filters is a great way to package your filter without
+polluting the global namespace. This also gives the developer more flexibility
+at the cost of a small overhead.
+
+Overriding default Filters
+..........................
+
+If some default core filters do not suit your needs, you can easily override
+them by creating your own extension. Just use the same names as the one you
+want to override::
+
+    class MyCoreExtension extends Twig_Extension
+    {
+        public function getFilters()
+        {
+            return array(
+                'date' => new Twig_Filter_Method($this, 'dateFilter'),
+                // ...
+            );
+        }
+
+        public function dateFilter($timestamp, $format = 'F j, Y H:i')
+        {
+            return '...'.twig_date_format_filter($timestamp, $format);
+        }
+
+        public function getName()
+        {
+            return 'project';
+        }
+    }
+
+Here, we override the ``date`` filter with a custom one. Using this extension
+is as simple as registering the ``MyCoreExtension`` extension by calling the
+``addExtension()`` method on the environment instance::
+
+    $twig = new Twig_Environment($loader);
+    $twig->addExtension(new MyCoreExtension());
+
+Tags
+~~~~
+
+Adding a tag in an extension can be done by overriding the
+``getTokenParsers()`` method. This method must return an array of tags to add
+to the Twig environment::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getTokenParsers()
+        {
+            return array(new Project_Set_TokenParser());
+        }
+
+        // ...
+    }
+
+In the above code, we have added a single new tag, defined by the
+``Project_Set_TokenParser`` class. The ``Project_Set_TokenParser`` class is
+responsible for parsing the tag and compiling it to PHP.
+
+Operators
+~~~~~~~~~
+
+The ``getOperators()`` methods allows to add new operators. Here is how to add
+``!``, ``||``, and ``&&`` operators::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getOperators()
+        {
+            return array(
+                array(
+                    '!' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Not'),
+                ),
+                array(
+                    '||' => array('precedence' => 10, 'class' => 'Twig_Node_Expression_Binary_Or', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                    '&&' => array('precedence' => 15, 'class' => 'Twig_Node_Expression_Binary_And', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                ),
+            );
+        }
+
+        // ...
+    }
+
+Tests
+~~~~~
+
+The ``getTests()`` methods allows to add new test functions::
+
+    class Project_Twig_Extension extends Twig_Extension
+    {
+        public function getTests()
+        {
+            return array(
+                'even' => new Twig_Test_Function('twig_test_even'),
+            );
+        }
+
+        // ...
+    }
+
+Testing an Extension
+--------------------
+
+.. versionadded:: 1.10
+    Support for functional tests was added in Twig 1.10.
+
+Functional Tests
+~~~~~~~~~~~~~~~~
+
+You can create functional tests for extensions simply by creating the
+following file structure in your test directory::
+
+    Fixtures/
+        filters/
+            foo.test
+            bar.test
+        functions/
+            foo.test
+            bar.test
+        tags/
+            foo.test
+            bar.test
+    IntegrationTest.php
+
+The ``IntegrationTest.php`` file should look like this::
+
+    class Project_Tests_IntegrationTest extends Twig_Test_IntegrationTestCase
+    {
+        public function getExtensions()
+        {
+            return array(
+                new Project_Twig_Extension1(),
+                new Project_Twig_Extension2(),
+            );
+        }
+
+        public function getFixturesDir()
+        {
+            return dirname(__FILE__).'/Fixtures/';
+        }
+    }
+
+Fixtures examples can be found within the Twig repository
+`tests/Twig/Fixtures`_ directory.
+
+Node Tests
+~~~~~~~~~~
+
+Testing the node visitors can be complex, so extend your test cases from
+``Twig_Test_NodeTestCase``. Examples can be found in the Twig repository
+`tests/Twig/Node`_ directory.
+
+.. _`spl_autoload_register()`: http://www.php.net/spl_autoload_register
+.. _`rot13`:                   http://www.php.net/manual/en/function.str-rot13.php
+.. _`tests/Twig/Fixtures`:     https://github.com/fabpot/Twig/tree/master/test/Twig/Tests/Fixtures
+.. _`tests/Twig/Node`:         https://github.com/fabpot/Twig/tree/master/test/Twig/Tests/Node
diff --git a/vendor/twig/twig/doc/api.rst b/vendor/twig/twig/doc/api.rst
new file mode 100644
index 00000000..cbccb0f7
--- /dev/null
+++ b/vendor/twig/twig/doc/api.rst
@@ -0,0 +1,529 @@
+Twig for Developers
+===================
+
+This chapter describes the API to Twig and not the template language. It will
+be most useful as reference to those implementing the template interface to
+the application and not those who are creating Twig templates.
+
+Basics
+------
+
+Twig uses a central object called the **environment** (of class
+``Twig_Environment``). Instances of this class are used to store the
+configuration and extensions, and are used to load templates from the file
+system or other locations.
+
+Most applications will create one ``Twig_Environment`` object on application
+initialization and use that to load templates. In some cases it's however
+useful to have multiple environments side by side, if different configurations
+are in use.
+
+The simplest way to configure Twig to load templates for your application
+looks roughly like this::
+
+    require_once '/path/to/lib/Twig/Autoloader.php';
+    Twig_Autoloader::register();
+
+    $loader = new Twig_Loader_Filesystem('/path/to/templates');
+    $twig = new Twig_Environment($loader, array(
+        'cache' => '/path/to/compilation_cache',
+    ));
+
+This will create a template environment with the default settings and a loader
+that looks up the templates in the ``/path/to/templates/`` folder. Different
+loaders are available and you can also write your own if you want to load
+templates from a database or other resources.
+
+.. note::
+
+    Notice that the second argument of the environment is an array of options.
+    The ``cache`` option is a compilation cache directory, where Twig caches
+    the compiled templates to avoid the parsing phase for sub-sequent
+    requests. It is very different from the cache you might want to add for
+    the evaluated templates. For such a need, you can use any available PHP
+    cache library.
+
+To load a template from this environment you just have to call the
+``loadTemplate()`` method which then returns a ``Twig_Template`` instance::
+
+    $template = $twig->loadTemplate('index.html');
+
+To render the template with some variables, call the ``render()`` method::
+
+    echo $template->render(array('the' => 'variables', 'go' => 'here'));
+
+.. note::
+
+    The ``display()`` method is a shortcut to output the template directly.
+
+You can also load and render the template in one fell swoop::
+
+    echo $twig->render('index.html', array('the' => 'variables', 'go' => 'here'));
+
+.. _environment_options:
+
+Environment Options
+-------------------
+
+When creating a new ``Twig_Environment`` instance, you can pass an array of
+options as the constructor second argument::
+
+    $twig = new Twig_Environment($loader, array('debug' => true));
+
+The following options are available:
+
+* ``debug``: When set to ``true``, the generated templates have a
+  ``__toString()`` method that you can use to display the generated nodes
+  (default to ``false``).
+
+* ``charset``: The charset used by the templates (default to ``utf-8``).
+
+* ``base_template_class``: The base template class to use for generated
+  templates (default to ``Twig_Template``).
+
+* ``cache``: An absolute path where to store the compiled templates, or
+  ``false`` to disable caching (which is the default).
+
+* ``auto_reload``: When developing with Twig, it's useful to recompile the
+  template whenever the source code changes. If you don't provide a value for
+  the ``auto_reload`` option, it will be determined automatically based on the
+  ``debug`` value.
+
+* ``strict_variables``: If set to ``false``, Twig will silently ignore invalid
+  variables (variables and or attributes/methods that do not exist) and
+  replace them with a ``null`` value. When set to ``true``, Twig throws an
+  exception instead (default to ``false``).
+
+* ``autoescape``: If set to ``true``, auto-escaping will be enabled by default
+  for all templates (default to ``true``). As of Twig 1.8, you can set the
+  escaping strategy to use (``html``, ``js``, ``false`` to disable).
+  As of Twig 1.9, you can set the escaping strategy to use (``css``, ``url``, 
+  ``html_attr``, or a PHP callback that takes the template "filename" and must 
+  return the escaping strategy to use -- the callback cannot be a function name
+  to avoid collision with built-in escaping strategies).
+
+* ``optimizations``: A flag that indicates which optimizations to apply
+  (default to ``-1`` -- all optimizations are enabled; set it to ``0`` to
+  disable).
+
+Loaders
+-------
+
+Loaders are responsible for loading templates from a resource such as the file
+system.
+
+Compilation Cache
+~~~~~~~~~~~~~~~~~
+
+All template loaders can cache the compiled templates on the filesystem for
+future reuse. It speeds up Twig a lot as templates are only compiled once; and
+the performance boost is even larger if you use a PHP accelerator such as APC.
+See the ``cache`` and ``auto_reload`` options of ``Twig_Environment`` above
+for more information.
+
+Built-in Loaders
+~~~~~~~~~~~~~~~~
+
+Here is a list of the built-in loaders Twig provides:
+
+``Twig_Loader_Filesystem``
+..........................
+
+.. versionadded:: 1.10
+    The ``prependPath()`` and support for namespaces were added in Twig 1.10.
+
+``Twig_Loader_Filesystem`` loads templates from the file system. This loader
+can find templates in folders on the file system and is the preferred way to
+load them::
+
+    $loader = new Twig_Loader_Filesystem($templateDir);
+
+It can also look for templates in an array of directories::
+
+    $loader = new Twig_Loader_Filesystem(array($templateDir1, $templateDir2));
+
+With such a configuration, Twig will first look for templates in
+``$templateDir1`` and if they do not exist, it will fallback to look for them
+in the ``$templateDir2``.
+
+You can add or prepend paths via the ``addPath()`` and ``prependPath()``
+methods::
+
+    $loader->addPath($templateDir3);
+    $loader->prependPath($templateDir4);
+
+The filesystem loader also supports namespaced templates. This allows to group
+your templates under different namespaces which have their own template paths.
+
+When using the ``setPaths()``, ``addPath()``, and ``prependPath()`` methods,
+specify the namespace as the second argument (when not specified, these
+methods act on the "main" namespace)::
+
+    $loader->addPath($templateDir, 'admin');
+
+Namespaced templates can be accessed via the special
+``@namespace_name/template_path`` notation::
+
+    $twig->render('@admin/index.html', array());
+
+``Twig_Loader_String``
+......................
+
+``Twig_Loader_String`` loads templates from strings. It's a dummy loader as
+the template reference is the template source code::
+
+    $loader = new Twig_Loader_String();
+    $twig = new Twig_Environment($loader);
+
+    echo $twig->render('Hello {{ name }}!', array('name' => 'Fabien'));
+
+This loader should only be used for unit testing as it has severe limitations:
+several tags, like ``extends`` or ``include`` do not make sense to use as the
+reference to the template is the template source code itself.
+
+``Twig_Loader_Array``
+.....................
+
+``Twig_Loader_Array`` loads a template from a PHP array. It's passed an array
+of strings bound to template names::
+
+    $loader = new Twig_Loader_Array(array(
+        'index.html' => 'Hello {{ name }}!',
+    ));
+    $twig = new Twig_Environment($loader);
+
+    echo $twig->render('index.html', array('name' => 'Fabien'));
+
+This loader is very useful for unit testing. It can also be used for small
+projects where storing all templates in a single PHP file might make sense.
+
+.. tip::
+
+    When using the ``Array`` or ``String`` loaders with a cache mechanism, you
+    should know that a new cache key is generated each time a template content
+    "changes" (the cache key being the source code of the template). If you
+    don't want to see your cache grows out of control, you need to take care
+    of clearing the old cache file by yourself.
+
+``Twig_Loader_Chain``
+.....................
+
+``Twig_Loader_Chain`` delegates the loading of templates to other loaders::
+
+    $loader1 = new Twig_Loader_Array(array(
+        'base.html' => '{% block content %}{% endblock %}',
+    ));
+    $loader2 = new Twig_Loader_Array(array(
+        'index.html' => '{% extends "base.twig" %}{% block content %}Hello {{ name }}{% endblock %}',
+        'base.html'  => 'Will never be loaded',
+    ));
+
+    $loader = new Twig_Loader_Chain(array($loader1, $loader2));
+
+    $twig = new Twig_Environment($loader);
+
+When looking for a template, Twig will try each loader in turn and it will
+return as soon as the template is found. When rendering the ``index.html``
+template from the above example, Twig will load it with ``$loader2`` but the
+``base.html`` template will be loaded from ``$loader1``.
+
+``Twig_Loader_Chain`` accepts any loader that implements
+``Twig_LoaderInterface``.
+
+.. note::
+
+    You can also add loaders via the ``addLoader()`` method.
+
+Create your own Loader
+~~~~~~~~~~~~~~~~~~~~~~
+
+All loaders implement the ``Twig_LoaderInterface``::
+
+    interface Twig_LoaderInterface
+    {
+        /**
+         * Gets the source code of a template, given its name.
+         *
+         * @param  string $name string The name of the template to load
+         *
+         * @return string The template source code
+         */
+        function getSource($name);
+
+        /**
+         * Gets the cache key to use for the cache for a given template name.
+         *
+         * @param  string $name string The name of the template to load
+         *
+         * @return string The cache key
+         */
+        function getCacheKey($name);
+
+        /**
+         * Returns true if the template is still fresh.
+         *
+         * @param string    $name The template name
+         * @param timestamp $time The last modification time of the cached template
+         */
+        function isFresh($name, $time);
+    }
+
+As an example, here is how the built-in ``Twig_Loader_String`` reads::
+
+    class Twig_Loader_String implements Twig_LoaderInterface
+    {
+        public function getSource($name)
+        {
+          return $name;
+        }
+
+        public function getCacheKey($name)
+        {
+          return $name;
+        }
+
+        public function isFresh($name, $time)
+        {
+          return false;
+        }
+    }
+
+The ``isFresh()`` method must return ``true`` if the current cached template
+is still fresh, given the last modification time, or ``false`` otherwise.
+
+.. tip::
+
+    As of Twig 1.11.0, you can also implement ``Twig_ExistsLoaderInterface``
+    to make your loader faster when used with the chain loader.
+
+Using Extensions
+----------------
+
+Twig extensions are packages that add new features to Twig. Using an
+extension is as simple as using the ``addExtension()`` method::
+
+    $twig->addExtension(new Twig_Extension_Sandbox());
+
+Twig comes bundled with the following extensions:
+
+* *Twig_Extension_Core*: Defines all the core features of Twig.
+
+* *Twig_Extension_Escaper*: Adds automatic output-escaping and the possibility
+  to escape/unescape blocks of code.
+
+* *Twig_Extension_Sandbox*: Adds a sandbox mode to the default Twig
+  environment, making it safe to evaluate untrusted code.
+
+* *Twig_Extension_Optimizer*: Optimizes the node tree before compilation.
+
+The core, escaper, and optimizer extensions do not need to be added to the
+Twig environment, as they are registered by default.
+
+Built-in Extensions
+-------------------
+
+This section describes the features added by the built-in extensions.
+
+.. tip::
+
+    Read the chapter about extending Twig to learn how to create your own
+    extensions.
+
+Core Extension
+~~~~~~~~~~~~~~
+
+The ``core`` extension defines all the core features of Twig:
+
+* :doc:`Tags <tags/index>`;
+* :doc:`Filters <filters/index>`;
+* :doc:`Functions <functions/index>`;
+* :doc:`Tests <tests/index>`.
+
+Escaper Extension
+~~~~~~~~~~~~~~~~~
+
+The ``escaper`` extension adds automatic output escaping to Twig. It defines a
+tag, ``autoescape``, and a filter, ``raw``.
+
+When creating the escaper extension, you can switch on or off the global
+output escaping strategy::
+
+    $escaper = new Twig_Extension_Escaper('html');
+    $twig->addExtension($escaper);
+
+If set to ``html``, all variables in templates are escaped (using the ``html``
+escaping strategy), except those using the ``raw`` filter:
+
+.. code-block:: jinja
+
+    {{ article.to_html|raw }}
+
+You can also change the escaping mode locally by using the ``autoescape`` tag
+(see the :doc:`autoescape<tags/autoescape>` doc for the syntax used before
+Twig 1.8):
+
+.. code-block:: jinja
+
+    {% autoescape 'html' %}
+        {{ var }}
+        {{ var|raw }}      {# var won't be escaped #}
+        {{ var|escape }}   {# var won't be double-escaped #}
+    {% endautoescape %}
+
+.. warning::
+
+    The ``autoescape`` tag has no effect on included files.
+
+The escaping rules are implemented as follows:
+
+* Literals (integers, booleans, arrays, ...) used in the template directly as
+  variables or filter arguments are never automatically escaped:
+
+  .. code-block:: jinja
+
+        {{ "Twig<br />" }} {# won't be escaped #}
+
+        {% set text = "Twig<br />" %}
+        {{ text }} {# will be escaped #}
+
+* Expressions which the result is always a literal or a variable marked safe
+  are never automatically escaped:
+
+  .. code-block:: jinja
+
+        {{ foo ? "Twig<br />" : "<br />Twig" }} {# won't be escaped #}
+
+        {% set text = "Twig<br />" %}
+        {{ foo ? text : "<br />Twig" }} {# will be escaped #}
+
+        {% set text = "Twig<br />" %}
+        {{ foo ? text|raw : "<br />Twig" }} {# won't be escaped #}
+
+        {% set text = "Twig<br />" %}
+        {{ foo ? text|escape : "<br />Twig" }} {# the result of the expression won't be escaped #}
+
+* Escaping is applied before printing, after any other filter is applied:
+
+  .. code-block:: jinja
+
+        {{ var|upper }} {# is equivalent to {{ var|upper|escape }} #}
+
+* The `raw` filter should only be used at the end of the filter chain:
+
+  .. code-block:: jinja
+
+        {{ var|raw|upper }} {# will be escaped #}
+
+        {{ var|upper|raw }} {# won't be escaped #}
+
+* Automatic escaping is not applied if the last filter in the chain is marked
+  safe for the current context (e.g. ``html`` or ``js``). ``escaper`` and
+  ``escaper('html')`` are marked safe for html, ``escaper('js')`` is marked
+  safe for javascript, ``raw`` is marked safe for everything.
+
+  .. code-block:: jinja
+
+        {% autoescape 'js' %}
+            {{ var|escape('html') }} {# will be escaped for html and javascript #}
+            {{ var }} {# will be escaped for javascript #}
+            {{ var|escape('js') }} {# won't be double-escaped #}
+        {% endautoescape %}
+
+.. note::
+
+    Note that autoescaping has some limitations as escaping is applied on
+    expressions after evaluation. For instance, when working with
+    concatenation, ``{{ foo|raw ~ bar }}`` won't give the expected result as
+    escaping is applied on the result of the concatenation, not on the
+    individual variables (so, the ``raw`` filter won't have any effect here).
+
+Sandbox Extension
+~~~~~~~~~~~~~~~~~
+
+The ``sandbox`` extension can be used to evaluate untrusted code. Access to
+unsafe attributes and methods is prohibited. The sandbox security is managed
+by a policy instance. By default, Twig comes with one policy class:
+``Twig_Sandbox_SecurityPolicy``. This class allows you to white-list some
+tags, filters, properties, and methods::
+
+    $tags = array('if');
+    $filters = array('upper');
+    $methods = array(
+        'Article' => array('getTitle', 'getBody'),
+    );
+    $properties = array(
+        'Article' => array('title', 'body'),
+    );
+    $functions = array('range');
+    $policy = new Twig_Sandbox_SecurityPolicy($tags, $filters, $methods, $properties, $functions);
+
+With the previous configuration, the security policy will only allow usage of
+the ``if`` tag, and the ``upper`` filter. Moreover, the templates will only be
+able to call the ``getTitle()`` and ``getBody()`` methods on ``Article``
+objects, and the ``title`` and ``body`` public properties. Everything else
+won't be allowed and will generate a ``Twig_Sandbox_SecurityError`` exception.
+
+The policy object is the first argument of the sandbox constructor::
+
+    $sandbox = new Twig_Extension_Sandbox($policy);
+    $twig->addExtension($sandbox);
+
+By default, the sandbox mode is disabled and should be enabled when including
+untrusted template code by using the ``sandbox`` tag:
+
+.. code-block:: jinja
+
+    {% sandbox %}
+        {% include 'user.html' %}
+    {% endsandbox %}
+
+You can sandbox all templates by passing ``true`` as the second argument of
+the extension constructor::
+
+    $sandbox = new Twig_Extension_Sandbox($policy, true);
+
+Optimizer Extension
+~~~~~~~~~~~~~~~~~~~
+
+The ``optimizer`` extension optimizes the node tree before compilation::
+
+    $twig->addExtension(new Twig_Extension_Optimizer());
+
+By default, all optimizations are turned on. You can select the ones you want
+to enable by passing them to the constructor::
+
+    $optimizer = new Twig_Extension_Optimizer(Twig_NodeVisitor_Optimizer::OPTIMIZE_FOR);
+
+    $twig->addExtension($optimizer);
+
+Twig supports the following optimizations:
+
+* ``Twig_NodeVisitor_Optimizer::OPTIMIZE_ALL``, enables all optimizations
+  (this is the default value).
+* ``Twig_NodeVisitor_Optimizer::OPTIMIZE_NONE``, disables all optimizations.
+  This reduces the compilation time, but it can increase the execution time
+  and the consumed memory.
+* ``Twig_NodeVisitor_Optimizer::OPTIMIZE_FOR``, optimizes the ``for`` tag by
+  removing the ``loop`` variable creation whenever possible.
+* ``Twig_NodeVisitor_Optimizer::OPTIMIZE_RAW_FILTER``, removes the ``raw``
+  filter whenever possible.
+* ``Twig_NodeVisitor_Optimizer::OPTIMIZE_VAR_ACCESS``, simplifies the creation
+  and access of variables in the compiled templates whenever possible.
+
+Exceptions
+----------
+
+Twig can throw exceptions:
+
+* ``Twig_Error``: The base exception for all errors.
+
+* ``Twig_Error_Syntax``: Thrown to tell the user that there is a problem with
+  the template syntax.
+
+* ``Twig_Error_Runtime``: Thrown when an error occurs at runtime (when a filter
+  does not exist for instance).
+
+* ``Twig_Error_Loader``: Thrown when an error occurs during template loading.
+
+* ``Twig_Sandbox_SecurityError``: Thrown when an unallowed tag, filter, or
+  method is called in a sandboxed template.
diff --git a/vendor/twig/twig/doc/coding_standards.rst b/vendor/twig/twig/doc/coding_standards.rst
new file mode 100644
index 00000000..e0aab35e
--- /dev/null
+++ b/vendor/twig/twig/doc/coding_standards.rst
@@ -0,0 +1,101 @@
+Coding Standards
+================
+
+When writing Twig templates, we recommend you to follow these official coding
+standards:
+
+* Put one (and only one) space after the start of a delimiter (``{{``, ``{%``,
+  and ``{#``) and before the end of a delimiter (``}}``, ``%}``, and ``#}``):
+
+  .. code-block:: jinja
+
+    {{ foo }}
+    {# comment #}
+    {% if foo %}{% endif %}
+
+  When using the whitespace control character, do not put any spaces between
+  it and the delimiter:
+
+  .. code-block:: jinja
+
+    {{- foo -}}
+    {#- comment -#}
+    {%- if foo -%}{%- endif -%}
+
+* Put one (and only one) space before and after the following operators:
+  comparison operators (``==``, ``!=``, ``<``, ``>``, ``>=``, ``<=``), math
+  operators (``+``, ``-``, ``/``, ``*``, ``%``, ``//``, ``**``), logic
+  operators (``not``, ``and``, ``or``), ``~``, ``is``, ``in``, and the ternary
+  operator (``?:``):
+
+  .. code-block:: jinja
+
+     {{ 1 + 2 }}
+     {{ foo ~ bar }}
+     {{ true ? true : false }}
+
+* Put one (and only one) space after the ``:`` sign in hashes and ``,`` in
+  arrays and hashes:
+
+  .. code-block:: jinja
+
+     {{ [1, 2, 3] }}
+     {{ {'foo': 'bar'} }}
+
+* Do not put any spaces after an opening parenthesis and before a closing
+  parenthesis in expressions:
+
+  .. code-block:: jinja
+
+    {{ 1 + (2 * 3) }}
+
+* Do not put any spaces before and after string delimiters:
+
+  .. code-block:: jinja
+
+    {{ 'foo' }}
+    {{ "foo" }}
+
+* Do not put any spaces before and after the following operators: ``|``,
+  ``.``, ``..``, ``[]``:
+
+  .. code-block:: jinja
+
+    {{ foo|upper|lower }}
+    {{ user.name }}
+    {{ user[name] }}
+    {% for i in 1..12 %}{% endfor %}
+
+* Do not put any spaces before and after the parenthesis used for filter and
+  function calls:
+
+  .. code-block:: jinja
+
+     {{ foo|default('foo') }}
+     {{ range(1..10) }}
+
+* Do not put any spaces before and after the opening and the closing of arrays
+  and hashes:
+
+  .. code-block:: jinja
+
+     {{ [1, 2, 3] }}
+     {{ {'foo': 'bar'} }}
+
+* Use lower cased and underscored variable names:
+
+  .. code-block:: jinja
+
+     {% set foo = 'foo' %}
+     {% set foo_bar = 'foo' %}
+
+* Indent your code inside tags (use the same indentation as the one used for
+  the main language of the file):
+
+  .. code-block:: jinja
+
+     {% block foo %}
+        {% if true %}
+            true
+        {% endif %}
+     {% endblock %}
diff --git a/vendor/twig/twig/doc/deprecated.rst b/vendor/twig/twig/doc/deprecated.rst
new file mode 100644
index 00000000..f0a3a0f0
--- /dev/null
+++ b/vendor/twig/twig/doc/deprecated.rst
@@ -0,0 +1,98 @@
+Deprecated Features
+===================
+
+This document lists all deprecated features in Twig. Deprecated features are
+kept for backward compatibility and removed in the next major release (a
+feature that was deprecated in Twig 1.x is removed in Twig 2.0).
+
+Token Parsers
+-------------
+
+* As of Twig 1.x, the token parser broker sub-system is deprecated. The
+  following class and interface will be removed in 2.0:
+
+  * ``Twig_TokenParserBrokerInterface``
+  * ``Twig_TokenParserBroker``
+
+Extensions
+----------
+
+* As of Twig 1.x, the ability to remove an extension is deprecated and the
+  ``Twig_Environment::removeExtension()`` method will be removed in 2.0.
+
+PEAR
+----
+
+PEAR support will be discontinued in Twig 2.0, and no PEAR packages will be
+provided. Use Composer instead.
+
+Filters
+-------
+
+* As of Twig 1.x, use ``Twig_SimpleFilter`` to add a filter. The following
+  classes and interfaces will be removed in 2.0:
+
+  * ``Twig_FilterInterface``
+  * ``Twig_FilterCallableInterface``
+  * ``Twig_Filter``
+  * ``Twig_Filter_Function``
+  * ``Twig_Filter_Method``
+  * ``Twig_Filter_Node``
+
+* As of Twig 2.x, the ``Twig_SimpleFilter`` class is deprecated and will be
+  removed in Twig 3.x (use ``Twig_Filter`` instead). In Twig 2.x,
+  ``Twig_SimpleFilter`` is just an alias for ``Twig_Filter``.
+
+Functions
+---------
+
+* As of Twig 1.x, use ``Twig_SimpleFunction`` to add a function. The following
+  classes and interfaces will be removed in 2.0:
+
+  * ``Twig_FunctionInterface``
+  * ``Twig_FunctionCallableInterface``
+  * ``Twig_Function``
+  * ``Twig_Function_Function``
+  * ``Twig_Function_Method``
+  * ``Twig_Function_Node``
+
+* As of Twig 2.x, the ``Twig_SimpleFunction`` class is deprecated and will be
+  removed in Twig 3.x (use ``Twig_Function`` instead). In Twig 2.x,
+  ``Twig_SimpleFunction`` is just an alias for ``Twig_Function``.
+
+Tests
+-----
+
+* As of Twig 1.x, use ``Twig_SimpleTest`` to add a test. The following classes
+  and interfaces will be removed in 2.0:
+
+  * ``Twig_TestInterface``
+  * ``Twig_TestCallableInterface``
+  * ``Twig_Test``
+  * ``Twig_Test_Function``
+  * ``Twig_Test_Method``
+  * ``Twig_Test_Node``
+
+* As of Twig 2.x, the ``Twig_SimpleTest`` class is deprecated and will be
+  removed in Twig 3.x (use ``Twig_Test`` instead). In Twig 2.x,
+  ``Twig_SimpleTest`` is just an alias for ``Twig_Test``.
+
+Interfaces
+----------
+
+* As of Twig 2.x, the following interfaces are deprecated and empty (they will
+  be removed in Twig 3.0):
+
+* ``Twig_CompilerInterface``     (use ``Twig_Compiler`` instead)
+* ``Twig_LexerInterface``        (use ``Twig_Lexer`` instead)
+* ``Twig_NodeInterface``         (use ``Twig_Node`` instead)
+* ``Twig_ParserInterface``       (use ``Twig_Parser`` instead)
+* ``Twig_ExistsLoaderInterface`` (merged with ``Twig_LoaderInterface``)
+* ``Twig_TemplateInterface``     (use ``Twig_Template`` instead)
+
+Globals
+-------
+
+* As of Twig 2.x, the ability to register a global variable after the runtime
+  or the extensions have been initialized is not possible anymore (but
+  changing the value of an already registered global is possible).
diff --git a/vendor/twig/twig/doc/filters/abs.rst b/vendor/twig/twig/doc/filters/abs.rst
new file mode 100644
index 00000000..3a82f62e
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/abs.rst
@@ -0,0 +1,18 @@
+``abs``
+=======
+
+The ``abs`` filter returns the absolute value.
+
+.. code-block:: jinja
+
+    {# number = -5 #}
+    
+    {{ number|abs }}
+    
+    {# outputs 5 #}
+
+.. note::
+
+    Internally, Twig uses the PHP `abs`_ function.
+
+.. _`abs`: http://php.net/abs
diff --git a/vendor/twig/twig/doc/filters/batch.rst b/vendor/twig/twig/doc/filters/batch.rst
new file mode 100644
index 00000000..4366b57b
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/batch.rst
@@ -0,0 +1,45 @@
+``batch``
+=========
+
+.. versionadded:: 1.12.3
+    The batch filter was added in Twig 1.12.3.
+
+The ``batch`` filter "batches" items by returning a list of lists with the
+given number of items. If you provide a second parameter, it is used to fill
+missing items:
+
+.. code-block:: jinja
+
+    {% set items = ['a', 'b', 'c', 'd', 'e', 'f', 'g'] %}
+
+    <table>
+    {% for row in items|batch(3, 'No item') %}
+      <tr>
+      {% for column in row %}
+        <td>{{ column }}</td>
+      {% endfor %}
+      </tr>
+    {% endfor %}
+    </table>
+
+The above example will be rendered as:
+
+.. code-block:: jinja
+
+    <table>
+      <tr>
+          <td>a</td>
+          <td>b</td>
+          <td>c</td>
+        </tr>
+      <tr>
+          <td>d</td>
+          <td>e</td>
+          <td>f</td>
+        </tr>
+      <tr>
+          <td>g</td>
+          <td>No item</td>
+          <td>No item</td>
+        </tr>
+    </table>
diff --git a/vendor/twig/twig/doc/filters/capitalize.rst b/vendor/twig/twig/doc/filters/capitalize.rst
new file mode 100644
index 00000000..10546a1f
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/capitalize.rst
@@ -0,0 +1,11 @@
+``capitalize``
+==============
+
+The ``capitalize`` filter capitalizes a value. The first character will be
+uppercase, all others lowercase:
+
+.. code-block:: jinja
+
+    {{ 'my first car'|capitalize }}
+
+    {# outputs 'My first car' #}
diff --git a/vendor/twig/twig/doc/filters/convert_encoding.rst b/vendor/twig/twig/doc/filters/convert_encoding.rst
new file mode 100644
index 00000000..1b0eb60c
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/convert_encoding.rst
@@ -0,0 +1,28 @@
+``convert_encoding``
+====================
+
+.. versionadded:: 1.4
+    The ``convert_encoding`` filter was added in Twig 1.4.
+
+The ``convert_encoding`` filter converts a string from one encoding to
+another. The first argument is the expected output charset and the second one
+is the input charset:
+
+.. code-block:: jinja
+
+    {{ data|convert_encoding('UTF-8', 'iso-2022-jp') }}
+
+.. note::
+
+    This filter relies on the `iconv`_ or `mbstring`_ extension, so one of
+    them must be installed. In case both are installed, `mbstring`_ is used by
+    default (Twig before 1.8.1 uses `iconv`_ by default).
+
+Arguments
+---------
+
+ * ``from``: The input charset
+ * ``to``:   The output charset
+
+.. _`iconv`:    http://php.net/iconv
+.. _`mbstring`: http://php.net/mbstring
diff --git a/vendor/twig/twig/doc/filters/date.rst b/vendor/twig/twig/doc/filters/date.rst
new file mode 100644
index 00000000..8e2f31fa
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/date.rst
@@ -0,0 +1,88 @@
+``date``
+========
+
+.. versionadded:: 1.1
+    The timezone support has been added in Twig 1.1.
+
+.. versionadded:: 1.5
+    The default date format support has been added in Twig 1.5.
+
+.. versionadded:: 1.6.1
+    The default timezone support has been added in Twig 1.6.1.
+
+.. versionadded:: 1.11.0
+    The introduction of the false value for the timezone was introduced in Twig 1.11.0
+
+The ``date`` filter formats a date to a given format:
+
+.. code-block:: jinja
+
+    {{ post.published_at|date("m/d/Y") }}
+
+The ``date`` filter accepts strings (it must be in a format supported by the
+`strtotime`_ function), `DateTime`_ instances, or `DateInterval`_ instances. For
+instance, to display the current date, filter the word "now":
+
+.. code-block:: jinja
+
+    {{ "now"|date("m/d/Y") }}
+
+To escape words and characters in the date format use ``\\`` in front of each
+character:
+
+.. code-block:: jinja
+
+    {{ post.published_at|date("F jS \\a\\t g:ia") }}
+
+If the value passed to the ``date`` filter is ``null``, it will return the
+current date by default. If an empty string is desired instead of the current
+date, use a ternary operator:
+
+.. code-block:: jinja
+
+    {{ post.published_at is empty ? "" : post.published_at|date("m/d/Y") }}
+
+If no format is provided, Twig will use the default one: ``F j, Y H:i``. This
+default can be easily changed by calling the ``setDateFormat()`` method on the
+``core`` extension instance. The first argument is the default format for
+dates and the second one is the default format for date intervals:
+
+.. code-block:: php
+
+    $twig = new Twig_Environment($loader);
+    $twig->getExtension('core')->setDateFormat('d/m/Y', '%d days');
+
+Timezone
+--------
+
+By default, the date is displayed by applying the default timezone (the one
+specified in php.ini or declared in Twig -- see below), but you can override
+it by explicitly specifying a timezone:
+
+.. code-block:: jinja
+
+    {{ post.published_at|date("m/d/Y", "Europe/Paris") }}
+
+If the date is already a DateTime object, and if you want to keep its current
+timezone, pass ``false`` as the timezone value:
+
+.. code-block:: jinja
+
+    {{ post.published_at|date("m/d/Y", false) }}
+
+The default timezone can also be set globally by calling ``setTimezone()``:
+
+.. code-block:: php
+
+    $twig = new Twig_Environment($loader);
+    $twig->getExtension('core')->setTimezone('Europe/Paris');
+
+Arguments
+---------
+
+ * ``format``:   The date format
+ * ``timezone``: The date timezone
+
+.. _`strtotime`:    http://www.php.net/strtotime
+.. _`DateTime`:     http://www.php.net/DateTime
+.. _`DateInterval`: http://www.php.net/DateInterval
diff --git a/vendor/twig/twig/doc/filters/date_modify.rst b/vendor/twig/twig/doc/filters/date_modify.rst
new file mode 100644
index 00000000..6a5c73d6
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/date_modify.rst
@@ -0,0 +1,23 @@
+``date_modify``
+===============
+
+.. versionadded:: 1.9.0
+    The date_modify filter has been added in Twig 1.9.0.
+
+The ``date_modify`` filter modifies a date with a given modifier string:
+
+.. code-block:: jinja
+
+    {{ post.published_at|date_modify("+1 day")|date("m/d/Y") }}
+
+The ``date_modify`` filter accepts strings (it must be in a format supported
+by the `strtotime`_ function) or `DateTime`_ instances. You can easily combine
+it with the :doc:`date<date>` filter for formatting.
+
+Arguments
+---------
+
+ * ``modifier``: The modifier
+
+.. _`strtotime`: http://www.php.net/strtotime
+.. _`DateTime`:  http://www.php.net/DateTime
diff --git a/vendor/twig/twig/doc/filters/default.rst b/vendor/twig/twig/doc/filters/default.rst
new file mode 100644
index 00000000..46ed9636
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/default.rst
@@ -0,0 +1,33 @@
+``default``
+===========
+
+The ``default`` filter returns the passed default value if the value is
+undefined or empty, otherwise the value of the variable:
+
+.. code-block:: jinja
+
+    {{ var|default('var is not defined') }}
+
+    {{ var.foo|default('foo item on var is not defined') }}
+
+    {{ var['foo']|default('foo item on var is not defined') }}
+
+    {{ ''|default('passed var is empty')  }}
+
+When using the ``default`` filter on an expression that uses variables in some
+method calls, be sure to use the ``default`` filter whenever a variable can be
+undefined:
+
+.. code-block:: jinja
+
+    {{ var.method(foo|default('foo'))|default('foo') }}
+
+.. note::
+
+    Read the documentation for the :doc:`defined<../tests/defined>` and
+    :doc:`empty<../tests/empty>` tests to learn more about their semantics.
+
+Arguments
+---------
+
+ * ``default``: The default value
diff --git a/vendor/twig/twig/doc/filters/escape.rst b/vendor/twig/twig/doc/filters/escape.rst
new file mode 100644
index 00000000..5ade7d74
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/escape.rst
@@ -0,0 +1,93 @@
+``escape``
+==========
+
+.. versionadded:: 1.9.0
+    The ``css``, ``url``, and ``html_attr`` strategies were added in Twig
+    1.9.0.
+
+The ``escape`` filter escapes a string for safe insertion into the final
+output. It supports different escaping strategies depending on the template
+context.
+
+By default, it uses the HTML escaping strategy:
+
+.. code-block:: jinja
+
+    {{ user.username|escape }}
+
+For convenience, the ``e`` filter is defined as an alias:
+
+.. code-block:: jinja
+
+    {{ user.username|e }}
+
+The ``escape`` filter can also be used in other contexts than HTML thanks to
+an optional argument which defines the escaping strategy to use:
+
+.. code-block:: jinja
+
+    {{ user.username|e }}
+    {# is equivalent to #}
+    {{ user.username|e('html') }}
+
+And here is how to escape variables included in JavaScript code:
+
+.. code-block:: jinja
+
+    {{ user.username|escape('js') }}
+    {{ user.username|e('js') }}
+
+The ``escape`` filter supports the following escaping strategies:
+
+* ``html``: escapes a string for the **HTML body** context.
+
+* ``js``: escapes a string for the **JavaScript context**.
+
+* ``css``: escapes a string for the **CSS context**. CSS escaping can be
+  applied to any string being inserted into CSS and escapes everything except
+  alphanumerics.
+
+* ``url``: escapes a string for the **URI or parameter contexts**. This should
+  not be used to escape an entire URI; only a subcomponent being inserted.
+
+* ``html_attr``: escapes a string for the **HTML attribute** context.
+
+.. note::
+
+    Internally, ``escape`` uses the PHP native `htmlspecialchars`_ function
+    for the HTML escaping strategy.
+
+.. caution::
+
+    When using automatic escaping, Twig tries to not double-escape a variable
+    when the automatic escaping strategy is the same as the one applied by the
+    escape filter; but that does not work when using a variable as the
+    escaping strategy:
+
+    .. code-block:: jinja
+
+        {% set strategy = 'html' %}
+
+        {% autoescape 'html' %}
+            {{ var|escape('html') }}   {# won't be double-escaped #}
+            {{ var|escape(strategy) }} {# will be double-escaped #}
+        {% endautoescape %}
+
+    When using a variable as the escaping strategy, you should disable
+    automatic escaping:
+
+    .. code-block:: jinja
+
+        {% set strategy = 'html' %}
+
+        {% autoescape 'html' %}
+            {{ var|escape(strategy)|raw }} {# won't be double-escaped #}
+        {% endautoescape %}
+
+Arguments
+---------
+
+ * ``strategy``: The escaping strategy
+ * ``charset``:  The string charset
+
+.. _`htmlspecialchars`: http://php.net/htmlspecialchars
diff --git a/vendor/twig/twig/doc/filters/first.rst b/vendor/twig/twig/doc/filters/first.rst
new file mode 100644
index 00000000..4295e833
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/first.rst
@@ -0,0 +1,25 @@
+``first``
+=========
+
+.. versionadded:: 1.12.2
+    The first filter was added in Twig 1.12.2.
+
+The ``first`` filter returns the first "element" of a sequence, a mapping, or
+a string:
+
+.. code-block:: jinja
+
+    {{ [1, 2, 3, 4]|first }}
+    {# outputs 1 #}
+
+    {{ { a: 1, b: 2, c: 3, d: 4 }|first }}
+    {# outputs 1 #}
+
+    {{ '1234'|first }}
+    {# outputs 1 #}
+
+.. note::
+
+    It also works with objects implementing the `Traversable`_ interface.
+
+.. _`Traversable`: http://php.net/manual/en/class.traversable.php
diff --git a/vendor/twig/twig/doc/filters/format.rst b/vendor/twig/twig/doc/filters/format.rst
new file mode 100644
index 00000000..fe55a09e
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/format.rst
@@ -0,0 +1,16 @@
+``format``
+==========
+
+The ``format`` filter formats a given string by replacing the placeholders
+(placeholders follows the `sprintf`_ notation):
+
+.. code-block:: jinja
+
+    {{ "I like %s and %s."|format(foo, "bar") }}
+
+    {# returns I like foo and bar
+       if the foo parameter equals to the foo string. #}
+
+.. _`sprintf`: http://www.php.net/sprintf
+
+.. seealso:: :doc:`replace<replace>`
diff --git a/vendor/twig/twig/doc/filters/index.rst b/vendor/twig/twig/doc/filters/index.rst
new file mode 100644
index 00000000..b0c6b38d
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/index.rst
@@ -0,0 +1,36 @@
+Filters
+=======
+
+.. toctree::
+    :maxdepth: 1
+
+    abs
+    batch
+    capitalize
+    convert_encoding
+    date
+    date_modify
+    default
+    escape
+    first
+    format
+    join
+    json_encode
+    keys
+    last
+    length
+    lower
+    nl2br
+    number_format
+    merge
+    upper
+    raw
+    replace
+    reverse
+    slice
+    sort
+    split
+    striptags
+    title
+    trim
+    url_encode
diff --git a/vendor/twig/twig/doc/filters/join.rst b/vendor/twig/twig/doc/filters/join.rst
new file mode 100644
index 00000000..f4952421
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/join.rst
@@ -0,0 +1,23 @@
+``join``
+========
+
+The ``join`` filter returns a string which is the concatenation of the items
+of a sequence:
+
+.. code-block:: jinja
+
+    {{ [1, 2, 3]|join }}
+    {# returns 123 #}
+
+The separator between elements is an empty string per default, but you can
+define it with the optional first parameter:
+
+.. code-block:: jinja
+
+    {{ [1, 2, 3]|join('|') }}
+    {# returns 1|2|3 #}
+
+Arguments
+---------
+
+ * ``glue``: The separator
diff --git a/vendor/twig/twig/doc/filters/json_encode.rst b/vendor/twig/twig/doc/filters/json_encode.rst
new file mode 100644
index 00000000..a33fef1b
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/json_encode.rst
@@ -0,0 +1,21 @@
+``json_encode``
+===============
+
+The ``json_encode`` filter returns the JSON representation of a string:
+
+.. code-block:: jinja
+
+    {{ data|json_encode() }}
+
+.. note::
+
+    Internally, Twig uses the PHP `json_encode`_ function.
+
+Arguments
+---------
+
+ * ``options``: A bitmask of `json_encode options`_ (``{{
+   data|json_encode(constant(JSON_PRETTY_PRINT)) }}``)
+
+.. _`json_encode`: http://php.net/json_encode
+.. _`json_encode options`: http://www.php.net/manual/en/json.constants.php
diff --git a/vendor/twig/twig/doc/filters/keys.rst b/vendor/twig/twig/doc/filters/keys.rst
new file mode 100644
index 00000000..e4f090c6
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/keys.rst
@@ -0,0 +1,11 @@
+``keys``
+========
+
+The ``keys`` filter returns the keys of an array. It is useful when you want to
+iterate over the keys of an array:
+
+.. code-block:: jinja
+
+    {% for key in array|keys %}
+        ...
+    {% endfor %}
diff --git a/vendor/twig/twig/doc/filters/last.rst b/vendor/twig/twig/doc/filters/last.rst
new file mode 100644
index 00000000..723c0b57
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/last.rst
@@ -0,0 +1,25 @@
+``last``
+========
+
+.. versionadded:: 1.12.2
+    The last filter was added in Twig 1.12.2.
+
+The ``last`` filter returns the last "element" of a sequence, a mapping, or
+a string:
+
+.. code-block:: jinja
+
+    {{ [1, 2, 3, 4]|last }}
+    {# outputs 4 #}
+
+    {{ { a: 1, b: 2, c: 3, d: 4 }|last }}
+    {# outputs 4 #}
+
+    {{ '1234'|last }}
+    {# outputs 4 #}
+
+.. note::
+
+    It also works with objects implementing the `Traversable`_ interface.
+
+.. _`Traversable`: http://php.net/manual/en/class.traversable.php
diff --git a/vendor/twig/twig/doc/filters/length.rst b/vendor/twig/twig/doc/filters/length.rst
new file mode 100644
index 00000000..f79b9bdf
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/length.rst
@@ -0,0 +1,12 @@
+``length``
+==========
+
+The ``length`` filters returns the number of items of a sequence or mapping, or
+the length of a string:
+
+.. code-block:: jinja
+
+    {% if users|length > 10 %}
+        ...
+    {% endif %}
+
diff --git a/vendor/twig/twig/doc/filters/lower.rst b/vendor/twig/twig/doc/filters/lower.rst
new file mode 100644
index 00000000..ef9faa90
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/lower.rst
@@ -0,0 +1,10 @@
+``lower``
+=========
+
+The ``lower`` filter converts a value to lowercase:
+
+.. code-block:: jinja
+
+    {{ 'WELCOME'|lower }}
+
+    {# outputs 'welcome' #}
diff --git a/vendor/twig/twig/doc/filters/merge.rst b/vendor/twig/twig/doc/filters/merge.rst
new file mode 100644
index 00000000..05a2ae7d
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/merge.rst
@@ -0,0 +1,41 @@
+``merge``
+=========
+
+The ``merge`` filter merges an array with another array:
+
+.. code-block:: jinja
+
+    {% set values = [1, 2] %}
+
+    {% set values = values|merge(['apple', 'orange']) %}
+
+    {# values now contains [1, 2, 'apple', 'orange'] #}
+
+New values are added at the end of the existing ones.
+
+The ``merge`` filter also works on hashes:
+
+.. code-block:: jinja
+
+    {% set items = { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'unknown' } %}
+
+    {% set items = items|merge({ 'peugeot': 'car', 'renault': 'car' }) %}
+
+    {# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car', 'renault': 'car' } #}
+
+For hashes, the merging process occurs on the keys: if the key does not
+already exist, it is added but if the key already exists, its value is
+overridden.
+
+.. tip::
+
+    If you want to ensure that some values are defined in an array (by given
+    default values), reverse the two elements in the call:
+
+    .. code-block:: jinja
+
+        {% set items = { 'apple': 'fruit', 'orange': 'fruit' } %}
+
+        {% set items = { 'apple': 'unknown' }|merge(items) %}
+
+        {# items now contains { 'apple': 'fruit', 'orange': 'fruit' } #}
diff --git a/vendor/twig/twig/doc/filters/nl2br.rst b/vendor/twig/twig/doc/filters/nl2br.rst
new file mode 100644
index 00000000..694c6724
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/nl2br.rst
@@ -0,0 +1,22 @@
+``nl2br``
+=========
+
+.. versionadded:: 1.5
+    The nl2br filter was added in Twig 1.5.
+
+The ``nl2br`` filter inserts HTML line breaks before all newlines in a string:
+
+.. code-block:: jinja
+
+    {{ "I like Twig.\nYou will like it too."|nl2br }}
+    {# outputs
+
+        I like Twig.<br />
+        You will like it too.
+
+    #}
+
+.. note::
+
+    The ``nl2br`` filter pre-escapes the input before applying the
+    transformation.
diff --git a/vendor/twig/twig/doc/filters/number_format.rst b/vendor/twig/twig/doc/filters/number_format.rst
new file mode 100644
index 00000000..fedacd9d
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/number_format.rst
@@ -0,0 +1,45 @@
+``number_format``
+=================
+
+.. versionadded:: 1.5
+    The number_format filter was added in Twig 1.5
+
+The ``number_format`` filter formats numbers.  It is a wrapper around PHP's
+`number_format`_ function:
+
+.. code-block:: jinja
+
+    {{ 200.35|number_format }}
+
+You can control the number of decimal places, decimal point, and thousands
+separator using the additional arguments:
+
+.. code-block:: jinja
+
+    {{ 9800.333|number_format(2, '.', ',') }}
+
+If no formatting options are provided then Twig will use the default formatting
+options of:
+
+- 0 decimal places.
+- ``.`` as the decimal point.
+- ``,`` as the thousands separator.
+
+These defaults can be easily changed through the core extension:
+
+.. code-block:: php
+
+    $twig = new Twig_Environment($loader);
+    $twig->getExtension('core')->setNumberFormat(3, '.', ',');
+
+The defaults set for ``number_format`` can be over-ridden upon each call using the
+additional parameters.
+
+Arguments
+---------
+
+ * ``decimal``:       The number of decimal points to display
+ * ``decimal_point``: The character(s) to use for the decimal point
+ * ``decimal_sep``:   The character(s) to use for the thousands separator
+
+.. _`number_format`: http://php.net/number_format
diff --git a/vendor/twig/twig/doc/filters/raw.rst b/vendor/twig/twig/doc/filters/raw.rst
new file mode 100644
index 00000000..434dd246
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/raw.rst
@@ -0,0 +1,12 @@
+``raw``
+=======
+
+The ``raw`` filter marks the value as being "safe", which means that in an
+environment with automatic escaping enabled this variable will not be escaped
+if ``raw`` is the last filter applied to it:
+
+.. code-block:: jinja
+
+    {% autoescape true %}
+        {{ var|raw }} {# var won't be escaped #}
+    {% endautoescape %}
diff --git a/vendor/twig/twig/doc/filters/replace.rst b/vendor/twig/twig/doc/filters/replace.rst
new file mode 100644
index 00000000..e961f23d
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/replace.rst
@@ -0,0 +1,19 @@
+``replace``
+===========
+
+The ``replace`` filter formats a given string by replacing the placeholders
+(placeholders are free-form):
+
+.. code-block:: jinja
+
+    {{ "I like %this% and %that%."|replace({'%this%': foo, '%that%': "bar"}) }}
+
+    {# returns I like foo and bar
+       if the foo parameter equals to the foo string. #}
+
+Arguments
+---------
+
+ * ``replace_pairs``: The placeholder values
+
+.. seealso:: :doc:`format<format>`
diff --git a/vendor/twig/twig/doc/filters/reverse.rst b/vendor/twig/twig/doc/filters/reverse.rst
new file mode 100644
index 00000000..752192b8
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/reverse.rst
@@ -0,0 +1,47 @@
+``reverse``
+===========
+
+.. versionadded:: 1.6
+    Support for strings has been added in Twig 1.6.
+
+The ``reverse`` filter reverses a sequence, a mapping, or a string:
+
+.. code-block:: jinja
+
+    {% for user in users|reverse %}
+        ...
+    {% endfor %}
+
+    {{ '1234'|reverse }}
+
+    {# outputs 4321 #}
+
+.. tip::
+
+    For sequences and mappings, numeric keys are not preserved. To reverse
+    them as well, pass ``true`` as an argument to the ``reverse`` filter:
+
+    .. code-block:: jinja
+
+        {% for key, value in {1: "a", 2: "b", 3: "c"}|reverse %}
+            {{ key }}: {{ value }}
+        {%- endfor %}
+
+        {# output: 0: c    1: b    2: a #}
+
+        {% for key, value in {1: "a", 2: "b", 3: "c"}|reverse(true) %}
+            {{ key }}: {{ value }}
+        {%- endfor %}
+
+        {# output: 3: c    2: b    1: a #}
+
+.. note::
+
+    It also works with objects implementing the `Traversable`_ interface.
+
+Arguments
+---------
+
+ * ``preserve_keys``: Preserve keys when reversing a mapping or a sequence.
+
+.. _`Traversable`: http://php.net/Traversable
diff --git a/vendor/twig/twig/doc/filters/slice.rst b/vendor/twig/twig/doc/filters/slice.rst
new file mode 100644
index 00000000..dbd5db37
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/slice.rst
@@ -0,0 +1,70 @@
+``slice``
+===========
+
+.. versionadded:: 1.6
+    The slice filter was added in Twig 1.6.
+
+The ``slice`` filter extracts a slice of a sequence, a mapping, or a string:
+
+.. code-block:: jinja
+
+    {% for i in [1, 2, 3, 4, 5]|slice(1, 2) %}
+        {# will iterate over 2 and 3 #}
+    {% endfor %}
+
+    {{ '12345'|slice(1, 2) }}
+
+    {# outputs 23 #}
+
+You can use any valid expression for both the start and the length:
+
+.. code-block:: jinja
+
+    {% for i in [1, 2, 3, 4, 5]|slice(start, length) %}
+        {# ... #}
+    {% endfor %}
+
+As syntactic sugar, you can also use the ``[]`` notation:
+
+.. code-block:: jinja
+
+    {% for i in [1, 2, 3, 4, 5][start:length] %}
+        {# ... #}
+    {% endfor %}
+
+    {{ '12345'[1:2] }}
+
+    {# you can omit the first argument -- which is the same as 0 #}
+    {{ '12345'[:2] }} {# will display "12" #}
+
+    {# you can omit the last argument -- which will select everything till the end #}
+    {{ '12345'[2:] }} {# will display "345" #}
+
+The ``slice`` filter works as the `array_slice`_ PHP function for arrays and
+`substr`_ for strings.
+
+If the start is non-negative, the sequence will start at that start in the
+variable. If start is negative, the sequence will start that far from the end
+of the variable.
+
+If length is given and is positive, then the sequence will have up to that
+many elements in it. If the variable is shorter than the length, then only the
+available variable elements will be present. If length is given and is
+negative then the sequence will stop that many elements from the end of the
+variable. If it is omitted, then the sequence will have everything from offset
+up until the end of the variable.
+
+.. note::
+
+    It also works with objects implementing the `Traversable`_ interface.
+
+Arguments
+---------
+
+ * ``start``:         The start of the slice
+ * ``length``:        The size of the slice
+ * ``preserve_keys``: Whether to preserve key or not (when the input is an array)
+
+.. _`Traversable`: http://php.net/manual/en/class.traversable.php
+.. _`array_slice`: http://php.net/array_slice
+.. _`substr`:      http://php.net/substr
diff --git a/vendor/twig/twig/doc/filters/sort.rst b/vendor/twig/twig/doc/filters/sort.rst
new file mode 100644
index 00000000..33311528
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/sort.rst
@@ -0,0 +1,17 @@
+``sort``
+========
+
+The ``sort`` filter sorts an array:
+
+.. code-block:: jinja
+
+    {% for user in users|sort %}
+        ...
+    {% endfor %}
+
+.. note::
+
+    Internally, Twig uses the PHP `asort`_ function to maintain index
+    association.
+
+.. _`asort`: http://php.net/asort
diff --git a/vendor/twig/twig/doc/filters/split.rst b/vendor/twig/twig/doc/filters/split.rst
new file mode 100644
index 00000000..7cd2ca5b
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/split.rst
@@ -0,0 +1,53 @@
+``split``
+=========
+
+.. versionadded:: 1.10.3
+    The split filter was added in Twig 1.10.3.
+
+The ``split`` filter splits a string by the given delimiter and returns a list
+of strings:
+
+.. code-block:: jinja
+
+    {{ "one,two,three"|split(',') }}
+    {# returns ['one', 'two', 'three'] #}
+
+You can also pass a ``limit`` argument:
+
+ * If ``limit`` is positive, the returned array will contain a maximum of
+   limit elements with the last element containing the rest of string;
+
+ * If ``limit`` is negative, all components except the last -limit are
+   returned;
+
+ * If ``limit`` is zero, then this is treated as 1.
+
+.. code-block:: jinja
+
+    {{ "one,two,three,four,five"|split(',', 3) }}
+    {# returns ['one', 'two', 'three,four,five'] #}
+
+If the ``delimiter`` is an empty string, then value will be split by equal
+chunks. Length is set by the ``limit`` argument (one character by default).
+
+.. code-block:: jinja
+
+    {{ "123"|split('') }}
+    {# returns ['1', '2', '3'] #}
+
+    {{ "aabbcc"|split('', 2) }}
+    {# returns ['aa', 'bb', 'cc'] #}
+
+.. note::
+
+    Internally, Twig uses the PHP `explode`_ or `str_split`_ (if delimiter is
+    empty) functions for string splitting.
+
+Arguments
+---------
+
+ * ``delimiter``: The delimiter
+ * ``limit``:     The limit argument
+
+.. _`explode`:   http://php.net/explode
+.. _`str_split`: http://php.net/str_split
diff --git a/vendor/twig/twig/doc/filters/striptags.rst b/vendor/twig/twig/doc/filters/striptags.rst
new file mode 100644
index 00000000..72c6f252
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/striptags.rst
@@ -0,0 +1,15 @@
+``striptags``
+=============
+
+The ``striptags`` filter strips SGML/XML tags and replace adjacent whitespace
+by one space:
+
+.. code-block:: jinja
+
+    {{ some_html|striptags }}
+
+.. note::
+
+    Internally, Twig uses the PHP `strip_tags`_ function.
+
+.. _`strip_tags`: http://php.net/strip_tags
diff --git a/vendor/twig/twig/doc/filters/title.rst b/vendor/twig/twig/doc/filters/title.rst
new file mode 100644
index 00000000..c5a318e8
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/title.rst
@@ -0,0 +1,11 @@
+``title``
+=========
+
+The ``title`` filter returns a titlecased version of the value. Words will
+start with uppercase letters, all remaining characters are lowercase:
+
+.. code-block:: jinja
+
+    {{ 'my first car'|title }}
+
+    {# outputs 'My First Car' #}
diff --git a/vendor/twig/twig/doc/filters/trim.rst b/vendor/twig/twig/doc/filters/trim.rst
new file mode 100644
index 00000000..f38afd55
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/trim.rst
@@ -0,0 +1,29 @@
+``trim``
+========
+
+.. versionadded:: 1.6.2
+    The trim filter was added in Twig 1.6.2.
+
+The ``trim`` filter strips whitespace (or other characters) from the beginning
+and end of a string:
+
+.. code-block:: jinja
+
+    {{ '  I like Twig.  '|trim }}
+
+    {# outputs 'I like Twig.' #}
+
+    {{ '  I like Twig.'|trim('.') }}
+
+    {# outputs '  I like Twig' #}
+
+.. note::
+
+    Internally, Twig uses the PHP `trim`_ function.
+
+Arguments
+---------
+
+ * ``character_mask``: The characters to strip
+
+.. _`trim`: http://php.net/trim
diff --git a/vendor/twig/twig/doc/filters/upper.rst b/vendor/twig/twig/doc/filters/upper.rst
new file mode 100644
index 00000000..561cebe3
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/upper.rst
@@ -0,0 +1,10 @@
+``upper``
+=========
+
+The ``upper`` filter converts a value to uppercase:
+
+.. code-block:: jinja
+
+    {{ 'welcome'|upper }}
+
+    {# outputs 'WELCOME' #}
diff --git a/vendor/twig/twig/doc/filters/url_encode.rst b/vendor/twig/twig/doc/filters/url_encode.rst
new file mode 100644
index 00000000..b4f9a6ca
--- /dev/null
+++ b/vendor/twig/twig/doc/filters/url_encode.rst
@@ -0,0 +1,28 @@
+``url_encode``
+==============
+
+.. versionadded:: 1.12.3
+    Support for encoding an array as query string was added in Twig 1.12.3.
+
+The ``url_encode`` filter percent encodes a given string as URL segment
+or an array as query string:
+
+.. code-block:: jinja
+
+    {{ "path-seg*ment"|url_encode }}
+    {# outputs "path-seg%2Ament" #}
+
+    {{ "string with spaces"|url_encode(true) }}
+    {# outputs "string%20with%20spaces" #}
+    
+    {{ {'param': 'value', 'foo': 'bar'}|url_encode }}
+    {# outputs "param=value&foo=bar" #}
+
+.. note::
+
+    Internally, Twig uses the PHP `urlencode`_ (or `rawurlencode`_ if you pass
+    ``true`` as the first parameter) or the `http_build_query`_ function.
+
+.. _`urlencode`:        http://php.net/urlencode
+.. _`rawurlencode`:     http://php.net/rawurlencode
+.. _`http_build_query`: http://php.net/http_build_query
diff --git a/vendor/twig/twig/doc/functions/attribute.rst b/vendor/twig/twig/doc/functions/attribute.rst
new file mode 100644
index 00000000..3051bdaa
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/attribute.rst
@@ -0,0 +1,18 @@
+``attribute``
+=============
+
+.. versionadded:: 1.2
+    The ``attribute`` function was added in Twig 1.2.
+
+``attribute`` can be used to access a "dynamic" attribute of a variable:
+
+.. code-block:: jinja
+
+    {{ attribute(object, method) }}
+    {{ attribute(object, method, arguments) }}
+    {{ attribute(array, item) }}
+
+.. note::
+
+    The resolution algorithm is the same as the one used for the ``.``
+    notation, except that the item can be any valid expression.
diff --git a/vendor/twig/twig/doc/functions/block.rst b/vendor/twig/twig/doc/functions/block.rst
new file mode 100644
index 00000000..fd571efb
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/block.rst
@@ -0,0 +1,15 @@
+``block``
+=========
+
+When a template uses inheritance and if you want to print a block multiple
+times, use the ``block`` function:
+
+.. code-block:: jinja
+
+    <title>{% block title %}{% endblock %}</title>
+
+    <h1>{{ block('title') }}</h1>
+
+    {% block body %}{% endblock %}
+
+.. seealso:: :doc:`extends<../tags/extends>`, :doc:`parent<../functions/parent>`
diff --git a/vendor/twig/twig/doc/functions/constant.rst b/vendor/twig/twig/doc/functions/constant.rst
new file mode 100644
index 00000000..bea0e9fc
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/constant.rst
@@ -0,0 +1,18 @@
+``constant``
+============
+
+.. versionadded: 1.12.1
+    constant now accepts object instances as the second argument.
+
+``constant`` returns the constant value for a given string:
+
+.. code-block:: jinja
+
+    {{ some_date|date(constant('DATE_W3C')) }}
+    {{ constant('Namespace\\Classname::CONSTANT_NAME') }}
+
+As of 1.12.1 you can read constants from object instances as well:
+
+.. code-block:: jinja
+
+    {{ constant('RSS', date) }}
diff --git a/vendor/twig/twig/doc/functions/cycle.rst b/vendor/twig/twig/doc/functions/cycle.rst
new file mode 100644
index 00000000..0015cae1
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/cycle.rst
@@ -0,0 +1,25 @@
+``cycle``
+=========
+
+The ``cycle`` function cycles on an array of values:
+
+.. code-block:: jinja
+
+    {% for i in 0..10 %}
+        {{ cycle(['odd', 'even'], i) }}
+    {% endfor %}
+
+The array can contain any number of values:
+
+.. code-block:: jinja
+
+    {% set fruits = ['apple', 'orange', 'citrus'] %}
+
+    {% for i in 0..10 %}
+        {{ cycle(fruits, i) }}
+    {% endfor %}
+
+Arguments
+---------
+
+ * ``position``: The cycle position
diff --git a/vendor/twig/twig/doc/functions/date.rst b/vendor/twig/twig/doc/functions/date.rst
new file mode 100644
index 00000000..f1c94819
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/date.rst
@@ -0,0 +1,52 @@
+``date``
+========
+
+.. versionadded:: 1.6
+    The date function has been added in Twig 1.6.
+
+.. versionadded:: 1.6.1
+    The default timezone support has been added in Twig 1.6.1.
+
+Converts an argument to a date to allow date comparison:
+
+.. code-block:: jinja
+
+    {% if date(user.created_at) < date('-2days') %}
+        {# do something #}
+    {% endif %}
+
+The argument must be in a format supported by the `date`_ function.
+
+You can pass a timezone as the second argument:
+
+.. code-block:: jinja
+
+    {% if date(user.created_at) < date('-2days', 'Europe/Paris') %}
+        {# do something #}
+    {% endif %}
+
+If no argument is passed, the function returns the current date:
+
+.. code-block:: jinja
+
+    {% if date(user.created_at) < date() %}
+        {# always! #}
+    {% endif %}
+
+.. note::
+
+    You can set the default timezone globally by calling ``setTimezone()`` on
+    the ``core`` extension instance:
+
+    .. code-block:: php
+
+        $twig = new Twig_Environment($loader);
+        $twig->getExtension('core')->setTimezone('Europe/Paris');
+
+Arguments
+---------
+
+ * ``date``:     The date
+ * ``timezone``: The timezone
+
+.. _`date`: http://www.php.net/date
diff --git a/vendor/twig/twig/doc/functions/dump.rst b/vendor/twig/twig/doc/functions/dump.rst
new file mode 100644
index 00000000..1500b0f4
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/dump.rst
@@ -0,0 +1,69 @@
+``dump``
+========
+
+.. versionadded:: 1.5
+    The dump function was added in Twig 1.5.
+
+The ``dump`` function dumps information about a template variable. This is
+mostly useful to debug a template that does not behave as expected by
+introspecting its variables:
+
+.. code-block:: jinja
+
+    {{ dump(user) }}
+
+.. note::
+
+    The ``dump`` function is not available by default. You must add the
+    ``Twig_Extension_Debug`` extension explicitly when creating your Twig
+    environment::
+
+        $twig = new Twig_Environment($loader, array(
+            'debug' => true,
+            // ...
+        ));
+        $twig->addExtension(new Twig_Extension_Debug());
+
+    Even when enabled, the ``dump`` function won't display anything if the
+    ``debug`` option on the environment is not enabled (to avoid leaking debug
+    information on a production server).
+
+In an HTML context, wrap the output with a ``pre`` tag to make it easier to
+read:
+
+.. code-block:: jinja
+
+    <pre>
+        {{ dump(user) }}
+    </pre>
+
+.. tip::
+
+    Using a ``pre`` tag is not needed when `XDebug`_ is enabled and
+    ``html_errors`` is ``on``; as a bonus, the output is also nicer with
+    XDebug enabled.
+
+You can debug several variables by passing them as additional arguments:
+
+.. code-block:: jinja
+
+    {{ dump(user, categories) }}
+
+If you don't pass any value, all variables from the current context are
+dumped:
+
+.. code-block:: jinja
+
+    {{ dump() }}
+
+.. note::
+
+    Internally, Twig uses the PHP `var_dump`_ function.
+
+Arguments
+---------
+
+ * ``context``: The context to dump
+
+.. _`XDebug`:   http://xdebug.org/docs/display
+.. _`var_dump`: http://php.net/var_dump
diff --git a/vendor/twig/twig/doc/functions/include.rst b/vendor/twig/twig/doc/functions/include.rst
new file mode 100644
index 00000000..eaddfe61
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/include.rst
@@ -0,0 +1,80 @@
+``include``
+===========
+
+.. versionadded:: 1.12
+    The include function was added in Twig 1.12.
+
+The ``include`` function returns the rendered content of a template:
+
+.. code-block:: jinja
+
+    {{ include('template.html') }}
+    {{ include(some_var) }}
+
+Included templates have access to the variables of the active context.
+
+If you are using the filesystem loader, the templates are looked for in the
+paths defined by it.
+
+The context is passed by default to the template but you can also pass
+additional variables:
+
+.. code-block:: jinja
+
+    {# template.html will have access to the variables from the current context and the additional ones provided #}
+    {{ include('template.html', {foo: 'bar'}) }}
+
+You can disable access to the context by setting ``with_context`` to
+``false``:
+
+.. code-block:: jinja
+
+    {# only the foo variable will be accessible #}
+    {{ include('template.html', {foo: 'bar'}, with_context = false) }}
+
+.. code-block:: jinja
+
+    {# no variables will be accessible #}
+    {{ include('template.html', with_context = false) }}
+
+And if the expression evaluates to a ``Twig_Template`` object, Twig will use it
+directly::
+
+    // {{ include(template) }}
+
+    $template = $twig->loadTemplate('some_template.twig');
+
+    $twig->loadTemplate('template.twig')->display(array('template' => $template));
+
+When you set the ``ignore_missing`` flag, Twig will return an empty string if
+the template does not exist:
+
+.. code-block:: jinja
+
+    {{ include('sidebar.html', ignore_missing = true) }}
+
+You can also provide a list of templates that are checked for existence before
+inclusion. The first template that exists will be rendered:
+
+.. code-block:: jinja
+
+    {{ include(['page_detailed.html', 'page.html']) }}
+
+If ``ignore_missing`` is set, it will fall back to rendering nothing if none
+of the templates exist, otherwise it will throw an exception.
+
+When including a template created by an end user, you should consider
+sandboxing it:
+
+.. code-block:: jinja
+
+    {{ include('page.html', sandboxed = true) }}
+
+Arguments
+---------
+
+ * ``template``:       The template to render
+ * ``variables``:      The variables to pass to the template
+ * ``with_context``:   Whether to pass the current context variables or not
+ * ``ignore_missing``: Whether to ignore missing templates or not
+ * ``sandboxed``:      Whether to sandbox the template or not
diff --git a/vendor/twig/twig/doc/functions/index.rst b/vendor/twig/twig/doc/functions/index.rst
new file mode 100644
index 00000000..8650cbdb
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/index.rst
@@ -0,0 +1,17 @@
+Functions
+=========
+
+.. toctree::
+    :maxdepth: 1
+
+    attribute
+    block
+    constant
+    cycle
+    date
+    dump
+    include
+    parent
+    random
+    range
+    template_from_string
diff --git a/vendor/twig/twig/doc/functions/parent.rst b/vendor/twig/twig/doc/functions/parent.rst
new file mode 100644
index 00000000..f5bd2001
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/parent.rst
@@ -0,0 +1,20 @@
+``parent``
+==========
+
+When a template uses inheritance, it's possible to render the contents of the
+parent block when overriding a block by using the ``parent`` function:
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% block sidebar %}
+        <h3>Table Of Contents</h3>
+        ...
+        {{ parent() }}
+    {% endblock %}
+
+The ``parent()`` call will return the content of the ``sidebar`` block as
+defined in the ``base.html`` template.
+
+.. seealso:: :doc:`extends<../tags/extends>`, :doc:`block<../functions/block>`, :doc:`block<../tags/block>`
diff --git a/vendor/twig/twig/doc/functions/random.rst b/vendor/twig/twig/doc/functions/random.rst
new file mode 100644
index 00000000..a5a916bb
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/random.rst
@@ -0,0 +1,29 @@
+``random``
+==========
+
+.. versionadded:: 1.5
+    The random function was added in Twig 1.5.
+
+.. versionadded:: 1.6
+    String and integer handling was added in Twig 1.6.
+
+The ``random`` function returns a random value depending on the supplied
+parameter type:
+
+* a random item from a sequence;
+* a random character from a string;
+* a random integer between 0 and the integer parameter (inclusive).
+
+.. code-block:: jinja
+
+    {{ random(['apple', 'orange', 'citrus']) }} {# example output: orange #}
+    {{ random('ABC') }}                         {# example output: C #}
+    {{ random() }}                              {# example output: 15386094 (works as native PHP `mt_rand`_ function) #}
+    {{ random(5) }}                             {# example output: 3 #}
+
+Arguments
+---------
+
+ * ``values``: The values
+
+.. _`mt_rand`: http://php.net/mt_rand
diff --git a/vendor/twig/twig/doc/functions/range.rst b/vendor/twig/twig/doc/functions/range.rst
new file mode 100644
index 00000000..b1fa5471
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/range.rst
@@ -0,0 +1,45 @@
+``range``
+=========
+
+Returns a list containing an arithmetic progression of integers:
+
+.. code-block:: jinja
+
+    {% for i in range(0, 3) %}
+        {{ i }},
+    {% endfor %}
+
+    {# returns 0, 1, 2, 3 #}
+
+When step is given (as the third parameter), it specifies the increment (or
+decrement):
+
+.. code-block:: jinja
+
+    {% for i in range(0, 6, 2) %}
+        {{ i }},
+    {% endfor %}
+
+    {# returns 0, 2, 4, 6 #}
+
+The Twig built-in ``..`` operator is just syntactic sugar for the ``range``
+function (with a step of 1):
+
+.. code-block:: jinja
+
+    {% for i in 0..3 %}
+        {{ i }},
+    {% endfor %}
+
+.. tip::
+
+    The ``range`` function works as the native PHP `range`_ function.
+
+Arguments
+---------
+
+ * ``low``:  The first value of the sequence.
+ * ``high``: The highest possible value of the sequence.
+ * ``step``: The increment between elements of the sequence.
+
+.. _`range`: http://php.net/range
diff --git a/vendor/twig/twig/doc/functions/template_from_string.rst b/vendor/twig/twig/doc/functions/template_from_string.rst
new file mode 100644
index 00000000..bbb06d86
--- /dev/null
+++ b/vendor/twig/twig/doc/functions/template_from_string.rst
@@ -0,0 +1,32 @@
+``template_from_string``
+========================
+
+.. versionadded:: 1.11
+    The template_from_string function was added in Twig 1.11.
+
+The ``template_from_string`` function loads a template from a string:
+
+.. code-block:: jinja
+
+    {{ include(template_from_string("Hello {{ name }}") }}
+    {{ include(template_from_string(page.template)) }}
+
+.. note::
+
+    The ``template_from_string`` function is not available by default. You
+    must add the ``Twig_Extension_StringLoader`` extension explicitly when
+    creating your Twig environment::
+
+        $twig = new Twig_Environment(...);
+        $twig->addExtension(new Twig_Extension_StringLoader());
+
+.. note::
+
+    Even if you will probably always use the ``template_from_string`` function
+    with the ``include`` function, you can use it with any tag or function that
+    takes a template as an argument (like the ``embed`` or ``extends`` tags).
+
+Arguments
+---------
+
+ * ``template``: The template
diff --git a/vendor/twig/twig/doc/index.rst b/vendor/twig/twig/doc/index.rst
new file mode 100644
index 00000000..3e5166c6
--- /dev/null
+++ b/vendor/twig/twig/doc/index.rst
@@ -0,0 +1,18 @@
+Twig
+====
+
+.. toctree::
+    :maxdepth: 2
+
+    intro
+    templates
+    api
+    advanced
+    internals
+    recipes
+    coding_standards
+    tags/index
+    filters/index
+    functions/index
+    tests/index
+    deprecated
diff --git a/vendor/twig/twig/doc/internals.rst b/vendor/twig/twig/doc/internals.rst
new file mode 100644
index 00000000..79a3c8d5
--- /dev/null
+++ b/vendor/twig/twig/doc/internals.rst
@@ -0,0 +1,140 @@
+Twig Internals
+==============
+
+Twig is very extensible and you can easily hack it. Keep in mind that you
+should probably try to create an extension before hacking the core, as most
+features and enhancements can be done with extensions. This chapter is also
+useful for people who want to understand how Twig works under the hood.
+
+How Twig works?
+---------------
+
+The rendering of a Twig template can be summarized into four key steps:
+
+* **Load** the template: If the template is already compiled, load it and go
+  to the *evaluation* step, otherwise:
+
+  * First, the **lexer** tokenizes the template source code into small pieces
+    for easier processing;
+  * Then, the **parser** converts the token stream into a meaningful tree
+    of nodes (the Abstract Syntax Tree);
+  * Eventually, the *compiler* transforms the AST into PHP code;
+
+* **Evaluate** the template: It basically means calling the ``display()``
+  method of the compiled template and passing it the context.
+
+The Lexer
+---------
+
+The lexer tokenizes a template source code into a token stream (each token is
+an instance of ``Twig_Token``, and the stream is an instance of
+``Twig_TokenStream``). The default lexer recognizes 13 different token types:
+
+* ``Twig_Token::BLOCK_START_TYPE``, ``Twig_Token::BLOCK_END_TYPE``: Delimiters for blocks (``{% %}``)
+* ``Twig_Token::VAR_START_TYPE``, ``Twig_Token::VAR_END_TYPE``: Delimiters for variables (``{{ }}``)
+* ``Twig_Token::TEXT_TYPE``: A text outside an expression;
+* ``Twig_Token::NAME_TYPE``: A name in an expression;
+* ``Twig_Token::NUMBER_TYPE``: A number in an expression;
+* ``Twig_Token::STRING_TYPE``: A string in an expression;
+* ``Twig_Token::OPERATOR_TYPE``: An operator;
+* ``Twig_Token::PUNCTUATION_TYPE``: A punctuation sign;
+* ``Twig_Token::INTERPOLATION_START_TYPE``, ``Twig_Token::INTERPOLATION_END_TYPE`` (as of Twig 1.5): Delimiters for string interpolation;
+* ``Twig_Token::EOF_TYPE``: Ends of template.
+
+You can manually convert a source code into a token stream by calling the
+``tokenize()`` of an environment::
+
+    $stream = $twig->tokenize($source, $identifier);
+
+As the stream has a ``__toString()`` method, you can have a textual
+representation of it by echoing the object::
+
+    echo $stream."\n";
+
+Here is the output for the ``Hello {{ name }}`` template:
+
+.. code-block:: text
+
+    TEXT_TYPE(Hello )
+    VAR_START_TYPE()
+    NAME_TYPE(name)
+    VAR_END_TYPE()
+    EOF_TYPE()
+
+.. note::
+
+    You can change the default lexer use by Twig (``Twig_Lexer``) by calling
+    the ``setLexer()`` method::
+
+        $twig->setLexer($lexer);
+
+The Parser
+----------
+
+The parser converts the token stream into an AST (Abstract Syntax Tree), or a
+node tree (an instance of ``Twig_Node_Module``). The core extension defines
+the basic nodes like: ``for``, ``if``, ... and the expression nodes.
+
+You can manually convert a token stream into a node tree by calling the
+``parse()`` method of an environment::
+
+    $nodes = $twig->parse($stream);
+
+Echoing the node object gives you a nice representation of the tree::
+
+    echo $nodes."\n";
+
+Here is the output for the ``Hello {{ name }}`` template:
+
+.. code-block:: text
+
+    Twig_Node_Module(
+      Twig_Node_Text(Hello )
+      Twig_Node_Print(
+        Twig_Node_Expression_Name(name)
+      )
+    )
+
+.. note::
+
+    The default parser (``Twig_TokenParser``) can be also changed by calling the
+    ``setParser()`` method::
+
+        $twig->setParser($parser);
+
+The Compiler
+------------
+
+The last step is done by the compiler. It takes a node tree as an input and
+generates PHP code usable for runtime execution of the template.
+
+You can call the compiler by hand with the ``compile()`` method of an
+environment::
+
+    $php = $twig->compile($nodes);
+
+The ``compile()`` method returns the PHP source code representing the node.
+
+The generated template for a ``Hello {{ name }}`` template reads as follows
+(the actual output can differ depending on the version of Twig you are
+using)::
+
+    /* Hello {{ name }} */
+    class __TwigTemplate_1121b6f109fe93ebe8c6e22e3712bceb extends Twig_Template
+    {
+        protected function doDisplay(array $context, array $blocks = array())
+        {
+            // line 1
+            echo "Hello ";
+            echo twig_escape_filter($this->env, $this->getContext($context, "name"), "ndex", null, true);
+        }
+
+        // some more code
+    }
+
+.. note::
+
+    As for the lexer and the parser, the default compiler (``Twig_Compiler``) can
+    be changed by calling the ``setCompiler()`` method::
+
+        $twig->setCompiler($compiler);
diff --git a/vendor/twig/twig/doc/intro.rst b/vendor/twig/twig/doc/intro.rst
new file mode 100644
index 00000000..bdcdb8a0
--- /dev/null
+++ b/vendor/twig/twig/doc/intro.rst
@@ -0,0 +1,164 @@
+Introduction
+============
+
+This is the documentation for Twig, the flexible, fast, and secure template
+engine for PHP.
+
+If you have any exposure to other text-based template languages, such as
+Smarty, Django, or Jinja, you should feel right at home with Twig. It's both
+designer and developer friendly by sticking to PHP's principles and adding
+functionality useful for templating environments.
+
+The key-features are...
+
+* *Fast*: Twig compiles templates down to plain optimized PHP code. The
+  overhead compared to regular PHP code was reduced to the very minimum.
+
+* *Secure*: Twig has a sandbox mode to evaluate untrusted template code. This
+  allows Twig to be used as a template language for applications where users
+  may modify the template design.
+
+* *Flexible*: Twig is powered by a flexible lexer and parser. This allows the
+  developer to define its own custom tags and filters, and create its own DSL.
+
+Prerequisites
+-------------
+
+Twig needs at least **PHP 5.2.4** to run.
+
+Installation
+------------
+
+You have multiple ways to install Twig.
+
+Installing via Composer (recommended)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+1. Install composer in your project:
+
+.. code-block:: bash
+
+    curl -s http://getcomposer.org/installer | php
+
+2. Create a ``composer.json`` file in your project root:
+
+.. code-block:: javascript
+
+    {
+        "require": {
+            "twig/twig": "1.*"
+        }
+    }
+
+3. Install via composer
+
+.. code-block:: bash
+
+    php composer.phar install
+
+.. note::
+    If you want to learn more about Composer, the ``composer.json`` file syntax
+    and its usage, you can read the `online documentation`_.
+
+Installing from the tarball release
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+1. Download the most recent tarball from the `download page`_
+2. Unpack the tarball
+3. Move the files somewhere in your project
+
+Installing the development version
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+1. Install Git
+2. ``git clone git://github.com/fabpot/Twig.git``
+
+Installing the PEAR package
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+1. Install PEAR
+2. ``pear channel-discover pear.twig-project.org``
+3. ``pear install twig/Twig`` (or ``pear install twig/Twig-beta``)
+
+
+Installing the C extension
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. versionadded:: 1.4
+    The C extension was added in Twig 1.4.
+
+Twig comes with a C extension that enhances the performance of the Twig
+runtime engine. You can install it like any other PHP extension:
+
+.. code-block:: bash
+
+    $ cd ext/twig
+    $ phpize
+    $ ./configure
+    $ make
+    $ make install
+
+Finally, enable the extension in your ``php.ini`` configuration file:
+
+.. code-block:: ini
+
+    extension=twig.so
+
+And from now on, Twig will automatically compile your templates to take
+advantage of the C extension. Note that this extension does not replace the
+PHP code but only provides an optimized version of the
+``Twig_Template::getAttribute()`` method.
+
+.. tip::
+
+    On Windows, you can also simply download and install a `pre-built DLL`_.
+
+Basic API Usage
+---------------
+
+This section gives you a brief introduction to the PHP API for Twig.
+
+The first step to use Twig is to register its autoloader::
+
+    require_once '/path/to/lib/Twig/Autoloader.php';
+    Twig_Autoloader::register();
+
+Replace the ``/path/to/lib/`` path with the path you used for Twig
+installation.
+
+If you have installed Twig via Composer you can take advantage of Composer's
+autoload mechanism by replacing the previous snippet for::
+
+    require_once '/path/to/vendor/autoload.php';
+
+.. note::
+
+    Twig follows the PEAR convention names for its classes, which means you
+    can easily integrate Twig classes loading in your own autoloader.
+
+.. code-block:: php
+
+    $loader = new Twig_Loader_String();
+    $twig = new Twig_Environment($loader);
+
+    echo $twig->render('Hello {{ name }}!', array('name' => 'Fabien'));
+
+Twig uses a loader (``Twig_Loader_String``) to locate templates, and an
+environment (``Twig_Environment``) to store the configuration.
+
+The ``render()`` method loads the template passed as a first argument and
+renders it with the variables passed as a second argument.
+
+As templates are generally stored on the filesystem, Twig also comes with a
+filesystem loader::
+
+    $loader = new Twig_Loader_Filesystem('/path/to/templates');
+    $twig = new Twig_Environment($loader, array(
+        'cache' => '/path/to/compilation_cache',
+    ));
+
+    echo $twig->render('index.html', array('name' => 'Fabien'));
+
+.. _`download page`: https://github.com/fabpot/Twig/tags
+.. _`online documentation`: http://getcomposer.org/doc
+.. _`pre-built DLL`: https://github.com/stealth35/stealth35.github.com/downloads
diff --git a/vendor/twig/twig/doc/recipes.rst b/vendor/twig/twig/doc/recipes.rst
new file mode 100644
index 00000000..dfcc9205
--- /dev/null
+++ b/vendor/twig/twig/doc/recipes.rst
@@ -0,0 +1,475 @@
+Recipes
+=======
+
+Making a Layout conditional
+---------------------------
+
+Working with Ajax means that the same content is sometimes displayed as is,
+and sometimes decorated with a layout. As Twig layout template names can be
+any valid expression, you can pass a variable that evaluates to ``true`` when
+the request is made via Ajax and choose the layout accordingly:
+
+.. code-block:: jinja
+
+    {% extends request.ajax ? "base_ajax.html" : "base.html" %}
+
+    {% block content %}
+        This is the content to be displayed.
+    {% endblock %}
+
+Making an Include dynamic
+-------------------------
+
+When including a template, its name does not need to be a string. For
+instance, the name can depend on the value of a variable:
+
+.. code-block:: jinja
+
+    {% include var ~ '_foo.html' %}
+
+If ``var`` evaluates to ``index``, the ``index_foo.html`` template will be
+rendered.
+
+As a matter of fact, the template name can be any valid expression, such as
+the following:
+
+.. code-block:: jinja
+
+    {% include var|default('index') ~ '_foo.html' %}
+
+Overriding a Template that also extends itself
+----------------------------------------------
+
+A template can be customized in two different ways:
+
+* *Inheritance*: A template *extends* a parent template and overrides some
+  blocks;
+
+* *Replacement*: If you use the filesystem loader, Twig loads the first
+  template it finds in a list of configured directories; a template found in a
+  directory *replaces* another one from a directory further in the list.
+
+But how do you combine both: *replace* a template that also extends itself
+(aka a template in a directory further in the list)?
+
+Let's say that your templates are loaded from both ``.../templates/mysite``
+and ``.../templates/default`` in this order. The ``page.twig`` template,
+stored in ``.../templates/default`` reads as follows:
+
+.. code-block:: jinja
+
+    {# page.twig #}
+    {% extends "layout.twig" %}
+
+    {% block content %}
+    {% endblock %}
+
+You can replace this template by putting a file with the same name in
+``.../templates/mysite``. And if you want to extend the original template, you
+might be tempted to write the following:
+
+.. code-block:: jinja
+
+    {# page.twig in .../templates/mysite #}
+    {% extends "page.twig" %} {# from .../templates/default #}
+
+Of course, this will not work as Twig will always load the template from
+``.../templates/mysite``.
+
+It turns out it is possible to get this to work, by adding a directory right
+at the end of your template directories, which is the parent of all of the
+other directories: ``.../templates`` in our case. This has the effect of
+making every template file within our system uniquely addressable. Most of the
+time you will use the "normal" paths, but in the special case of wanting to
+extend a template with an overriding version of itself we can reference its
+parent's full, unambiguous template path in the extends tag:
+
+.. code-block:: jinja
+
+    {# page.twig in .../templates/mysite #}
+    {% extends "default/page.twig" %} {# from .../templates #}
+
+.. note::
+
+    This recipe was inspired by the following Django wiki page:
+    http://code.djangoproject.com/wiki/ExtendingTemplates
+
+Customizing the Syntax
+----------------------
+
+Twig allows some syntax customization for the block delimiters. It's not
+recommended to use this feature as templates will be tied with your custom
+syntax. But for specific projects, it can make sense to change the defaults.
+
+To change the block delimiters, you need to create your own lexer object::
+
+    $twig = new Twig_Environment();
+
+    $lexer = new Twig_Lexer($twig, array(
+        'tag_comment'   => array('{#', '#}'),
+        'tag_block'     => array('{%', '%}'),
+        'tag_variable'  => array('{{', '}}'),
+        'interpolation' => array('#{', '}'),
+    ));
+    $twig->setLexer($lexer);
+
+Here are some configuration example that simulates some other template engines
+syntax::
+
+    // Ruby erb syntax
+    $lexer = new Twig_Lexer($twig, array(
+        'tag_comment'  => array('<%#', '%>'),
+        'tag_block'    => array('<%', '%>'),
+        'tag_variable' => array('<%=', '%>'),
+    ));
+
+    // SGML Comment Syntax
+    $lexer = new Twig_Lexer($twig, array(
+        'tag_comment'  => array('<!--#', '-->'),
+        'tag_block'    => array('<!--', '-->'),
+        'tag_variable' => array('${', '}'),
+    ));
+
+    // Smarty like
+    $lexer = new Twig_Lexer($twig, array(
+        'tag_comment'  => array('{*', '*}'),
+        'tag_block'    => array('{', '}'),
+        'tag_variable' => array('{$', '}'),
+    ));
+
+Using dynamic Object Properties
+-------------------------------
+
+When Twig encounters a variable like ``article.title``, it tries to find a
+``title`` public property in the ``article`` object.
+
+It also works if the property does not exist but is rather defined dynamically
+thanks to the magic ``__get()`` method; you just need to also implement the
+``__isset()`` magic method like shown in the following snippet of code::
+
+    class Article
+    {
+        public function __get($name)
+        {
+            if ('title' == $name) {
+                return 'The title';
+            }
+
+            // throw some kind of error
+        }
+
+        public function __isset($name)
+        {
+            if ('title' == $name) {
+                return true;
+            }
+
+            return false;
+        }
+    }
+
+Accessing the parent Context in Nested Loops
+--------------------------------------------
+
+Sometimes, when using nested loops, you need to access the parent context. The
+parent context is always accessible via the ``loop.parent`` variable. For
+instance, if you have the following template data::
+
+    $data = array(
+        'topics' => array(
+            'topic1' => array('Message 1 of topic 1', 'Message 2 of topic 1'),
+            'topic2' => array('Message 1 of topic 2', 'Message 2 of topic 2'),
+        ),
+    );
+
+And the following template to display all messages in all topics:
+
+.. code-block:: jinja
+
+    {% for topic, messages in topics %}
+        * {{ loop.index }}: {{ topic }}
+      {% for message in messages %}
+          - {{ loop.parent.loop.index }}.{{ loop.index }}: {{ message }}
+      {% endfor %}
+    {% endfor %}
+
+The output will be similar to:
+
+.. code-block:: text
+
+    * 1: topic1
+      - 1.1: The message 1 of topic 1
+      - 1.2: The message 2 of topic 1
+    * 2: topic2
+      - 2.1: The message 1 of topic 2
+      - 2.2: The message 2 of topic 2
+
+In the inner loop, the ``loop.parent`` variable is used to access the outer
+context. So, the index of the current ``topic`` defined in the outer for loop
+is accessible via the ``loop.parent.loop.index`` variable.
+
+Defining undefined Functions and Filters on the Fly
+---------------------------------------------------
+
+When a function (or a filter) is not defined, Twig defaults to throw a
+``Twig_Error_Syntax`` exception. However, it can also call a `callback`_ (any
+valid PHP callable) which should return a function (or a filter).
+
+For filters, register callbacks with ``registerUndefinedFilterCallback()``.
+For functions, use ``registerUndefinedFunctionCallback()``::
+
+    // auto-register all native PHP functions as Twig functions
+    // don't try this at home as it's not secure at all!
+    $twig->registerUndefinedFunctionCallback(function ($name) {
+        if (function_exists($name)) {
+            return new Twig_Function_Function($name);
+        }
+
+        return false;
+    });
+
+If the callable is not able to return a valid function (or filter), it must
+return ``false``.
+
+If you register more than one callback, Twig will call them in turn until one
+does not return ``false``.
+
+.. tip::
+
+    As the resolution of functions and filters is done during compilation,
+    there is no overhead when registering these callbacks.
+
+Validating the Template Syntax
+------------------------------
+
+When template code is providing by a third-party (through a web interface for
+instance), it might be interesting to validate the template syntax before
+saving it. If the template code is stored in a `$template` variable, here is
+how you can do it::
+
+    try {
+        $twig->parse($twig->tokenize($template));
+
+        // the $template is valid
+    } catch (Twig_Error_Syntax $e) {
+        // $template contains one or more syntax errors
+    }
+
+If you iterate over a set of files, you can pass the filename to the
+``tokenize()`` method to get the filename in the exception message::
+
+    foreach ($files as $file) {
+        try {
+            $twig->parse($twig->tokenize($template, $file));
+
+            // the $template is valid
+        } catch (Twig_Error_Syntax $e) {
+            // $template contains one or more syntax errors
+        }
+    }
+
+.. note::
+
+    This method won't catch any sandbox policy violations because the policy
+    is enforced during template rendering (as Twig needs the context for some
+    checks like allowed methods on objects).
+
+Refreshing modified Templates when APC is enabled and apc.stat = 0
+------------------------------------------------------------------
+
+When using APC with ``apc.stat`` set to ``0`` and Twig cache enabled, clearing
+the template cache won't update the APC cache. To get around this, one can
+extend ``Twig_Environment`` and force the update of the APC cache when Twig
+rewrites the cache::
+
+    class Twig_Environment_APC extends Twig_Environment
+    {
+        protected function writeCacheFile($file, $content)
+        {
+            parent::writeCacheFile($file, $content);
+
+            // Compile cached file into bytecode cache
+            apc_compile_file($file);
+        }
+    }
+
+Reusing a stateful Node Visitor
+-------------------------------
+
+When attaching a visitor to a ``Twig_Environment`` instance, Twig uses it to
+visit *all* templates it compiles. If you need to keep some state information
+around, you probably want to reset it when visiting a new template.
+
+This can be easily achieved with the following code::
+
+    protected $someTemplateState = array();
+
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            // reset the state as we are entering a new template
+            $this->someTemplateState = array();
+        }
+
+        // ...
+
+        return $node;
+    }
+
+Using the Template name to set the default Escaping Strategy
+------------------------------------------------------------
+
+.. versionadded:: 1.8
+    This recipe requires Twig 1.8 or later.
+
+The ``autoescape`` option determines the default escaping strategy to use when
+no escaping is applied on a variable. When Twig is used to mostly generate
+HTML files, you can set it to ``html`` and explicitly change it to ``js`` when
+you have some dynamic JavaScript files thanks to the ``autoescape`` tag:
+
+.. code-block:: jinja
+
+    {% autoescape 'js' %}
+        ... some JS ...
+    {% endautoescape %}
+
+But if you have many HTML and JS files, and if your template names follow some
+conventions, you can instead determine the default escaping strategy to use
+based on the template name. Let's say that your template names always ends
+with ``.html`` for HTML files, ``.js`` for JavaScript ones, and ``.css`` for
+stylesheets, here is how you can configure Twig::
+
+    class TwigEscapingGuesser
+    {
+        function guess($filename)
+        {
+            // get the format
+            $format = substr($filename, strrpos($filename, '.') + 1);
+
+            switch ($format) {
+                case 'js':
+                    return 'js';
+                case 'css':
+                    return 'css';
+                case 'html':
+                default:
+                    return 'html';
+            }
+        }
+    }
+
+    $loader = new Twig_Loader_Filesystem('/path/to/templates');
+    $twig = new Twig_Environment($loader, array(
+        'autoescape' => array(new TwigEscapingGuesser(), 'guess'),
+    ));
+
+This dynamic strategy does not incur any overhead at runtime as auto-escaping
+is done at compilation time.
+
+Using a Database to store Templates
+-----------------------------------
+
+If you are developing a CMS, templates are usually stored in a database. This
+recipe gives you a simple PDO template loader you can use as a starting point
+for your own.
+
+First, let's create a temporary in-memory SQLite3 database to work with::
+
+    $dbh = new PDO('sqlite::memory:');
+    $dbh->exec('CREATE TABLE templates (name STRING, source STRING, last_modified INTEGER)');
+    $base = '{% block content %}{% endblock %}';
+    $index = '
+    {% extends "base.twig" %}
+    {% block content %}Hello {{ name }}{% endblock %}
+    ';
+    $now = time();
+    $dbh->exec("INSERT INTO templates (name, source, last_modified) VALUES ('base.twig', '$base', $now)");
+    $dbh->exec("INSERT INTO templates (name, source, last_modified) VALUES ('index.twig', '$index', $now)");
+
+We have created a simple ``templates`` table that hosts two templates:
+``base.twig`` and ``index.twig``.
+
+Now, let's define a loader able to use this database::
+
+    class DatabaseTwigLoader implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+    {
+        protected $dbh;
+
+        public function __construct(PDO $dbh)
+        {
+            $this->dbh = $dbh;
+        }
+
+        public function getSource($name)
+        {
+            if (false === $source = $this->getValue('source', $name)) {
+                throw new Twig_Error_Loader(sprintf('Template "%s" does not exist.', $name));
+            }
+
+            return $source;
+        }
+
+        // Twig_ExistsLoaderInterface as of Twig 1.11
+        public function exists($name)
+        {
+            return $name === $this->getValue('name', $name);
+        }
+
+        public function getCacheKey($name)
+        {
+            return $name;
+        }
+
+        public function isFresh($name, $time)
+        {
+            if (false === $lastModified = $this->getValue('last_modified', $name)) {
+                return false;
+            }
+
+            return $lastModified <= $time;
+        }
+
+        protected function getValue($column, $name)
+        {
+            $sth = $this->dbh->prepare('SELECT '.$column.' FROM templates WHERE name = :name');
+            $sth->execute(array(':name' => (string) $name));
+
+            return $sth->fetchColumn();
+        }
+    }
+
+Finally, here is an example on how you can use it::
+
+    $loader = new DatabaseTwigLoader($dbh);
+    $twig = new Twig_Environment($loader);
+
+    echo $twig->render('index.twig', array('name' => 'Fabien'));
+
+Using different Template Sources
+--------------------------------
+
+This recipe is the continuation of the previous one. Even if you store the
+contributed templates in a database, you might want to keep the original/base
+templates on the filesystem. When templates can be loaded from different
+sources, you need to use the ``Twig_Loader_Chain`` loader.
+
+As you can see in the previous recipe, we reference the template in the exact
+same way as we would have done it with a regular filesystem loader. This is
+the key to be able to mix and match templates coming from the database, the
+filesystem, or any other loader for that matter: the template name should be a
+logical name, and not the path from the filesystem::
+
+    $loader1 = new DatabaseTwigLoader($dbh);
+    $loader2 = new Twig_Loader_Array(array(
+        'base.twig' => '{% block content %}{% endblock %}',
+    ));
+    $loader = new Twig_Loader_Chain(array($loader1, $loader2));
+
+    $twig = new Twig_Environment($loader);
+
+    echo $twig->render('index.twig', array('name' => 'Fabien'));
+
+Now that the ``base.twig`` templates is defined in an array loader, you can
+remove it from the database, and everything else will still work as before.
+
+.. _callback: http://www.php.net/manual/en/function.is-callable.php
diff --git a/vendor/twig/twig/doc/tags/autoescape.rst b/vendor/twig/twig/doc/tags/autoescape.rst
new file mode 100644
index 00000000..c5ff0c2c
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/autoescape.rst
@@ -0,0 +1,71 @@
+``autoescape``
+==============
+
+Whether automatic escaping is enabled or not, you can mark a section of a
+template to be escaped or not by using the ``autoescape`` tag:
+
+.. code-block:: jinja
+
+    {# The following syntax works as of Twig 1.8 -- see the note below for previous versions #}
+
+    {% autoescape %}
+        Everything will be automatically escaped in this block
+        using the HTML strategy
+    {% endautoescape %}
+
+    {% autoescape 'html' %}
+        Everything will be automatically escaped in this block
+        using the HTML strategy
+    {% endautoescape %}
+
+    {% autoescape 'js' %}
+        Everything will be automatically escaped in this block
+        using the js escaping strategy
+    {% endautoescape %}
+
+    {% autoescape false %}
+        Everything will be outputted as is in this block
+    {% endautoescape %}
+
+.. note::
+
+    Before Twig 1.8, the syntax was different:
+
+    .. code-block:: jinja
+
+        {% autoescape true %}
+            Everything will be automatically escaped in this block
+            using the HTML strategy
+        {% endautoescape %}
+
+        {% autoescape false %}
+            Everything will be outputted as is in this block
+        {% endautoescape %}
+
+        {% autoescape true js %}
+            Everything will be automatically escaped in this block
+            using the js escaping strategy
+        {% endautoescape %}
+
+When automatic escaping is enabled everything is escaped by default except for
+values explicitly marked as safe. Those can be marked in the template by using
+the :doc:`raw<../filters/raw>` filter:
+
+.. code-block:: jinja
+
+    {% autoescape %}
+        {{ safe_value|raw }}
+    {% endautoescape %}
+
+Functions returning template data (like :doc:`macros<macro>` and
+:doc:`parent<../functions/parent>`) always return safe markup.
+
+.. note::
+
+    Twig is smart enough to not escape an already escaped value by the
+    :doc:`escape<../filters/escape>` filter.
+
+.. note::
+
+    The chapter :doc:`Twig for Developers<../api>` gives more information
+    about when and how automatic escaping is applied.
diff --git a/vendor/twig/twig/doc/tags/block.rst b/vendor/twig/twig/doc/tags/block.rst
new file mode 100644
index 00000000..e3804823
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/block.rst
@@ -0,0 +1,11 @@
+``block``
+=========
+
+Blocks are used for inheritance and act as placeholders and replacements at
+the same time. They are documented in detail in the documentation for the
+:doc:`extends<../tags/extends>` tag.
+
+Block names should consist of alphanumeric characters, and underscores. Dashes
+are not permitted.
+
+.. seealso:: :doc:`block<../functions/block>`, :doc:`parent<../functions/parent>`, :doc:`use<../tags/use>`, :doc:`extends<../tags/extends>`
diff --git a/vendor/twig/twig/doc/tags/do.rst b/vendor/twig/twig/doc/tags/do.rst
new file mode 100644
index 00000000..eca63d0a
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/do.rst
@@ -0,0 +1,12 @@
+``do``
+======
+
+.. versionadded:: 1.5
+    The do tag was added in Twig 1.5.
+
+The ``do`` tag works exactly like the regular variable expression (``{{ ...
+}}``) just that it doesn't print anything:
+
+.. code-block:: jinja
+
+    {% do 1 + 2 %}
diff --git a/vendor/twig/twig/doc/tags/embed.rst b/vendor/twig/twig/doc/tags/embed.rst
new file mode 100644
index 00000000..5a6a0299
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/embed.rst
@@ -0,0 +1,178 @@
+``embed``
+=========
+
+.. versionadded:: 1.8
+    The ``embed`` tag was added in Twig 1.8.
+
+The ``embed`` tag combines the behaviour of :doc:`include<include>` and
+:doc:`extends<extends>`.
+It allows you to include another template's contents, just like ``include``
+does. But it also allows you to override any block defined inside the
+included template, like when extending a template.
+
+Think of an embedded template as a "micro layout skeleton".
+
+.. code-block:: jinja
+
+    {% embed "teasers_skeleton.twig" %}
+        {# These blocks are defined in "teasers_skeleton.twig" #}
+        {# and we override them right here:                    #}
+        {% block left_teaser %}
+            Some content for the left teaser box
+        {% endblock %}
+        {% block right_teaser %}
+            Some content for the right teaser box
+        {% endblock %}
+    {% endembed %}
+
+The ``embed`` tag takes the idea of template inheritance to the level of
+content fragments. While template inheritance allows for "document skeletons",
+which are filled with life by child templates, the ``embed`` tag allows you to
+create "skeletons" for smaller units of content and re-use and fill them
+anywhere you like.
+
+Since the use case may not be obvious, let's look at a simplified example.
+Imagine a base template shared by multiple HTML pages, defining a single block
+named "content":
+
+.. code-block:: text
+
+    ┌─── page layout ─────────────────────┐
+    │                                     │
+    │           ┌── block "content" ──┐   │
+    │           │                     │   │
+    │           │                     │   │
+    │           │ (child template to  │   │
+    │           │  put content here)  │   │
+    │           │                     │   │
+    │           │                     │   │
+    │           └─────────────────────┘   │
+    │                                     │
+    └─────────────────────────────────────┘
+
+Some pages ("foo" and "bar") share the same content structure -
+two vertically stacked boxes:
+
+.. code-block:: text
+
+    ┌─── page layout ─────────────────────┐
+    │                                     │
+    │           ┌── block "content" ──┐   │
+    │           │ ┌─ block "top" ───┐ │   │
+    │           │ │                 │ │   │
+    │           │ └─────────────────┘ │   │
+    │           │ ┌─ block "bottom" ┐ │   │
+    │           │ │                 │ │   │
+    │           │ └─────────────────┘ │   │
+    │           └─────────────────────┘   │
+    │                                     │
+    └─────────────────────────────────────┘
+
+While other pages ("boom" and "baz") share a different content structure -
+two boxes side by side:
+
+.. code-block:: text
+
+    ┌─── page layout ─────────────────────┐
+    │                                     │
+    │           ┌── block "content" ──┐   │
+    │           │                     │   │    
+    │           │ ┌ block ┐ ┌ block ┐ │   │
+    │           │ │"left" │ │"right"│ │   │
+    │           │ │       │ │       │ │   │
+    │           │ │       │ │       │ │   │
+    │           │ └───────┘ └───────┘ │   │
+    │           └─────────────────────┘   │
+    │                                     │
+    └─────────────────────────────────────┘
+
+Without the ``embed`` tag, you have two ways to design your templates:
+
+ * Create two "intermediate" base templates that extend the master layout
+   template: one with vertically stacked boxes to be used by the "foo" and
+   "bar" pages and another one with side-by-side boxes for the "boom" and
+   "baz" pages.
+
+ * Embed the markup for the top/bottom and left/right boxes into each page 
+   template directly.
+
+These two solutions do not scale well because they each have a major drawback:
+
+ * The first solution may indeed work for this simplified example. But imagine
+   we add a sidebar, which may again contain different, recurring structures
+   of content. Now we would need to create intermediate base templates for
+   all occurring combinations of content structure and sidebar structure...
+   and so on.
+
+ * The second solution involves duplication of common code with all its negative
+   consequences: any change involves finding and editing all affected copies
+   of the structure, correctness has to be verified for each copy, copies may
+   go out of sync by careless modifications etc.
+
+In such a situation, the ``embed`` tag comes in handy. The common layout
+code can live in a single base template, and the two different content structures,
+let's call them "micro layouts" go into separate templates which are embedded
+as necessary:
+
+Page template ``foo.twig``:
+
+.. code-block:: jinja
+
+    {% extends "layout_skeleton.twig" %}
+
+    {% block content %}
+        {% embed "vertical_boxes_skeleton.twig" %}
+            {% block top %}
+                Some content for the top box
+            {% endblock %}
+
+            {% block bottom %}
+                Some content for the bottom box
+            {% endblock %}
+        {% endembed %}
+    {% endblock %}
+
+And here is the code for ``vertical_boxes_skeleton.twig``:
+
+.. code-block:: html+jinja
+
+    <div class="top_box">
+        {% block top %}
+            Top box default content
+        {% endblock %}
+    </div>
+
+    <div class="bottom_box">
+        {% block bottom %}
+            Bottom box default content
+        {% endblock %}
+    </div>
+
+The goal of the ``vertical_boxes_skeleton.twig`` template being to factor
+out the HTML markup for the boxes.
+
+The ``embed`` tag takes the exact same arguments as the ``include`` tag:
+
+.. code-block:: jinja
+
+    {% embed "base" with {'foo': 'bar'} %}
+        ...
+    {% endembed %}
+
+    {% embed "base" with {'foo': 'bar'} only %}
+        ...
+    {% endembed %}
+
+    {% embed "base" ignore missing %}
+        ...
+    {% endembed %}
+
+.. warning::
+
+    As embedded templates do not have "names", auto-escaping strategies based
+    on the template "filename" won't work as expected if you change the
+    context (for instance, if you embed a CSS/JavaScript template into an HTML
+    one). In that case, explicitly set the default auto-escaping strategy with
+    the ``autoescape`` tag.
+
+.. seealso:: :doc:`include<../tags/include>`
diff --git a/vendor/twig/twig/doc/tags/extends.rst b/vendor/twig/twig/doc/tags/extends.rst
new file mode 100644
index 00000000..f995a5dc
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/extends.rst
@@ -0,0 +1,268 @@
+``extends``
+===========
+
+The ``extends`` tag can be used to extend a template from another one.
+
+.. note::
+
+    Like PHP, Twig does not support multiple inheritance. So you can only have
+    one extends tag called per rendering. However, Twig supports horizontal
+    :doc:`reuse<use>`.
+
+Let's define a base template, ``base.html``, which defines a simple HTML
+skeleton document:
+
+.. code-block:: html+jinja
+
+    <!DOCTYPE html>
+    <html>
+        <head>
+            {% block head %}
+                <link rel="stylesheet" href="style.css" />
+                <title>{% block title %}{% endblock %} - My Webpage</title>
+            {% endblock %}
+        </head>
+        <body>
+            <div id="content">{% block content %}{% endblock %}</div>
+            <div id="footer">
+                {% block footer %}
+                    &copy; Copyright 2011 by <a href="http://domain.invalid/">you</a>.
+                {% endblock %}
+            </div>
+        </body>
+    </html>
+
+In this example, the :doc:`block<block>` tags define four blocks that child
+templates can fill in.
+
+All the ``block`` tag does is to tell the template engine that a child
+template may override those portions of the template.
+
+Child Template
+--------------
+
+A child template might look like this:
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% block title %}Index{% endblock %}
+    {% block head %}
+        {{ parent() }}
+        <style type="text/css">
+            .important { color: #336699; }
+        </style>
+    {% endblock %}
+    {% block content %}
+        <h1>Index</h1>
+        <p class="important">
+            Welcome on my awesome homepage.
+        </p>
+    {% endblock %}
+
+The ``extends`` tag is the key here. It tells the template engine that this
+template "extends" another template. When the template system evaluates this
+template, first it locates the parent. The extends tag should be the first tag
+in the template.
+
+Note that since the child template doesn't define the ``footer`` block, the
+value from the parent template is used instead.
+
+You can't define multiple ``block`` tags with the same name in the same
+template. This limitation exists because a block tag works in "both"
+directions. That is, a block tag doesn't just provide a hole to fill - it also
+defines the content that fills the hole in the *parent*. If there were two
+similarly-named ``block`` tags in a template, that template's parent wouldn't
+know which one of the blocks' content to use.
+
+If you want to print a block multiple times you can however use the
+``block`` function:
+
+.. code-block:: jinja
+
+    <title>{% block title %}{% endblock %}</title>
+    <h1>{{ block('title') }}</h1>
+    {% block body %}{% endblock %}
+
+Parent Blocks
+-------------
+
+It's possible to render the contents of the parent block by using the
+:doc:`parent<../functions/parent>` function. This gives back the results of
+the parent block:
+
+.. code-block:: jinja
+
+    {% block sidebar %}
+        <h3>Table Of Contents</h3>
+        ...
+        {{ parent() }}
+    {% endblock %}
+
+Named Block End-Tags
+--------------------
+
+Twig allows you to put the name of the block after the end tag for better
+readability:
+
+.. code-block:: jinja
+
+    {% block sidebar %}
+        {% block inner_sidebar %}
+            ...
+        {% endblock inner_sidebar %}
+    {% endblock sidebar %}
+
+Of course, the name after the ``endblock`` word must match the block name.
+
+Block Nesting and Scope
+-----------------------
+
+Blocks can be nested for more complex layouts. Per default, blocks have access
+to variables from outer scopes:
+
+.. code-block:: jinja
+
+    {% for item in seq %}
+        <li>{% block loop_item %}{{ item }}{% endblock %}</li>
+    {% endfor %}
+
+Block Shortcuts
+---------------
+
+For blocks with few content, it's possible to use a shortcut syntax. The
+following constructs do the same:
+
+.. code-block:: jinja
+
+    {% block title %}
+        {{ page_title|title }}
+    {% endblock %}
+
+.. code-block:: jinja
+
+    {% block title page_title|title %}
+
+Dynamic Inheritance
+-------------------
+
+Twig supports dynamic inheritance by using a variable as the base template:
+
+.. code-block:: jinja
+
+    {% extends some_var %}
+
+If the variable evaluates to a ``Twig_Template`` object, Twig will use it as
+the parent template::
+
+    // {% extends layout %}
+
+    $layout = $twig->loadTemplate('some_layout_template.twig');
+
+    $twig->display('template.twig', array('layout' => $layout));
+
+.. versionadded:: 1.2
+    The possibility to pass an array of templates has been added in Twig 1.2.
+
+You can also provide a list of templates that are checked for existence. The
+first template that exists will be used as a parent:
+
+.. code-block:: jinja
+
+    {% extends ['layout.html', 'base_layout.html'] %}
+
+Conditional Inheritance
+-----------------------
+
+As the template name for the parent can be any valid Twig expression, it's
+possible to make the inheritance mechanism conditional:
+
+.. code-block:: jinja
+
+    {% extends standalone ? "minimum.html" : "base.html" %}
+
+In this example, the template will extend the "minimum.html" layout template
+if the ``standalone`` variable evaluates to ``true``, and "base.html"
+otherwise.
+
+How blocks work?
+----------------
+
+A block provides a way to change how a certain part of a template is rendered
+but it does not interfere in any way with the logic around it.
+
+Let's take the following example to illustrate how a block work and more
+importantly, how it does not work:
+
+.. code-block:: jinja
+
+    {# base.twig #}
+
+    {% for post in posts %}
+        {% block post %}
+            <h1>{{ post.title }}</h1>
+            <p>{{ post.body }}</p>
+        {% endblock %}
+    {% endfor %}
+
+If you render this template, the result would be exactly the same with or
+without the ``block`` tag. The ``block`` inside the ``for`` loop is just a way
+to make it overridable by a child template:
+
+.. code-block:: jinja
+
+    {# child.twig #}
+
+    {% extends "base.twig" %}
+
+    {% block post %}
+        <article>
+            <header>{{ post.title }}</header>
+            <section>{{ post.text }}</section>
+        </article>
+    {% endblock %}
+
+Now, when rendering the child template, the loop is going to use the block
+defined in the child template instead of the one defined in the base one; the
+executed template is then equivalent to the following one:
+
+.. code-block:: jinja
+
+    {% for post in posts %}
+        <article>
+            <header>{{ post.title }}</header>
+            <section>{{ post.text }}</section>
+        </article>
+    {% endfor %}
+
+Let's take another example: a block included within an ``if`` statement:
+
+.. code-block:: jinja
+
+    {% if posts is empty %}
+        {% block head %}
+            {{ parent() }}
+
+            <meta name="robots" content="noindex, follow">
+        {% endblock head %}
+    {% endif %}
+
+Contrary to what you might think, this template does not define a block
+conditionally; it just makes overridable by a child template the output of
+what will be rendered when the condition is ``true``.
+
+If you want the output to be displayed conditionally, use the following
+instead:
+
+.. code-block:: jinja
+
+    {% block head %}
+        {{ parent() }}
+
+        {% if posts is empty %}
+            <meta name="robots" content="noindex, follow">
+        {% endif %}
+    {% endblock head %}
+
+.. seealso:: :doc:`block<../functions/block>`, :doc:`block<../tags/block>`, :doc:`parent<../functions/parent>`, :doc:`use<../tags/use>`
diff --git a/vendor/twig/twig/doc/tags/filter.rst b/vendor/twig/twig/doc/tags/filter.rst
new file mode 100644
index 00000000..82ca5c62
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/filter.rst
@@ -0,0 +1,21 @@
+``filter``
+==========
+
+Filter sections allow you to apply regular Twig filters on a block of template
+data. Just wrap the code in the special ``filter`` section:
+
+.. code-block:: jinja
+
+    {% filter upper %}
+        This text becomes uppercase
+    {% endfilter %}
+
+You can also chain filters:
+
+.. code-block:: jinja
+
+    {% filter lower|escape %}
+        <strong>SOME TEXT</strong>
+    {% endfilter %}
+
+    {# outputs "&lt;strong&gt;some text&lt;/strong&gt;" #}
diff --git a/vendor/twig/twig/doc/tags/flush.rst b/vendor/twig/twig/doc/tags/flush.rst
new file mode 100644
index 00000000..55ef593a
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/flush.rst
@@ -0,0 +1,17 @@
+``flush``
+=========
+
+.. versionadded:: 1.5
+    The flush tag was added in Twig 1.5.
+
+The ``flush`` tag tells Twig to flush the output buffer:
+
+.. code-block:: jinja
+
+    {% flush %}
+
+.. note::
+
+    Internally, Twig uses the PHP `flush`_ function.
+
+.. _`flush`: http://php.net/flush
diff --git a/vendor/twig/twig/doc/tags/for.rst b/vendor/twig/twig/doc/tags/for.rst
new file mode 100644
index 00000000..0673b551
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/for.rst
@@ -0,0 +1,172 @@
+``for``
+=======
+
+Loop over each item in a sequence. For example, to display a list of users
+provided in a variable called ``users``:
+
+.. code-block:: jinja
+
+    <h1>Members</h1>
+    <ul>
+        {% for user in users %}
+            <li>{{ user.username|e }}</li>
+        {% endfor %}
+    </ul>
+
+.. note::
+
+    A sequence can be either an array or an object implementing the
+    ``Traversable`` interface.
+
+If you do need to iterate over a sequence of numbers, you can use the ``..``
+operator:
+
+.. code-block:: jinja
+
+    {% for i in 0..10 %}
+        * {{ i }}
+    {% endfor %}
+
+The above snippet of code would print all numbers from 0 to 10.
+
+It can be also useful with letters:
+
+.. code-block:: jinja
+
+    {% for letter in 'a'..'z' %}
+        * {{ letter }}
+    {% endfor %}
+
+The ``..`` operator can take any expression at both sides:
+
+.. code-block:: jinja
+
+    {% for letter in 'a'|upper..'z'|upper %}
+        * {{ letter }}
+    {% endfor %}
+
+.. tip:
+
+    If you need a step different from 1, you can use the ``range`` function
+    instead.
+
+The `loop` variable
+-------------------
+
+Inside of a ``for`` loop block you can access some special variables:
+
+===================== =============================================================
+Variable              Description
+===================== =============================================================
+``loop.index``        The current iteration of the loop. (1 indexed)
+``loop.index0``       The current iteration of the loop. (0 indexed)
+``loop.revindex``     The number of iterations from the end of the loop (1 indexed)
+``loop.revindex0``    The number of iterations from the end of the loop (0 indexed)
+``loop.first``        True if first iteration
+``loop.last``         True if last iteration
+``loop.length``       The number of items in the sequence
+``loop.parent``       The parent context
+===================== =============================================================
+
+.. code-block:: jinja
+
+    {% for user in users %}
+        {{ loop.index }} - {{ user.username }}
+    {% endfor %}
+
+.. note::
+
+    The ``loop.length``, ``loop.revindex``, ``loop.revindex0``, and
+    ``loop.last`` variables are only available for PHP arrays, or objects that
+    implement the ``Countable`` interface. They are also not available when
+    looping with a condition.
+
+.. versionadded:: 1.2
+    The ``if`` modifier support has been added in Twig 1.2.
+
+Adding a condition
+------------------
+
+Unlike in PHP, it's not possible to ``break`` or ``continue`` in a loop. You
+can however filter the sequence during iteration which allows you to skip
+items. The following example skips all the users which are not active:
+
+.. code-block:: jinja
+
+    <ul>
+        {% for user in users if user.active %}
+            <li>{{ user.username|e }}</li>
+        {% endfor %}
+    </ul>
+
+The advantage is that the special loop variable will count correctly thus not
+counting the users not iterated over. Keep in mind that properties like
+``loop.last`` will not be defined when using loop conditions.
+
+.. note::
+
+    Using the ``loop`` variable within the condition is not recommended as it
+    will probably not be doing what you expect it to. For instance, adding a
+    condition like ``loop.index > 4`` won't work as the index is only
+    incremented when the condition is true (so the condition will never
+    match).
+
+The `else` Clause
+-----------------
+
+If no iteration took place because the sequence was empty, you can render a
+replacement block by using ``else``:
+
+.. code-block:: jinja
+
+    <ul>
+        {% for user in users %}
+            <li>{{ user.username|e }}</li>
+        {% else %}
+            <li><em>no user found</em></li>
+        {% endfor %}
+    </ul>
+
+Iterating over Keys
+-------------------
+
+By default, a loop iterates over the values of the sequence. You can iterate
+on keys by using the ``keys`` filter:
+
+.. code-block:: jinja
+
+    <h1>Members</h1>
+    <ul>
+        {% for key in users|keys %}
+            <li>{{ key }}</li>
+        {% endfor %}
+    </ul>
+
+Iterating over Keys and Values
+------------------------------
+
+You can also access both keys and values:
+
+.. code-block:: jinja
+
+    <h1>Members</h1>
+    <ul>
+        {% for key, user in users %}
+            <li>{{ key }}: {{ user.username|e }}</li>
+        {% endfor %}
+    </ul>
+
+Iterating over a Subset
+-----------------------
+
+You might want to iterate over a subset of values. This can be achieved using
+the :doc:`slice <../filters/slice>` filter:
+
+.. code-block:: jinja
+
+    <h1>Top Ten Members</h1>
+    <ul>
+        {% for user in users|slice(0, 10) %}
+            <li>{{ user.username|e }}</li>
+        {% endfor %}
+    </ul>
diff --git a/vendor/twig/twig/doc/tags/from.rst b/vendor/twig/twig/doc/tags/from.rst
new file mode 100644
index 00000000..5337a235
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/from.rst
@@ -0,0 +1,8 @@
+``from``
+========
+
+The ``from`` tags import :doc:`macro<../tags/macro>` names into the current
+namespace. The tag is documented in detail in the documentation for the
+:doc:`import<../tags/import>` tag.
+
+.. seealso:: :doc:`macro<../tags/macro>`, :doc:`import<../tags/import>`
diff --git a/vendor/twig/twig/doc/tags/if.rst b/vendor/twig/twig/doc/tags/if.rst
new file mode 100644
index 00000000..d7a1451c
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/if.rst
@@ -0,0 +1,43 @@
+``if``
+======
+
+The ``if`` statement in Twig is comparable with the if statements of PHP.
+
+In the simplest form you can use it to test if an expression evaluates to
+``true``:
+
+.. code-block:: jinja
+
+    {% if online == false %}
+        <p>Our website is in maintenance mode. Please, come back later.</p>
+    {% endif %}
+
+You can also test if an array is not empty:
+
+.. code-block:: jinja
+
+    {% if users %}
+        <ul>
+            {% for user in users %}
+                <li>{{ user.username|e }}</li>
+            {% endfor %}
+        </ul>
+    {% endif %}
+
+.. note::
+
+    If you want to test if the variable is defined, use ``if users is
+    defined`` instead.
+
+For multiple branches ``elseif`` and ``else`` can be used like in PHP. You can use
+more complex ``expressions`` there too:
+
+.. code-block:: jinja
+
+    {% if kenny.sick %}
+        Kenny is sick.
+    {% elseif kenny.dead %}
+        You killed Kenny! You bastard!!!
+    {% else %}
+        Kenny looks okay --- so far
+    {% endif %}
diff --git a/vendor/twig/twig/doc/tags/import.rst b/vendor/twig/twig/doc/tags/import.rst
new file mode 100644
index 00000000..f6bf718e
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/import.rst
@@ -0,0 +1,57 @@
+``import``
+==========
+
+Twig supports putting often used code into :doc:`macros<../tags/macro>`. These
+macros can go into different templates and get imported from there.
+
+There are two ways to import templates. You can import the complete template
+into a variable or request specific macros from it.
+
+Imagine we have a helper module that renders forms (called ``forms.html``):
+
+.. code-block:: jinja
+
+    {% macro input(name, value, type, size) %}
+        <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />
+    {% endmacro %}
+
+    {% macro textarea(name, value, rows) %}
+        <textarea name="{{ name }}" rows="{{ rows|default(10) }}" cols="{{ cols|default(40) }}">{{ value|e }}</textarea>
+    {% endmacro %}
+
+The easiest and most flexible is importing the whole module into a variable.
+That way you can access the attributes:
+
+.. code-block:: jinja
+
+    {% import 'forms.html' as forms %}
+
+    <dl>
+        <dt>Username</dt>
+        <dd>{{ forms.input('username') }}</dd>
+        <dt>Password</dt>
+        <dd>{{ forms.input('password', null, 'password') }}</dd>
+    </dl>
+    <p>{{ forms.textarea('comment') }}</p>
+
+Alternatively you can import names from the template into the current
+namespace:
+
+.. code-block:: jinja
+
+    {% from 'forms.html' import input as input_field, textarea %}
+
+    <dl>
+        <dt>Username</dt>
+        <dd>{{ input_field('username') }}</dd>
+        <dt>Password</dt>
+        <dd>{{ input_field('password', '', 'password') }}</dd>
+    </dl>
+    <p>{{ textarea('comment') }}</p>
+
+.. tip::
+
+    To import macros from the current file, use the special ``_self`` variable
+    for the source.
+
+.. seealso:: :doc:`macro<../tags/macro>`, :doc:`from<../tags/from>`
diff --git a/vendor/twig/twig/doc/tags/include.rst b/vendor/twig/twig/doc/tags/include.rst
new file mode 100644
index 00000000..10b262de
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/include.rst
@@ -0,0 +1,86 @@
+``include``
+===========
+
+The ``include`` statement includes a template and return the rendered content
+of that file into the current namespace:
+
+.. code-block:: jinja
+
+    {% include 'header.html' %}
+        Body
+    {% include 'footer.html' %}
+
+Included templates have access to the variables of the active context.
+
+If you are using the filesystem loader, the templates are looked for in the
+paths defined by it.
+
+You can add additional variables by passing them after the ``with`` keyword:
+
+.. code-block:: jinja
+
+    {# template.html will have access to the variables from the current context and the additional ones provided #}
+    {% include 'template.html' with {'foo': 'bar'} %}
+
+    {% set vars = {'foo': 'bar'} %}
+    {% include 'template.html' with vars %}
+
+You can disable access to the context by appending the ``only`` keyword:
+
+.. code-block:: jinja
+
+    {# only the foo variable will be accessible #}
+    {% include 'template.html' with {'foo': 'bar'} only %}
+
+.. code-block:: jinja
+
+    {# no variables will be accessible #}
+    {% include 'template.html' only %}
+
+.. tip::
+
+    When including a template created by an end user, you should consider
+    sandboxing it. More information in the :doc:`Twig for Developers<../api>`
+    chapter and in the :doc:`sandbox<../tags/sandbox>` tag documentation.
+
+The template name can be any valid Twig expression:
+
+.. code-block:: jinja
+
+    {% include some_var %}
+    {% include ajax ? 'ajax.html' : 'not_ajax.html' %}
+
+And if the expression evaluates to a ``Twig_Template`` object, Twig will use it
+directly::
+
+    // {% include template %}
+
+    $template = $twig->loadTemplate('some_template.twig');
+
+    $twig->loadTemplate('template.twig')->display(array('template' => $template));
+
+.. versionadded:: 1.2
+    The ``ignore missing`` feature has been added in Twig 1.2.
+
+You can mark an include with ``ignore missing`` in which case Twig will ignore
+the statement if the template to be included does not exist. It has to be
+placed just after the template name. Here some valid examples:
+
+.. code-block:: jinja
+
+    {% include 'sidebar.html' ignore missing %}
+    {% include 'sidebar.html' ignore missing with {'foo': 'bar'} %}
+    {% include 'sidebar.html' ignore missing only %}
+
+.. versionadded:: 1.2
+    The possibility to pass an array of templates has been added in Twig 1.2.
+
+You can also provide a list of templates that are checked for existence before
+inclusion. The first template that exists will be included:
+
+.. code-block:: jinja
+
+    {% include ['page_detailed.html', 'page.html'] %}
+
+If ``ignore missing`` is given, it will fall back to rendering nothing if none
+of the templates exist, otherwise it will throw an exception.
diff --git a/vendor/twig/twig/doc/tags/index.rst b/vendor/twig/twig/doc/tags/index.rst
new file mode 100644
index 00000000..64e88644
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/index.rst
@@ -0,0 +1,24 @@
+Tags
+====
+
+.. toctree::
+    :maxdepth: 1
+
+    autoescape
+    block
+    filter
+    do
+    embed
+    extends
+    flush
+    for
+    from
+    if
+    import
+    include
+    macro
+    sandbox
+    set
+    spaceless
+    use
+    verbatim
diff --git a/vendor/twig/twig/doc/tags/macro.rst b/vendor/twig/twig/doc/tags/macro.rst
new file mode 100644
index 00000000..11c115a0
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/macro.rst
@@ -0,0 +1,83 @@
+``macro``
+=========
+
+Macros are comparable with functions in regular programming languages. They
+are useful to put often used HTML idioms into reusable elements to not repeat
+yourself.
+
+Here is a small example of a macro that renders a form element:
+
+.. code-block:: jinja
+
+    {% macro input(name, value, type, size) %}
+        <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />
+    {% endmacro %}
+
+Macros differs from native PHP functions in a few ways:
+
+* Default argument values are defined by using the ``default`` filter in the
+  macro body;
+
+* Arguments of a macro are always optional.
+
+But as with PHP functions, macros don't have access to the current template
+variables.
+
+.. tip::
+
+    You can pass the whole context as an argument by using the special
+    ``_context`` variable.
+
+Macros can be defined in any template, and need to be "imported" before being
+used (see the documentation for the :doc:`import<../tags/import>` tag for more
+information):
+
+.. code-block:: jinja
+
+    {% import "forms.html" as forms %}
+
+The above ``import`` call imports the "forms.html" file (which can contain only
+macros, or a template and some macros), and import the functions as items of
+the ``forms`` variable.
+
+The macro can then be called at will:
+
+.. code-block:: jinja
+
+    <p>{{ forms.input('username') }}</p>
+    <p>{{ forms.input('password', null, 'password') }}</p>
+
+If macros are defined and used in the same template, you can use the
+special ``_self`` variable to import them:
+
+.. code-block:: jinja
+
+    {% import _self as forms %}
+
+    <p>{{ forms.input('username') }}</p>
+
+.. warning::
+
+    When you define a macro in the template where you are going to use it, you
+    might be tempted to call the macro directly via ``_self.input()`` instead
+    of importing it; even if seems to work, this is just a side-effect of the
+    current implementation and it won't work anymore in Twig 2.x.
+
+When you want to use a macro in another macro from the same file, you need to
+import it locally:
+
+.. code-block:: jinja
+
+    {% macro input(name, value, type, size) %}
+        <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />
+    {% endmacro %}
+
+    {% macro wrapped_input(name, value, type, size) %}
+        {% import _self as forms %}
+
+        <div class="field">
+            {{ forms.input(name, value, type, size) }}
+        </div>
+    {% endmacro %}
+
+.. seealso:: :doc:`from<../tags/from>`, :doc:`import<../tags/import>`
diff --git a/vendor/twig/twig/doc/tags/sandbox.rst b/vendor/twig/twig/doc/tags/sandbox.rst
new file mode 100644
index 00000000..e186726c
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/sandbox.rst
@@ -0,0 +1,30 @@
+``sandbox``
+===========
+
+The ``sandbox`` tag can be used to enable the sandboxing mode for an included
+template, when sandboxing is not enabled globally for the Twig environment:
+
+.. code-block:: jinja
+
+    {% sandbox %}
+        {% include 'user.html' %}
+    {% endsandbox %}
+
+.. warning::
+
+    The ``sandbox`` tag is only available when the sandbox extension is
+    enabled (see the :doc:`Twig for Developers<../api>` chapter).
+
+.. note::
+
+    The ``sandbox`` tag can only be used to sandbox an include tag and it
+    cannot be used to sandbox a section of a template. The following example
+    won't work:
+
+    .. code-block:: jinja
+
+        {% sandbox %}
+            {% for i in 1..2 %}
+                {{ i }}
+            {% endfor %}
+        {% endsandbox %}
diff --git a/vendor/twig/twig/doc/tags/set.rst b/vendor/twig/twig/doc/tags/set.rst
new file mode 100644
index 00000000..3eba239a
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/set.rst
@@ -0,0 +1,78 @@
+``set``
+=======
+
+Inside code blocks you can also assign values to variables. Assignments use
+the ``set`` tag and can have multiple targets.
+
+Here is how you can assign the ``bar`` value to the ``foo`` variable:
+
+.. code-block:: jinja
+
+    {% set foo = 'bar' %}
+
+After the ``set`` call, the ``foo`` variable is available in the template like
+any other ones:
+
+.. code-block:: jinja
+
+    {# displays bar #}
+    {{ foo }}
+
+The assigned value can be any valid :ref:`Twig expressions
+<twig-expressions>`:
+
+.. code-block:: jinja
+
+    {% set foo = [1, 2] %}
+    {% set foo = {'foo': 'bar'} %}
+    {% set foo = 'foo' ~ 'bar' %}
+
+Several variables can be assigned in one block:
+
+.. code-block:: jinja
+
+    {% set foo, bar = 'foo', 'bar' %}
+
+    {# is equivalent to #}
+
+    {% set foo = 'foo' %}
+    {% set bar = 'bar' %}
+
+The ``set`` tag can also be used to 'capture' chunks of text:
+
+.. code-block:: jinja
+
+    {% set foo %}
+        <div id="pagination">
+            ...
+        </div>
+    {% endset %}
+
+.. caution::
+
+    If you enable automatic output escaping, Twig will only consider the
+    content to be safe when capturing chunks of text.
+
+.. note::
+
+    Note that loops are scoped in Twig; therefore a variable declared inside a
+    ``for`` loop is not accessible outside the loop itself:
+
+    .. code-block:: jinja
+
+        {% for item in list %}
+            {% set foo = item %}
+        {% endfor %}
+
+        {# foo is NOT available #}
+
+    If you want to access the variable, just declare it before the loop:
+
+    .. code-block:: jinja
+
+        {% set foo = "" %}
+        {% for item in list %}
+            {% set foo = item %}
+        {% endfor %}
+
+        {# foo is available #}
diff --git a/vendor/twig/twig/doc/tags/spaceless.rst b/vendor/twig/twig/doc/tags/spaceless.rst
new file mode 100644
index 00000000..12e77b25
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/spaceless.rst
@@ -0,0 +1,37 @@
+``spaceless``
+=============
+
+Use the ``spaceless`` tag to remove whitespace *between HTML tags*, not
+whitespace within HTML tags or whitespace in plain text:
+
+.. code-block:: jinja
+
+    {% spaceless %}
+        <div>
+            <strong>foo</strong>
+        </div>
+    {% endspaceless %}
+
+    {# output will be <div><strong>foo</strong></div> #}
+
+This tag is not meant to "optimize" the size of the generated HTML content but
+merely to avoid extra whitespace between HTML tags to avoid browser rendering
+quirks under some circumstances.
+
+.. tip::
+
+    If you want to optimize the size of the generated HTML content, gzip
+    compress the output instead.
+
+.. tip::
+
+    If you want to create a tag that actually removes all extra whitespace in
+    an HTML string, be warned that this is not as easy as it seems to be
+    (think of ``textarea`` or ``pre`` tags for instance). Using a third-party
+    library like Tidy is probably a better idea.
+
+.. tip::
+
+    For more information on whitespace control, read the
+    :doc:`dedicated<../templates>` section of the documentation and learn how
+    you can also use the whitespace control modifier on your tags.
diff --git a/vendor/twig/twig/doc/tags/use.rst b/vendor/twig/twig/doc/tags/use.rst
new file mode 100644
index 00000000..085f9161
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/use.rst
@@ -0,0 +1,123 @@
+``use``
+=======
+
+.. versionadded:: 1.1
+    Horizontal reuse was added in Twig 1.1.
+
+.. note::
+
+    Horizontal reuse is an advanced Twig feature that is hardly ever needed in
+    regular templates. It is mainly used by projects that need to make
+    template blocks reusable without using inheritance.
+
+Template inheritance is one of the most powerful Twig's feature but it is
+limited to single inheritance; a template can only extend one other template.
+This limitation makes template inheritance simple to understand and easy to
+debug:
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% block title %}{% endblock %}
+    {% block content %}{% endblock %}
+
+Horizontal reuse is a way to achieve the same goal as multiple inheritance,
+but without the associated complexity:
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% use "blocks.html" %}
+
+    {% block title %}{% endblock %}
+    {% block content %}{% endblock %}
+
+The ``use`` statement tells Twig to import the blocks defined in
+```blocks.html`` into the current template (it's like macros, but for blocks):
+
+.. code-block:: jinja
+
+    # blocks.html
+    {% block sidebar %}{% endblock %}
+
+In this example, the ``use`` statement imports the ``sidebar`` block into the
+main template. The code is mostly equivalent to the following one (the
+imported blocks are not outputted automatically):
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% block sidebar %}{% endblock %}
+    {% block title %}{% endblock %}
+    {% block content %}{% endblock %}
+
+.. note::
+
+    The ``use`` tag only imports a template if it does not extend another
+    template, if it does not define macros, and if the body is empty. But it
+    can *use* other templates.
+
+.. note::
+
+    Because ``use`` statements are resolved independently of the context
+    passed to the template, the template reference cannot be an expression.
+
+The main template can also override any imported block. If the template
+already defines the ``sidebar`` block, then the one defined in ``blocks.html``
+is ignored. To avoid name conflicts, you can rename imported blocks:
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% use "blocks.html" with sidebar as base_sidebar %}
+
+    {% block sidebar %}{% endblock %}
+    {% block title %}{% endblock %}
+    {% block content %}{% endblock %}
+
+.. versionadded:: 1.3
+    The ``parent()`` support was added in Twig 1.3.
+
+The ``parent()`` function automatically determines the correct inheritance
+tree, so it can be used when overriding a block defined in an imported
+template:
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% use "blocks.html" %}
+
+    {% block sidebar %}
+        {{ parent() }}
+    {% endblock %}
+
+    {% block title %}{% endblock %}
+    {% block content %}{% endblock %}
+
+In this example, ``parent()`` will correctly call the ``sidebar`` block from
+the ``blocks.html`` template.
+
+.. tip::
+
+    In Twig 1.2, renaming allows you to simulate inheritance by calling the
+    "parent" block:
+
+    .. code-block:: jinja
+
+        {% extends "base.html" %}
+
+        {% use "blocks.html" with sidebar as parent_sidebar %}
+
+        {% block sidebar %}
+            {{ block('parent_sidebar') }}
+        {% endblock %}
+
+.. note::
+
+    You can use as many ``use`` statements as you want in any given template.
+    If two imported templates define the same block, the latest one wins.
diff --git a/vendor/twig/twig/doc/tags/verbatim.rst b/vendor/twig/twig/doc/tags/verbatim.rst
new file mode 100644
index 00000000..fe61ca1b
--- /dev/null
+++ b/vendor/twig/twig/doc/tags/verbatim.rst
@@ -0,0 +1,24 @@
+``verbatim``
+============
+
+.. versionadded:: 1.12
+    The ``verbatim`` tag was added in Twig 1.12 (it was named ``raw`` before).
+
+The ``verbatim`` tag marks sections as being raw text that should not be
+parsed. For example to put Twig syntax as example into a template you can use
+this snippet:
+
+.. code-block:: jinja
+
+    {% verbatim %}
+        <ul>
+        {% for item in seq %}
+            <li>{{ item }}</li>
+        {% endfor %}
+        </ul>
+    {% endverbatim %}
+
+.. note::
+
+    The ``verbatim`` tag works in the exact same way as the old ``raw`` tag,
+    but was renamed to avoid confusion with the ``raw`` filter.
\ No newline at end of file
diff --git a/vendor/twig/twig/doc/templates.rst b/vendor/twig/twig/doc/templates.rst
new file mode 100644
index 00000000..542b8aef
--- /dev/null
+++ b/vendor/twig/twig/doc/templates.rst
@@ -0,0 +1,851 @@
+Twig for Template Designers
+===========================
+
+This document describes the syntax and semantics of the template engine and
+will be most useful as reference to those creating Twig templates.
+
+Synopsis
+--------
+
+A template is simply a text file. It can generate any text-based format (HTML,
+XML, CSV, LaTeX, etc.). It doesn't have a specific extension, ``.html`` or
+``.xml`` are just fine.
+
+A template contains **variables** or **expressions**, which get replaced with
+values when the template is evaluated, and **tags**, which control the logic
+of the template.
+
+Below is a minimal template that illustrates a few basics. We will cover the
+details later on:
+
+.. code-block:: html+jinja
+
+    <!DOCTYPE html>
+    <html>
+        <head>
+            <title>My Webpage</title>
+        </head>
+        <body>
+            <ul id="navigation">
+            {% for item in navigation %}
+                <li><a href="{{ item.href }}">{{ item.caption }}</a></li>
+            {% endfor %}
+            </ul>
+
+            <h1>My Webpage</h1>
+            {{ a_variable }}
+        </body>
+    </html>
+
+There are two kinds of delimiters: ``{% ... %}`` and ``{{ ... }}``. The first
+one is used to execute statements such as for-loops, the latter prints the
+result of an expression to the template.
+
+IDEs Integration
+----------------
+
+Many IDEs support syntax highlighting and auto-completion for Twig:
+
+* *Textmate* via the `Twig bundle`_
+* *Vim* via the `Jinja syntax plugin`_
+* *Netbeans* via the `Twig syntax plugin`_ (until 7.1, native as of 7.2)
+* *PhpStorm* (native as of 2.1)
+* *Eclipse* via the `Twig plugin`_
+* *Sublime Text* via the `Twig bundle`_
+* *GtkSourceView* via the `Twig language definition`_ (used by gedit and other projects)
+* *Coda* and *SubEthaEdit* via the `Twig syntax mode`_
+* *Coda 2* via the `other Twig syntax mode`_
+* *Komodo* and *Komodo Edit* via the Twig highlight/syntax check mode
+* *Notepad++* via the `Notepad++ Twig Highlighter`_
+* *Emacs* via `web-mode.el`_
+
+Variables
+---------
+
+The application passes variables to the templates you can mess around in the
+template. Variables may have attributes or elements on them you can access
+too. How a variable looks like heavily depends on the application providing
+those.
+
+You can use a dot (``.``) to access attributes of a variable (methods or
+properties of a PHP object, or items of a PHP array), or the so-called
+"subscript" syntax (``[]``):
+
+.. code-block:: jinja
+
+    {{ foo.bar }}
+    {{ foo['bar'] }}
+
+When the attribute contains special characters (like ``-`` that would be
+interpreted as the minus operator), use the ``attribute`` function instead to
+access the variable attribute:
+
+.. code-block:: jinja
+
+    {# equivalent to the non-working foo.data-foo #}
+    {{ attribute(foo, 'data-foo') }}
+
+.. note::
+
+    It's important to know that the curly braces are *not* part of the
+    variable but the print statement. If you access variables inside tags
+    don't put the braces around.
+
+If a variable or attribute does not exist, you will get back a ``null`` value
+when the ``strict_variables`` option is set to ``false``, otherwise Twig will
+throw an error (see :ref:`environment options<environment_options>`).
+
+.. sidebar:: Implementation
+
+    For convenience sake ``foo.bar`` does the following things on the PHP
+    layer:
+
+    * check if ``foo`` is an array and ``bar`` a valid element;
+    * if not, and if ``foo`` is an object, check that ``bar`` is a valid property;
+    * if not, and if ``foo`` is an object, check that ``bar`` is a valid method
+      (even if ``bar`` is the constructor - use ``__construct()`` instead);
+    * if not, and if ``foo`` is an object, check that ``getBar`` is a valid method;
+    * if not, and if ``foo`` is an object, check that ``isBar`` is a valid method;
+    * if not, return a ``null`` value.
+
+    ``foo['bar']`` on the other hand only works with PHP arrays:
+
+    * check if ``foo`` is an array and ``bar`` a valid element;
+    * if not, return a ``null`` value.
+
+.. note::
+
+    If you want to get a dynamic attribute on a variable, use the
+    :doc:`attribute<functions/attribute>` function instead.
+
+Global Variables
+~~~~~~~~~~~~~~~~
+
+The following variables are always available in templates:
+
+* ``_self``: references the current template;
+* ``_context``: references the current context;
+* ``_charset``: references the current charset.
+
+Setting Variables
+~~~~~~~~~~~~~~~~~
+
+You can assign values to variables inside code blocks. Assignments use the
+:doc:`set<tags/set>` tag:
+
+.. code-block:: jinja
+
+    {% set foo = 'foo' %}
+    {% set foo = [1, 2] %}
+    {% set foo = {'foo': 'bar'} %}
+
+Filters
+-------
+
+Variables can be modified by **filters**. Filters are separated from the
+variable by a pipe symbol (``|``) and may have optional arguments in
+parentheses. Multiple filters can be chained. The output of one filter is
+applied to the next.
+
+The following example removes all HTML tags from the ``name`` and title-cases
+it:
+
+.. code-block:: jinja
+
+    {{ name|striptags|title }}
+
+Filters that accept arguments have parentheses around the arguments. This
+example will join a list by commas:
+
+.. code-block:: jinja
+
+    {{ list|join(', ') }}
+
+To apply a filter on a section of code, wrap it with the
+:doc:`filter<tags/filter>` tag:
+
+.. code-block:: jinja
+
+    {% filter upper %}
+      This text becomes uppercase
+    {% endfilter %}
+
+Go to the :doc:`filters<filters/index>` page to learn more about the built-in
+filters.
+
+Functions
+---------
+
+Functions can be called to generate content. Functions are called by their
+name followed by parentheses (``()``) and may have arguments.
+
+For instance, the ``range`` function returns a list containing an arithmetic
+progression of integers:
+
+.. code-block:: jinja
+
+    {% for i in range(0, 3) %}
+        {{ i }},
+    {% endfor %}
+
+Go to the :doc:`functions<functions/index>` page to learn more about the
+built-in functions.
+
+Named Arguments
+---------------
+
+.. versionadded:: 1.12
+    Support for named arguments was added in Twig 1.12.
+
+Arguments for filters and functions can also be passed as *named arguments*:
+
+.. code-block:: jinja
+
+    {% for i in range(low=1, high=10, step=2) %}
+        {{ i }},
+    {% endfor %}
+
+Using named arguments makes your templates more explicit about the meaning of
+the values you pass as arguments:
+
+.. code-block:: jinja
+
+    {{ data|convert_encoding('UTF-8', 'iso-2022-jp') }}
+
+    {# versus #}
+
+    {{ data|convert_encoding(from='iso-2022-jp', to='UTF-8') }}
+
+Named arguments also allow you to skip some arguments for which you don't want
+to change the default value:
+
+.. code-block:: jinja
+
+    {# the first argument is the date format, which defaults to the global date format if null is passed #}
+    {{ "now"|date(null, "Europe/Paris") }}
+
+    {# or skip the format value by using a named argument for the timezone #}
+    {{ "now"|date(timezone="Europe/Paris") }}
+
+You can also use both positional and named arguments in one call, in which
+case positional arguments must always come before named arguments:
+
+.. code-block:: jinja
+
+    {{ "now"|date('d/m/Y H:i', timezone="Europe/Paris") }}
+
+.. tip::
+
+    Each function and filter documentation page has a section where the names
+    of all arguments are listed when supported.
+
+Control Structure
+-----------------
+
+A control structure refers to all those things that control the flow of a
+program - conditionals (i.e. ``if``/``elseif``/``else``), ``for``-loops, as
+well as things like blocks. Control structures appear inside ``{% ... %}``
+blocks.
+
+For example, to display a list of users provided in a variable called
+``users``, use the :doc:`for<tags/for>` tag:
+
+.. code-block:: jinja
+
+    <h1>Members</h1>
+    <ul>
+        {% for user in users %}
+            <li>{{ user.username|e }}</li>
+        {% endfor %}
+    </ul>
+
+The :doc:`if<tags/if>` tag can be used to test an expression:
+
+.. code-block:: jinja
+
+    {% if users|length > 0 %}
+        <ul>
+            {% for user in users %}
+                <li>{{ user.username|e }}</li>
+            {% endfor %}
+        </ul>
+    {% endif %}
+
+Go to the :doc:`tags<tags/index>` page to learn more about the built-in tags.
+
+Comments
+--------
+
+To comment-out part of a line in a template, use the comment syntax ``{# ...
+#}``. This is useful for debugging or to add information for other template
+designers or yourself:
+
+.. code-block:: jinja
+
+    {# note: disabled template because we no longer use this
+        {% for user in users %}
+            ...
+        {% endfor %}
+    #}
+
+Including other Templates
+-------------------------
+
+The :doc:`include<tags/include>` tag is useful to include a template and
+return the rendered content of that template into the current one:
+
+.. code-block:: jinja
+
+    {% include 'sidebar.html' %}
+
+Per default included templates are passed the current context.
+
+The context that is passed to the included template includes variables defined
+in the template:
+
+.. code-block:: jinja
+
+    {% for box in boxes %}
+        {% include "render_box.html" %}
+    {% endfor %}
+
+The included template ``render_box.html`` is able to access ``box``.
+
+The filename of the template depends on the template loader. For instance, the
+``Twig_Loader_Filesystem`` allows you to access other templates by giving the
+filename. You can access templates in subdirectories with a slash:
+
+.. code-block:: jinja
+
+    {% include "sections/articles/sidebar.html" %}
+
+This behavior depends on the application embedding Twig.
+
+Template Inheritance
+--------------------
+
+The most powerful part of Twig is template inheritance. Template inheritance
+allows you to build a base "skeleton" template that contains all the common
+elements of your site and defines **blocks** that child templates can
+override.
+
+Sounds complicated but is very basic. It's easier to understand it by
+starting with an example.
+
+Let's define a base template, ``base.html``, which defines a simple HTML
+skeleton document that you might use for a simple two-column page:
+
+.. code-block:: html+jinja
+
+    <!DOCTYPE html>
+    <html>
+        <head>
+            {% block head %}
+                <link rel="stylesheet" href="style.css" />
+                <title>{% block title %}{% endblock %} - My Webpage</title>
+            {% endblock %}
+        </head>
+        <body>
+            <div id="content">{% block content %}{% endblock %}</div>
+            <div id="footer">
+                {% block footer %}
+                    &copy; Copyright 2011 by <a href="http://domain.invalid/">you</a>.
+                {% endblock %}
+            </div>
+        </body>
+    </html>
+
+In this example, the :doc:`block<tags/block>` tags define four blocks that
+child templates can fill in. All the ``block`` tag does is to tell the
+template engine that a child template may override those portions of the
+template.
+
+A child template might look like this:
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+
+    {% block title %}Index{% endblock %}
+    {% block head %}
+        {{ parent() }}
+        <style type="text/css">
+            .important { color: #336699; }
+        </style>
+    {% endblock %}
+    {% block content %}
+        <h1>Index</h1>
+        <p class="important">
+            Welcome to my awesome homepage.
+        </p>
+    {% endblock %}
+
+The :doc:`extends<tags/extends>` tag is the key here. It tells the template
+engine that this template "extends" another template. When the template system
+evaluates this template, first it locates the parent. The extends tag should
+be the first tag in the template.
+
+Note that since the child template doesn't define the ``footer`` block, the
+value from the parent template is used instead.
+
+It's possible to render the contents of the parent block by using the
+:doc:`parent<functions/parent>` function. This gives back the results of the
+parent block:
+
+.. code-block:: jinja
+
+    {% block sidebar %}
+        <h3>Table Of Contents</h3>
+        ...
+        {{ parent() }}
+    {% endblock %}
+
+.. tip::
+
+    The documentation page for the :doc:`extends<tags/extends>` tag describes
+    more advanced features like block nesting, scope, dynamic inheritance, and
+    conditional inheritance.
+
+.. note::
+
+    Twig also supports multiple inheritance with the so called horizontal reuse
+    with the help of the :doc:`use<tags/use>` tag. This is an advanced feature
+    hardly ever needed in regular templates.
+
+HTML Escaping
+-------------
+
+When generating HTML from templates, there's always a risk that a variable
+will include characters that affect the resulting HTML. There are two
+approaches: manually escaping each variable or automatically escaping
+everything by default.
+
+Twig supports both, automatic escaping is enabled by default.
+
+.. note::
+
+    Automatic escaping is only supported if the *escaper* extension has been
+    enabled (which is the default).
+
+Working with Manual Escaping
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If manual escaping is enabled, it is **your** responsibility to escape
+variables if needed. What to escape? Any variable you don't trust.
+
+Escaping works by piping the variable through the
+:doc:`escape<filters/escape>` or ``e`` filter:
+
+.. code-block:: jinja
+
+    {{ user.username|e }}
+
+By default, the ``escape`` filter uses the ``html`` strategy, but depending on
+the escaping context, you might want to explicitly use any other available
+strategies:
+
+.. code-block:: jinja
+
+    {{ user.username|e('js') }}
+    {{ user.username|e('css') }}
+    {{ user.username|e('url') }}
+    {{ user.username|e('html_attr') }}
+
+Working with Automatic Escaping
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Whether automatic escaping is enabled or not, you can mark a section of a
+template to be escaped or not by using the :doc:`autoescape<tags/autoescape>`
+tag:
+
+.. code-block:: jinja
+
+    {% autoescape %}
+        Everything will be automatically escaped in this block (using the HTML strategy)
+    {% endautoescape %}
+
+By default, auto-escaping uses the ``html`` escaping strategy. If you output
+variables in other contexts, you need to explicitly escape them with the
+appropriate escaping strategy:
+
+.. code-block:: jinja
+
+    {% autoescape 'js' %}
+        Everything will be automatically escaped in this block (using the JS strategy)
+    {% endautoescape %}
+
+Escaping
+--------
+
+It is sometimes desirable or even necessary to have Twig ignore parts it would
+otherwise handle as variables or blocks. For example if the default syntax is
+used and you want to use ``{{`` as raw string in the template and not start a
+variable you have to use a trick.
+
+The easiest way is to output the variable delimiter (``{{``) by using a variable
+expression:
+
+.. code-block:: jinja
+
+    {{ '{{' }}
+
+For bigger sections it makes sense to mark a block
+:doc:`verbatim<tags/verbatim>`.
+
+Macros
+------
+
+.. versionadded:: 1.12
+    Support for default argument values was added in Twig 1.12.
+
+Macros are comparable with functions in regular programming languages. They
+are useful to reuse often used HTML fragments to not repeat yourself.
+
+A macro is defined via the :doc:`macro<tags/macro>` tag. Here is a small example
+(subsequently called ``forms.html``) of a macro that renders a form element:
+
+.. code-block:: jinja
+
+    {% macro input(name, value, type, size) %}
+        <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />
+    {% endmacro %}
+
+Macros can be defined in any template, and need to be "imported" via the
+:doc:`import<tags/import>` tag before being used:
+
+.. code-block:: jinja
+
+    {% import "forms.html" as forms %}
+
+    <p>{{ forms.input('username') }}</p>
+
+Alternatively, you can import individual macro names from a template into the
+current namespace via the :doc:`from<tags/from>` tag and optionally alias them:
+
+.. code-block:: jinja
+
+    {% from 'forms.html' import input as input_field %}
+
+    <dl>
+        <dt>Username</dt>
+        <dd>{{ input_field('username') }}</dd>
+        <dt>Password</dt>
+        <dd>{{ input_field('password', '', 'password') }}</dd>
+    </dl>
+
+A default value can also be defined for macro arguments when not provided in a
+macro call:
+
+.. code-block:: jinja
+
+    {% macro input(name, value = "", type = "text", size = 20) %}
+        <input type="{{ type }}" name="{{ name }}" value="{{ value|e }}" size="{{ size }}" />
+    {% endmacro %}
+
+.. _twig-expressions:
+
+Expressions
+-----------
+
+Twig allows expressions everywhere. These work very similar to regular PHP and
+even if you're not working with PHP you should feel comfortable with it.
+
+.. note::
+
+    The operator precedence is as follows, with the lowest-precedence
+    operators listed first: ``b-and``, ``b-xor``, ``b-or``, ``or``, ``and``,
+    ``==``, ``!=``, ``<``, ``>``, ``>=``, ``<=``, ``in``, ``..``, ``+``,
+    ``-``, ``~``, ``*``, ``/``, ``//``, ``%``, ``is``, ``**``, ``|``, ``[]``,
+    and ``.``:
+
+    .. code-block:: jinja
+
+        {% set greeting = 'Hello' %}
+        {% set name = 'Fabien' %}
+
+        {{ greeting ~ name|lower }}   {# Hello fabien #}
+
+        {# use parenthesis to change precedence #}
+        {{ (greeting ~ name)|lower }} {# hello fabien #}
+
+Literals
+~~~~~~~~
+
+.. versionadded:: 1.5
+    Support for hash keys as names and expressions was added in Twig 1.5.
+
+The simplest form of expressions are literals. Literals are representations
+for PHP types such as strings, numbers, and arrays. The following literals
+exist:
+
+* ``"Hello World"``: Everything between two double or single quotes is a
+  string. They are useful whenever you need a string in the template (for
+  example as arguments to function calls, filters or just to extend or include
+  a template). A string can contain a delimiter if it is preceded by a
+  backslash (``\``) -- like in ``'It\'s good'``.
+
+* ``42`` / ``42.23``: Integers and floating point numbers are created by just
+  writing the number down. If a dot is present the number is a float,
+  otherwise an integer.
+
+* ``["foo", "bar"]``: Arrays are defined by a sequence of expressions
+  separated by a comma (``,``) and wrapped with squared brackets (``[]``).
+
+* ``{"foo": "bar"}``: Hashes are defined by a list of keys and values
+  separated by a comma (``,``) and wrapped with curly braces (``{}``):
+
+  .. code-block:: jinja
+
+    {# keys as string #}
+    { 'foo': 'foo', 'bar': 'bar' }
+
+    {# keys as names (equivalent to the previous hash) -- as of Twig 1.5 #}
+    { foo: 'foo', bar: 'bar' }
+
+    {# keys as integer #}
+    { 2: 'foo', 4: 'bar' }
+
+    {# keys as expressions (the expression must be enclosed into parentheses) -- as of Twig 1.5 #}
+    { (1 + 1): 'foo', (a ~ 'b'): 'bar' }
+
+* ``true`` / ``false``: ``true`` represents the true value, ``false``
+  represents the false value.
+
+* ``null``: ``null`` represents no specific value. This is the value returned
+  when a variable does not exist. ``none`` is an alias for ``null``.
+
+Arrays and hashes can be nested:
+
+.. code-block:: jinja
+
+    {% set foo = [1, {"foo": "bar"}] %}
+
+.. tip::
+
+    Using double-quoted or single-quoted strings has no impact on performance
+    but string interpolation is only supported in double-quoted strings.
+
+Math
+~~~~
+
+Twig allows you to calculate with values. This is rarely useful in templates
+but exists for completeness' sake. The following operators are supported:
+
+* ``+``: Adds two objects together (the operands are casted to numbers). ``{{
+  1 + 1 }}`` is ``2``.
+
+* ``-``: Subtracts the second number from the first one. ``{{ 3 - 2 }}`` is
+  ``1``.
+
+* ``/``: Divides two numbers. The returned value will be a floating point
+  number. ``{{ 1 / 2 }}`` is ``{{ 0.5 }}``.
+
+* ``%``: Calculates the remainder of an integer division. ``{{ 11 % 7 }}`` is
+  ``4``.
+
+* ``//``: Divides two numbers and returns the truncated integer result. ``{{
+  20 // 7 }}`` is ``2``.
+
+* ``*``: Multiplies the left operand with the right one. ``{{ 2 * 2 }}`` would
+  return ``4``.
+
+* ``**``: Raises the left operand to the power of the right operand. ``{{ 2 **
+  3 }}`` would return ``8``.
+
+Logic
+~~~~~
+
+You can combine multiple expressions with the following operators:
+
+* ``and``: Returns true if the left and the right operands are both true.
+
+* ``or``: Returns true if the left or the right operand is true.
+
+* ``not``: Negates a statement.
+
+* ``(expr)``: Groups an expression.
+
+.. note::
+
+    Twig also support bitwise operators (``b-and``, ``b-xor``, and ``b-or``).
+
+Comparisons
+~~~~~~~~~~~
+
+The following comparison operators are supported in any expression: ``==``,
+``!=``, ``<``, ``>``, ``>=``, and ``<=``.
+
+Containment Operator
+~~~~~~~~~~~~~~~~~~~~
+
+The ``in`` operator performs containment test.
+
+It returns ``true`` if the left operand is contained in the right:
+
+.. code-block:: jinja
+
+    {# returns true #}
+
+    {{ 1 in [1, 2, 3] }}
+
+    {{ 'cd' in 'abcde' }}
+
+.. tip::
+
+    You can use this filter to perform a containment test on strings, arrays,
+    or objects implementing the ``Traversable`` interface.
+
+To perform a negative test, use the ``not in`` operator:
+
+.. code-block:: jinja
+
+    {% if 1 not in [1, 2, 3] %}
+
+    {# is equivalent to #}
+    {% if not (1 in [1, 2, 3]) %}
+
+Test Operator
+~~~~~~~~~~~~~
+
+The ``is`` operator performs tests. Tests can be used to test a variable against
+a common expression. The right operand is name of the test:
+
+.. code-block:: jinja
+
+    {# find out if a variable is odd #}
+
+    {{ name is odd }}
+
+Tests can accept arguments too:
+
+.. code-block:: jinja
+
+    {% if loop.index is divisibleby(3) %}
+
+Tests can be negated by using the ``is not`` operator:
+
+.. code-block:: jinja
+
+    {% if loop.index is not divisibleby(3) %}
+
+    {# is equivalent to #}
+    {% if not (loop.index is divisibleby(3)) %}
+
+Go to the :doc:`tests<tests/index>` page to learn more about the built-in
+tests.
+
+Other Operators
+~~~~~~~~~~~~~~~
+
+.. versionadded:: 1.12.0
+    Support for the extended ternary operator was added in Twig 1.12.0.
+
+The following operators are very useful but don't fit into any of the other
+categories:
+
+* ``..``: Creates a sequence based on the operand before and after the
+  operator (this is just syntactic sugar for the :doc:`range<functions/range>`
+  function).
+
+* ``|``: Applies a filter.
+
+* ``~``: Converts all operands into strings and concatenates them. ``{{ "Hello
+  " ~ name ~ "!" }}`` would return (assuming ``name`` is ``'John'``) ``Hello
+  John!``.
+
+* ``.``, ``[]``: Gets an attribute of an object.
+
+* ``?:``: The ternary operator:
+
+  .. code-block:: jinja
+
+      {{ foo ? 'yes' : 'no' }}
+
+      {# as of Twig 1.12.0 #}
+      {{ foo ?: 'no' }} == {{ foo ? foo : 'no' }}
+      {{ foo ? 'yes' }} == {{ foo ? 'yes' : '' }}
+
+String Interpolation
+~~~~~~~~~~~~~~~~~~~~
+
+.. versionadded:: 1.5
+    String interpolation was added in Twig 1.5.
+
+String interpolation (`#{expression}`) allows any valid expression to appear
+within a *double-quoted string*. The result of evaluating that expression is
+inserted into the string:
+
+.. code-block:: jinja
+
+    {{ "foo #{bar} baz" }}
+    {{ "foo #{1 + 2} baz" }}
+
+Whitespace Control
+------------------
+
+.. versionadded:: 1.1
+    Tag level whitespace control was added in Twig 1.1.
+
+The first newline after a template tag is removed automatically (like in PHP.)
+Whitespace is not further modified by the template engine, so each whitespace
+(spaces, tabs, newlines etc.) is returned unchanged.
+
+Use the ``spaceless`` tag to remove whitespace *between HTML tags*:
+
+.. code-block:: jinja
+
+    {% spaceless %}
+        <div>
+            <strong>foo bar</strong>
+        </div>
+    {% endspaceless %}
+
+    {# output will be <div><strong>foo bar</strong></div> #}
+
+In addition to the spaceless tag you can also control whitespace on a per tag
+level. By using the whitespace control modifier on your tags, you can trim
+leading and or trailing whitespace:
+
+.. code-block:: jinja
+
+    {% set value = 'no spaces' %}
+    {#- No leading/trailing whitespace -#}
+    {%- if true -%}
+        {{- value -}}
+    {%- endif -%}
+
+    {# output 'no spaces' #}
+
+The above sample shows the default whitespace control modifier, and how you can
+use it to remove whitespace around tags.  Trimming space will consume all whitespace
+for that side of the tag.  It is possible to use whitespace trimming on one side
+of a tag:
+
+.. code-block:: jinja
+
+    {% set value = 'no spaces' %}
+    <li>    {{- value }}    </li>
+
+    {# outputs '<li>no spaces    </li>' #}
+
+Extensions
+----------
+
+Twig can be easily extended.
+
+If you are looking for new tags, filters, or functions, have a look at the Twig official
+`extension repository`_.
+
+If you want to create your own, read the :ref:`Creating an
+Extension<creating_extensions>` chapter.
+
+.. _`Twig bundle`:                https://github.com/Anomareh/PHP-Twig.tmbundle
+.. _`Jinja syntax plugin`:        http://jinja.pocoo.org/2/documentation/integration
+.. _`Twig syntax plugin`:         http://plugins.netbeans.org/plugin/37069/php-twig
+.. _`Twig plugin`:                https://github.com/pulse00/Twig-Eclipse-Plugin
+.. _`Twig language definition`:   https://github.com/gabrielcorpse/gedit-twig-template-language
+.. _`extension repository`:       http://github.com/fabpot/Twig-extensions
+.. _`Twig syntax mode`:           https://github.com/bobthecow/Twig-HTML.mode
+.. _`other Twig syntax mode`:     https://github.com/muxx/Twig-HTML.mode
+.. _`Notepad++ Twig Highlighter`: https://github.com/Banane9/notepadplusplus-twig
+.. _`web-mode.el`:                http://web-mode.org/
diff --git a/vendor/twig/twig/doc/tests/constant.rst b/vendor/twig/twig/doc/tests/constant.rst
new file mode 100644
index 00000000..8d0724a8
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/constant.rst
@@ -0,0 +1,22 @@
+``constant``
+============
+
+.. versionadded: 1.13.1
+    constant now accepts object instances as the second argument.
+
+``constant`` checks if a variable has the exact same value as a constant. You
+can use either global constants or class constants:
+
+.. code-block:: jinja
+
+    {% if post.status is constant('Post::PUBLISHED') %}
+        the status attribute is exactly the same as Post::PUBLISHED
+    {% endif %}
+
+You can test constants from object instances as well:
+
+.. code-block:: jinja
+
+    {% if post.status is constant('PUBLISHED', post) %}
+        the status attribute is exactly the same as Post::PUBLISHED
+    {% endif %}
diff --git a/vendor/twig/twig/doc/tests/defined.rst b/vendor/twig/twig/doc/tests/defined.rst
new file mode 100644
index 00000000..702ce725
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/defined.rst
@@ -0,0 +1,30 @@
+``defined``
+===========
+
+``defined`` checks if a variable is defined in the current context. This is very
+useful if you use the ``strict_variables`` option:
+
+.. code-block:: jinja
+
+    {# defined works with variable names #}
+    {% if foo is defined %}
+        ...
+    {% endif %}
+
+    {# and attributes on variables names #}
+    {% if foo.bar is defined %}
+        ...
+    {% endif %}
+
+    {% if foo['bar'] is defined %}
+        ...
+    {% endif %}
+
+When using the ``defined`` test on an expression that uses variables in some
+method calls, be sure that they are all defined first:
+
+.. code-block:: jinja
+
+    {% if var is defined and foo.method(var) is defined %}
+        ...
+    {% endif %}
diff --git a/vendor/twig/twig/doc/tests/divisibleby.rst b/vendor/twig/twig/doc/tests/divisibleby.rst
new file mode 100644
index 00000000..9b0b9644
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/divisibleby.rst
@@ -0,0 +1,10 @@
+``divisibleby``
+===============
+
+``divisibleby`` checks if a variable is divisible by a number:
+
+.. code-block:: jinja
+
+    {% if loop.index is divisibleby(3) %}
+        ...
+    {% endif %}
diff --git a/vendor/twig/twig/doc/tests/empty.rst b/vendor/twig/twig/doc/tests/empty.rst
new file mode 100644
index 00000000..e5b55999
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/empty.rst
@@ -0,0 +1,11 @@
+``empty``
+=========
+
+``empty`` checks if a variable is empty:
+
+.. code-block:: jinja
+
+    {# evaluates to true if the foo variable is null, false, an empty array, or the empty string #}
+    {% if foo is empty %}
+        ...
+    {% endif %}
diff --git a/vendor/twig/twig/doc/tests/even.rst b/vendor/twig/twig/doc/tests/even.rst
new file mode 100644
index 00000000..6ab5cc39
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/even.rst
@@ -0,0 +1,10 @@
+``even``
+========
+
+``even`` returns ``true`` if the given number is even:
+
+.. code-block:: jinja
+
+    {{ var is even }}
+
+.. seealso:: :doc:`odd<../tests/odd>`
diff --git a/vendor/twig/twig/doc/tests/index.rst b/vendor/twig/twig/doc/tests/index.rst
new file mode 100644
index 00000000..c63208ee
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/index.rst
@@ -0,0 +1,15 @@
+Tests
+=====
+
+.. toctree::
+    :maxdepth: 1
+
+    constant
+    defined
+    divisibleby
+    empty
+    even
+    iterable
+    null
+    odd
+    sameas
diff --git a/vendor/twig/twig/doc/tests/iterable.rst b/vendor/twig/twig/doc/tests/iterable.rst
new file mode 100644
index 00000000..89a172f7
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/iterable.rst
@@ -0,0 +1,19 @@
+``iterable``
+============
+
+.. versionadded:: 1.7
+    The iterable test was added in Twig 1.7.
+
+``iterable`` checks if a variable is an array or a traversable object:
+
+.. code-block:: jinja
+
+    {# evaluates to true if the foo variable is iterable #}
+    {% if users is iterable %}
+        {% for user in users %}
+            Hello {{ user }}!
+        {% endfor %}
+    {% else %}
+        {# users is probably a string #}
+        Hello {{ users }}!
+    {% endif %}
diff --git a/vendor/twig/twig/doc/tests/null.rst b/vendor/twig/twig/doc/tests/null.rst
new file mode 100644
index 00000000..44eec62e
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/null.rst
@@ -0,0 +1,12 @@
+``null``
+========
+
+``null`` returns ``true`` if the variable is ``null``:
+
+.. code-block:: jinja
+
+    {{ var is null }}
+
+.. note::
+
+    ``none`` is an alias for ``null``.
diff --git a/vendor/twig/twig/doc/tests/odd.rst b/vendor/twig/twig/doc/tests/odd.rst
new file mode 100644
index 00000000..9eece777
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/odd.rst
@@ -0,0 +1,10 @@
+``odd``
+=======
+
+``odd`` returns ``true`` if the given number is odd:
+
+.. code-block:: jinja
+
+    {{ var is odd }}
+
+.. seealso:: :doc:`even<../tests/even>`
diff --git a/vendor/twig/twig/doc/tests/sameas.rst b/vendor/twig/twig/doc/tests/sameas.rst
new file mode 100644
index 00000000..efb15c35
--- /dev/null
+++ b/vendor/twig/twig/doc/tests/sameas.rst
@@ -0,0 +1,11 @@
+``sameas``
+==========
+
+``sameas`` checks if a variable points to the same memory address than another
+variable:
+
+.. code-block:: jinja
+
+    {% if foo.attribute is sameas(false) %}
+        the foo attribute really is the ``false`` PHP value
+    {% endif %}
diff --git a/vendor/twig/twig/ext/twig/.gitignore b/vendor/twig/twig/ext/twig/.gitignore
new file mode 100644
index 00000000..56ea76cc
--- /dev/null
+++ b/vendor/twig/twig/ext/twig/.gitignore
@@ -0,0 +1,30 @@
+*.sw*
+.deps
+Makefile
+Makefile.fragments
+Makefile.global
+Makefile.objects
+acinclude.m4
+aclocal.m4
+build/
+config.cache
+config.guess
+config.h
+config.h.in
+config.log
+config.nice
+config.status
+config.sub
+configure
+configure.in
+install-sh
+libtool
+ltmain.sh
+missing
+mkinstalldirs
+run-tests.php
+twig.loT
+.libs/
+modules/
+twig.la
+twig.lo
diff --git a/vendor/twig/twig/ext/twig/LICENSE b/vendor/twig/twig/ext/twig/LICENSE
new file mode 100644
index 00000000..66b8bb4c
--- /dev/null
+++ b/vendor/twig/twig/ext/twig/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2011, Derick Rethans <derick@derickrethans.nl>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, 
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright 
+      notice, this list of conditions and the following disclaimer in the 
+      documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/twig/twig/ext/twig/config.m4 b/vendor/twig/twig/ext/twig/config.m4
new file mode 100644
index 00000000..83486be4
--- /dev/null
+++ b/vendor/twig/twig/ext/twig/config.m4
@@ -0,0 +1,8 @@
+dnl config.m4 for extension twig
+
+PHP_ARG_ENABLE(twig, whether to enable twig support,
+[  --enable-twig           Enable twig support])
+
+if test "$PHP_TWIG" != "no"; then
+  PHP_NEW_EXTENSION(twig, twig.c, $ext_shared)
+fi
diff --git a/vendor/twig/twig/ext/twig/config.w32 b/vendor/twig/twig/ext/twig/config.w32
new file mode 100644
index 00000000..cb287b99
--- /dev/null
+++ b/vendor/twig/twig/ext/twig/config.w32
@@ -0,0 +1,8 @@
+// vim:ft=javascript
+
+ARG_ENABLE("twig", "Twig support", "no");
+
+if (PHP_TWIG != "no") {
+        AC_DEFINE('HAVE_TWIG', 1);
+        EXTENSION('twig', 'twig.c');
+}
diff --git a/vendor/twig/twig/ext/twig/php_twig.h b/vendor/twig/twig/ext/twig/php_twig.h
new file mode 100644
index 00000000..1cf0ad44
--- /dev/null
+++ b/vendor/twig/twig/ext/twig/php_twig.h
@@ -0,0 +1,31 @@
+/*
+   +----------------------------------------------------------------------+
+   | Twig Extension                                                       |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 2011 Derick Rethans                                    |
+   +----------------------------------------------------------------------+
+   | Redistribution and use in source and binary forms, with or without   |
+   | modification, are permitted provided that the conditions mentioned   |
+   | in the accompanying LICENSE file are met (BSD, revised).             |
+   +----------------------------------------------------------------------+
+   | Author: Derick Rethans <derick@derickrethans.nl>                     |
+   +----------------------------------------------------------------------+
+ */
+
+#ifndef PHP_TWIG_H
+#define PHP_TWIG_H
+
+#define PHP_TWIG_VERSION "1.13.2"
+
+#include "php.h"
+
+extern zend_module_entry twig_module_entry;
+#define phpext_twig_ptr &twig_module_entry
+
+#ifdef ZTS
+#include "TSRM.h"
+#endif
+
+PHP_FUNCTION(twig_template_get_attributes);
+
+#endif
diff --git a/vendor/twig/twig/ext/twig/twig.c b/vendor/twig/twig/ext/twig/twig.c
new file mode 100644
index 00000000..3ba9ff2c
--- /dev/null
+++ b/vendor/twig/twig/ext/twig/twig.c
@@ -0,0 +1,1076 @@
+/*
+   +----------------------------------------------------------------------+
+   | Twig Extension                                                       |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 2011 Derick Rethans                                    |
+   +----------------------------------------------------------------------+
+   | Redistribution and use in source and binary forms, with or without   |
+   | modification, are permitted provided that the conditions mentioned   |
+   | in the accompanying LICENSE file are met (BSD, revised).             |
+   +----------------------------------------------------------------------+
+   | Author: Derick Rethans <derick@derickrethans.nl>                     |
+   +----------------------------------------------------------------------+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "php.h"
+#include "php_twig.h"
+#include "ext/standard/php_string.h"
+#include "ext/standard/php_smart_str.h"
+
+#include "Zend/zend_object_handlers.h"
+#include "Zend/zend_interfaces.h"
+#include "Zend/zend_exceptions.h"
+
+#ifndef Z_ADDREF_P
+#define Z_ADDREF_P(pz)                (pz)->refcount++
+#endif
+
+#define FREE_DTOR(z)    \
+        zval_dtor(z);           \
+        efree(z);
+
+#if PHP_VERSION_ID >= 50300
+        #define APPLY_TSRMLS_DC TSRMLS_DC
+        #define APPLY_TSRMLS_CC TSRMLS_CC
+        #define APPLY_TSRMLS_FETCH()
+#else
+        #define APPLY_TSRMLS_DC
+        #define APPLY_TSRMLS_CC
+        #define APPLY_TSRMLS_FETCH() TSRMLS_FETCH()
+#endif
+
+ZEND_BEGIN_ARG_INFO_EX(twig_template_get_attribute_args, ZEND_SEND_BY_VAL, ZEND_RETURN_VALUE, 6)
+        ZEND_ARG_INFO(0, template)
+        ZEND_ARG_INFO(0, object)
+        ZEND_ARG_INFO(0, item)
+        ZEND_ARG_INFO(0, arguments)
+        ZEND_ARG_INFO(0, type)
+        ZEND_ARG_INFO(0, isDefinedTest)
+ZEND_END_ARG_INFO()
+
+zend_function_entry twig_functions[] = {
+        PHP_FE(twig_template_get_attributes, twig_template_get_attribute_args)
+        {NULL, NULL, NULL}
+};
+
+
+zend_module_entry twig_module_entry = {
+        STANDARD_MODULE_HEADER,
+        "twig",
+        twig_functions,
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        PHP_TWIG_VERSION,
+        STANDARD_MODULE_PROPERTIES
+};
+
+
+#ifdef COMPILE_DL_TWIG
+ZEND_GET_MODULE(twig)
+#endif
+
+int TWIG_ARRAY_KEY_EXISTS(zval *array, zval *key)
+{
+        zval temp;
+        int result;
+
+        if (Z_TYPE_P(array) != IS_ARRAY) {
+                return 0;
+        }
+
+        switch (Z_TYPE_P(key)) {
+                case IS_NULL:
+                        return zend_hash_exists(Z_ARRVAL_P(array), "", 1);
+
+                case IS_BOOL:
+                case IS_DOUBLE:
+                        convert_to_long(key);
+                case IS_LONG:
+                        return zend_hash_index_exists(Z_ARRVAL_P(array), Z_LVAL_P(key));
+
+                default:
+                        convert_to_string(key);
+                        return zend_symtable_exists(Z_ARRVAL_P(array), Z_STRVAL_P(key), Z_STRLEN_P(key) + 1);
+        }
+}
+
+int TWIG_INSTANCE_OF(zval *object, zend_class_entry *interface TSRMLS_DC)
+{
+        if (Z_TYPE_P(object) != IS_OBJECT) {
+                return 0;
+        }
+        return instanceof_function(Z_OBJCE_P(object), interface TSRMLS_CC);
+}
+
+int TWIG_INSTANCE_OF_USERLAND(zval *object, char *interface TSRMLS_DC)
+{
+        zend_class_entry **pce;
+        if (Z_TYPE_P(object) != IS_OBJECT) {
+                return 0;
+        }
+        if (zend_lookup_class(interface, strlen(interface), &pce TSRMLS_CC) == FAILURE) {
+                return 0;
+        }
+        return instanceof_function(Z_OBJCE_P(object), *pce TSRMLS_CC);
+}
+
+zval *TWIG_GET_ARRAYOBJECT_ELEMENT(zval *object, zval *offset TSRMLS_DC)
+{
+        zend_class_entry *ce = Z_OBJCE_P(object);
+        zval *retval;
+
+        if (Z_TYPE_P(object) == IS_OBJECT) {
+                SEPARATE_ARG_IF_REF(offset);
+                zend_call_method_with_1_params(&object, ce, NULL, "offsetget", &retval, offset);
+
+                zval_ptr_dtor(&offset);
+
+                if (!retval) {
+                        if (!EG(exception)) {
+                                zend_error(E_ERROR, "Undefined offset for object of type %s used as array", ce->name);
+                        }
+                        return NULL;
+                }
+
+                return retval;
+        }
+        return NULL;
+}
+
+int TWIG_ISSET_ARRAYOBJECT_ELEMENT(zval *object, zval *offset TSRMLS_DC)
+{
+        zend_class_entry *ce = Z_OBJCE_P(object);
+        zval *retval;
+
+        if (Z_TYPE_P(object) == IS_OBJECT) {
+                SEPARATE_ARG_IF_REF(offset);
+                zend_call_method_with_1_params(&object, ce, NULL, "offsetexists", &retval, offset);
+
+                zval_ptr_dtor(&offset);
+
+                if (!retval) {
+                        if (!EG(exception)) {
+                                zend_error(E_ERROR, "Undefined offset for object of type %s used as array", ce->name);
+                        }
+                        return 0;
+                }
+
+                return (retval && Z_TYPE_P(retval) == IS_BOOL && Z_LVAL_P(retval));
+        }
+        return 0;
+}
+
+char *TWIG_STRTOLOWER(const char *str, int str_len)
+{
+        char *item_dup;
+
+        item_dup = estrndup(str, str_len);
+        php_strtolower(item_dup, str_len);
+        return item_dup;
+}
+
+zval *TWIG_CALL_USER_FUNC_ARRAY(zval *object, char *function, zval *arguments TSRMLS_DC)
+{
+        zend_fcall_info fci;
+        zval ***args = NULL;
+        int arg_count = 0;
+        HashTable *table;
+        HashPosition pos;
+        int i = 0;
+        zval *retval_ptr;
+        zval *zfunction;
+
+        if (arguments) {
+                table = HASH_OF(arguments);
+                args = safe_emalloc(sizeof(zval **), table->nNumOfElements, 0);
+
+                zend_hash_internal_pointer_reset_ex(table, &pos);
+
+                while (zend_hash_get_current_data_ex(table, (void **)&args[i], &pos) == SUCCESS) {
+                        i++;
+                        zend_hash_move_forward_ex(table, &pos);
+                }
+                arg_count = table->nNumOfElements;
+        }
+
+        MAKE_STD_ZVAL(zfunction);
+        ZVAL_STRING(zfunction, function, 1);
+        fci.size = sizeof(fci);
+        fci.function_table = EG(function_table);
+        fci.function_name = zfunction;
+        fci.symbol_table = NULL;
+#if PHP_VERSION_ID >= 50300
+        fci.object_ptr = object;
+#else
+        fci.object_pp = &object;
+#endif
+        fci.retval_ptr_ptr = &retval_ptr;
+        fci.param_count = arg_count;
+        fci.params = args;
+        fci.no_separation = 0;
+
+        if (zend_call_function(&fci, NULL TSRMLS_CC) == FAILURE) {
+                ALLOC_INIT_ZVAL(retval_ptr);
+                ZVAL_BOOL(retval_ptr, 0);
+        }
+
+        if (args) {
+                efree(fci.params);
+        }
+        FREE_DTOR(zfunction);
+        return retval_ptr;
+}
+
+int TWIG_CALL_BOOLEAN(zval *object, char *functionName TSRMLS_DC)
+{
+        zval *ret;
+        int   res;
+
+        ret = TWIG_CALL_USER_FUNC_ARRAY(object, functionName, NULL TSRMLS_CC);
+        res = Z_LVAL_P(ret);
+        zval_ptr_dtor(&ret);
+        return res;
+}
+
+zval *TWIG_GET_STATIC_PROPERTY(zval *class, char *prop_name TSRMLS_DC)
+{
+        zval **tmp_zval;
+        zend_class_entry *ce;
+
+        if (class == NULL || Z_TYPE_P(class) != IS_OBJECT) {
+                return NULL;
+        }
+
+        ce = zend_get_class_entry(class TSRMLS_CC);
+#if PHP_VERSION_ID >= 50400
+        tmp_zval = zend_std_get_static_property(ce, prop_name, strlen(prop_name), 0, NULL TSRMLS_CC);
+#else
+        tmp_zval = zend_std_get_static_property(ce, prop_name, strlen(prop_name), 0 TSRMLS_CC);
+#endif
+        return *tmp_zval;
+}
+
+zval *TWIG_GET_ARRAY_ELEMENT_ZVAL(zval *class, zval *prop_name TSRMLS_DC)
+{
+        zval **tmp_zval;
+        char *tmp_name;
+
+        if (class == NULL || Z_TYPE_P(class) != IS_ARRAY) {
+                if (class != NULL && Z_TYPE_P(class) == IS_OBJECT && TWIG_INSTANCE_OF(class, zend_ce_arrayaccess TSRMLS_CC)) {
+                        // array access object
+                        return TWIG_GET_ARRAYOBJECT_ELEMENT(class, prop_name TSRMLS_CC);
+                }
+                return NULL;
+        }
+
+        switch(Z_TYPE_P(prop_name)) {
+                case IS_NULL:
+                        zend_hash_find(HASH_OF(class), "", 1, (void**) &tmp_zval);
+                        return *tmp_zval;
+
+                case IS_BOOL:
+                case IS_DOUBLE:
+                        convert_to_long(prop_name);
+                case IS_LONG:
+                        zend_hash_index_find(HASH_OF(class), Z_LVAL_P(prop_name), (void **) &tmp_zval);
+                        return *tmp_zval;
+
+                case IS_STRING:
+                        zend_symtable_find(HASH_OF(class), Z_STRVAL_P(prop_name), Z_STRLEN_P(prop_name) + 1, (void**) &tmp_zval);
+                        return *tmp_zval;
+        }
+
+        return NULL;
+}
+
+zval *TWIG_GET_ARRAY_ELEMENT(zval *class, char *prop_name, int prop_name_length TSRMLS_DC)
+{
+        zval **tmp_zval;
+
+        if (class == NULL/* || Z_TYPE_P(class) != IS_ARRAY*/) {
+                return NULL;
+        }
+
+        if (class != NULL && Z_TYPE_P(class) == IS_OBJECT && TWIG_INSTANCE_OF(class, zend_ce_arrayaccess TSRMLS_CC)) {
+                // array access object
+                zval *tmp_name_zval;
+                zval *tmp_ret_zval;
+
+                ALLOC_INIT_ZVAL(tmp_name_zval);
+                ZVAL_STRING(tmp_name_zval, prop_name, 1);
+                tmp_ret_zval = TWIG_GET_ARRAYOBJECT_ELEMENT(class, tmp_name_zval TSRMLS_CC);
+                FREE_DTOR(tmp_name_zval);
+                return tmp_ret_zval;
+        }
+
+        if (zend_symtable_find(HASH_OF(class), prop_name, prop_name_length+1, (void**)&tmp_zval) == SUCCESS) {
+                return *tmp_zval;
+        }
+        return NULL;
+}
+
+zval *TWIG_PROPERTY(zval *object, zval *propname TSRMLS_DC)
+{
+        zval *tmp = NULL;
+
+        if (Z_OBJ_HT_P(object)->read_property) {
+#if PHP_VERSION_ID >= 50400
+                tmp = Z_OBJ_HT_P(object)->read_property(object, propname, BP_VAR_IS, NULL TSRMLS_CC);
+#else
+                tmp = Z_OBJ_HT_P(object)->read_property(object, propname, BP_VAR_IS TSRMLS_CC);
+#endif
+                if (tmp != EG(uninitialized_zval_ptr)) {
+                        return tmp;
+                } else {
+                        return NULL;
+                }
+        }
+        return tmp;
+}
+
+int TWIG_HAS_PROPERTY(zval *object, zval *propname TSRMLS_DC)
+{
+        if (Z_OBJ_HT_P(object)->has_property) {
+#if PHP_VERSION_ID >= 50400
+                return Z_OBJ_HT_P(object)->has_property(object, propname, 0, NULL TSRMLS_CC);
+#else
+                return Z_OBJ_HT_P(object)->has_property(object, propname, 0 TSRMLS_CC);
+#endif
+        }
+        return 0;
+}
+
+int TWIG_HAS_DYNAMIC_PROPERTY(zval *object, char *prop, int prop_len TSRMLS_DC)
+{
+        if (Z_OBJ_HT_P(object)->get_properties) {
+                return zend_hash_quick_exists(
+                                Z_OBJ_HT_P(object)->get_properties(object TSRMLS_CC), // the properties hash
+                                prop,                                                 // property name
+                                prop_len + 1,                                         // property length
+                                zend_get_hash_value(prop, prop_len + 1)               // hash value
+                        );
+        }
+        return 0;
+}
+
+zval *TWIG_PROPERTY_CHAR(zval *object, char *propname TSRMLS_DC)
+{
+        zval *tmp_name_zval, *tmp;
+
+        ALLOC_INIT_ZVAL(tmp_name_zval);
+        ZVAL_STRING(tmp_name_zval, propname, 1);
+        tmp = TWIG_PROPERTY(object, tmp_name_zval TSRMLS_CC);
+        FREE_DTOR(tmp_name_zval);
+        return tmp;
+}
+
+int TWIG_CALL_B_0(zval *object, char *method)
+{
+        return 0;
+}
+
+zval *TWIG_CALL_S(zval *object, char *method, char *arg0 TSRMLS_DC)
+{
+        zend_fcall_info fci;
+        zval **args[1];
+        zval *argument;
+        zval *zfunction;
+        zval *retval_ptr;
+
+        MAKE_STD_ZVAL(argument);
+        ZVAL_STRING(argument, arg0, 1);
+        args[0] = &argument;
+
+        MAKE_STD_ZVAL(zfunction);
+        ZVAL_STRING(zfunction, method, 1);
+        fci.size = sizeof(fci);
+        fci.function_table = EG(function_table);
+        fci.function_name = zfunction;
+        fci.symbol_table = NULL;
+#if PHP_VERSION_ID >= 50300
+        fci.object_ptr = object;
+#else
+        fci.object_pp = &object;
+#endif
+        fci.retval_ptr_ptr = &retval_ptr;
+        fci.param_count = 1;
+        fci.params = args;
+        fci.no_separation = 0;
+
+        if (zend_call_function(&fci, NULL TSRMLS_CC) == FAILURE) {
+                FREE_DTOR(zfunction);
+                zval_ptr_dtor(&argument);
+                return 0;
+        }
+        FREE_DTOR(zfunction);
+        zval_ptr_dtor(&argument);
+        return retval_ptr;
+}
+
+int TWIG_CALL_SB(zval *object, char *method, char *arg0 TSRMLS_DC)
+{
+        zval *retval_ptr;
+        int success;
+
+        retval_ptr = TWIG_CALL_S(object, method, arg0 TSRMLS_CC);
+        success = (retval_ptr && (Z_TYPE_P(retval_ptr) == IS_BOOL) && Z_LVAL_P(retval_ptr));
+
+        if (retval_ptr) {
+                zval_ptr_dtor(&retval_ptr);
+        }
+
+        return success;
+}
+
+int TWIG_CALL_Z(zval *object, char *method, zval *arg1 TSRMLS_DC)
+{
+        zend_fcall_info fci;
+        zval **args[1];
+        zval *zfunction;
+        zval *retval_ptr;
+        int   success;
+
+        args[0] = &arg1;
+
+        MAKE_STD_ZVAL(zfunction);
+        ZVAL_STRING(zfunction, method, 1);
+        fci.size = sizeof(fci);
+        fci.function_table = EG(function_table);
+        fci.function_name = zfunction;
+        fci.symbol_table = NULL;
+#if PHP_VERSION_ID >= 50300
+        fci.object_ptr = object;
+#else
+        fci.object_pp = &object;
+#endif
+        fci.retval_ptr_ptr = &retval_ptr;
+        fci.param_count = 1;
+        fci.params = args;
+        fci.no_separation = 0;
+
+        if (zend_call_function(&fci, NULL TSRMLS_CC) == FAILURE) {
+                FREE_DTOR(zfunction);
+                if (retval_ptr) {
+                        zval_ptr_dtor(&retval_ptr);
+                }
+                return 0;
+        }
+
+        FREE_DTOR(zfunction);
+
+        success = (retval_ptr && (Z_TYPE_P(retval_ptr) == IS_BOOL) && Z_LVAL_P(retval_ptr));
+        if (retval_ptr) {
+                zval_ptr_dtor(&retval_ptr);
+        }
+
+        return success;
+}
+
+int TWIG_CALL_ZZ(zval *object, char *method, zval *arg1, zval *arg2 TSRMLS_DC)
+{
+        zend_fcall_info fci;
+        zval **args[2];
+        zval *zfunction;
+        zval *retval_ptr;
+        int   success;
+
+        args[0] = &arg1;
+        args[1] = &arg2;
+
+        MAKE_STD_ZVAL(zfunction);
+        ZVAL_STRING(zfunction, method, 1);
+        fci.size = sizeof(fci);
+        fci.function_table = EG(function_table);
+        fci.function_name = zfunction;
+        fci.symbol_table = NULL;
+#if PHP_VERSION_ID >= 50300
+        fci.object_ptr = object;
+#else
+        fci.object_pp = &object;
+#endif
+        fci.retval_ptr_ptr = &retval_ptr;
+        fci.param_count = 2;
+        fci.params = args;
+        fci.no_separation = 0;
+
+        if (zend_call_function(&fci, NULL TSRMLS_CC) == FAILURE) {
+                FREE_DTOR(zfunction);
+                return 0;
+        }
+
+        FREE_DTOR(zfunction);
+
+        success = (retval_ptr && (Z_TYPE_P(retval_ptr) == IS_BOOL) && Z_LVAL_P(retval_ptr));
+        if (retval_ptr) {
+                zval_ptr_dtor(&retval_ptr);
+        }
+
+        return success;
+}
+
+#ifndef Z_SET_REFCOUNT_P
+# define Z_SET_REFCOUNT_P(pz, rc)  pz->refcount = rc
+# define Z_UNSET_ISREF_P(pz) pz->is_ref = 0
+#endif
+
+void TWIG_NEW(zval *object, char *class, zval *arg0, zval *arg1 TSRMLS_DC)
+{
+        zend_class_entry **pce;
+
+        if (zend_lookup_class(class, strlen(class), &pce TSRMLS_CC) == FAILURE) {
+                return;
+        }
+
+        Z_TYPE_P(object) = IS_OBJECT;
+        object_init_ex(object, *pce);
+        Z_SET_REFCOUNT_P(object, 1);
+        Z_UNSET_ISREF_P(object);
+
+        TWIG_CALL_ZZ(object, "__construct", arg0, arg1 TSRMLS_CC);
+}
+
+static int twig_add_array_key_to_string(void *pDest APPLY_TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
+{
+        smart_str *buf;
+        char *joiner;
+        APPLY_TSRMLS_FETCH();
+
+        buf = va_arg(args, smart_str*);
+        joiner = va_arg(args, char*);
+
+        if (buf->len != 0) {
+                smart_str_appends(buf, joiner);
+        }
+
+        if (hash_key->nKeyLength == 0) {
+                smart_str_append_long(buf, (long) hash_key->h);
+        } else {
+                char *key, *tmp_str;
+                int key_len, tmp_len;
+                key = php_addcslashes(hash_key->arKey, hash_key->nKeyLength - 1, &key_len, 0, "'\\", 2 TSRMLS_CC);
+                tmp_str = php_str_to_str_ex(key, key_len, "\0", 1, "' . \"\\0\" . '", 12, &tmp_len, 0, NULL);
+
+                smart_str_appendl(buf, tmp_str, tmp_len);
+                efree(key);
+                efree(tmp_str);
+        }
+
+        return 0;
+}
+
+char *TWIG_IMPLODE_ARRAY_KEYS(char *joiner, zval *array TSRMLS_DC)
+{
+        smart_str collector = { 0, 0, 0 };
+
+        smart_str_appendl(&collector, "", 0);
+        zend_hash_apply_with_arguments(HASH_OF(array) APPLY_TSRMLS_CC, twig_add_array_key_to_string, 2, &collector, joiner);
+        smart_str_0(&collector);
+
+        return collector.c;
+}
+
+static void TWIG_THROW_EXCEPTION(char *exception_name TSRMLS_DC, char *message, ...)
+{
+        char *buffer;
+        va_list args;
+        zend_class_entry **pce;
+
+        if (zend_lookup_class(exception_name, strlen(exception_name), &pce TSRMLS_CC) == FAILURE) {
+                return;
+        }
+
+        va_start(args, message);
+        vspprintf(&buffer, 0, message, args);
+        va_end(args);
+
+        zend_throw_exception_ex(*pce, 0 TSRMLS_CC, buffer);
+        efree(buffer);
+}
+
+static void TWIG_RUNTIME_ERROR(zval *template TSRMLS_DC, char *message, ...)
+{
+        char *buffer;
+        va_list args;
+        zend_class_entry **pce;
+        zval *ex;
+        zval *constructor;
+        zval *zmessage;
+        zval *lineno;
+        zval *filename_func;
+        zval *filename;
+        zval *constructor_args[3];
+        zval *constructor_retval;
+
+        if (zend_lookup_class("Twig_Error_Runtime", strlen("Twig_Error_Runtime"), &pce TSRMLS_CC) == FAILURE) {
+                return;
+        }
+
+        va_start(args, message);
+        vspprintf(&buffer, 0, message, args);
+        va_end(args);
+
+        MAKE_STD_ZVAL(ex);
+        object_init_ex(ex, *pce);
+
+        // Call Twig_Error constructor
+        MAKE_STD_ZVAL(constructor);
+        MAKE_STD_ZVAL(zmessage);
+        MAKE_STD_ZVAL(lineno);
+        MAKE_STD_ZVAL(filename);
+        MAKE_STD_ZVAL(filename_func);
+        MAKE_STD_ZVAL(constructor_retval);
+
+        ZVAL_STRINGL(constructor, "__construct", sizeof("__construct")-1, 1);
+        ZVAL_STRING(zmessage, buffer, 1);
+        ZVAL_LONG(lineno, -1);
+
+        // Get template filename
+        ZVAL_STRINGL(filename_func, "getTemplateName", sizeof("getTemplateName")-1, 1);
+        call_user_function(EG(function_table), &template, filename_func, filename, 0, 0 TSRMLS_CC);
+
+        constructor_args[0] = zmessage;
+        constructor_args[1] = lineno;
+        constructor_args[2] = filename;
+        call_user_function(EG(function_table), &ex, constructor, constructor_retval, 3, constructor_args TSRMLS_CC);
+
+        zval_ptr_dtor(&constructor_retval);
+        zval_ptr_dtor(&zmessage);
+        zval_ptr_dtor(&lineno);
+        zval_ptr_dtor(&filename);
+        FREE_DTOR(constructor);
+        FREE_DTOR(filename_func);
+        efree(buffer);
+
+        zend_throw_exception_object(ex TSRMLS_CC);
+}
+
+static char *TWIG_GET_CLASS_NAME(zval *object TSRMLS_DC)
+{
+        char *class_name;
+        zend_uint class_name_len;
+
+        if (Z_TYPE_P(object) != IS_OBJECT) {
+                return "";
+        }
+#if PHP_API_VERSION >= 20100412
+        zend_get_object_classname(object, (const char **) &class_name, &class_name_len TSRMLS_CC);
+#else
+        zend_get_object_classname(object, &class_name, &class_name_len TSRMLS_CC);
+#endif
+        return class_name;
+}
+
+static int twig_add_method_to_class(void *pDest APPLY_TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
+{
+        zval *retval;
+        char *item;
+        size_t item_len;
+        zend_function *mptr = (zend_function *) pDest;
+        APPLY_TSRMLS_FETCH();
+
+        if (!(mptr->common.fn_flags & ZEND_ACC_PUBLIC)) {
+                return 0;
+        }
+
+        retval = va_arg(args, zval*);
+
+        item_len = strlen(mptr->common.function_name);
+        item = estrndup(mptr->common.function_name, item_len);
+        php_strtolower(item, item_len);
+
+        add_assoc_stringl_ex(retval, item, item_len+1, item, item_len, 0);
+
+        return 0;
+}
+
+static int twig_add_property_to_class(void *pDest APPLY_TSRMLS_DC, int num_args, va_list args, zend_hash_key *hash_key)
+{
+        zend_class_entry *ce;
+        zval *retval;
+        char *class_name, *prop_name;
+        zend_property_info *pptr = (zend_property_info *) pDest;
+        APPLY_TSRMLS_FETCH();
+
+        if (!(pptr->flags & ZEND_ACC_PUBLIC)) {
+                return 0;
+        }
+
+        ce = *va_arg(args, zend_class_entry**);
+        retval = va_arg(args, zval*);
+
+#if PHP_API_VERSION >= 20100412
+        zend_unmangle_property_name(pptr->name, pptr->name_length, (const char **) &class_name, (const char **) &prop_name);
+#else
+        zend_unmangle_property_name(pptr->name, pptr->name_length, &class_name, &prop_name);
+#endif
+
+        add_assoc_string(retval, prop_name, prop_name, 1);
+
+        return 0;
+}
+
+static void twig_add_class_to_cache(zval *cache, zval *object, char *class_name TSRMLS_DC)
+{
+        zval *class_info, *class_methods, *class_properties;
+        zend_class_entry *class_ce;
+
+        class_ce = zend_get_class_entry(object TSRMLS_CC);
+
+        ALLOC_INIT_ZVAL(class_info);
+        ALLOC_INIT_ZVAL(class_methods);
+        ALLOC_INIT_ZVAL(class_properties);
+        array_init(class_info);
+        array_init(class_methods);
+        array_init(class_properties);
+        // add all methods to self::cache[$class]['methods']
+        zend_hash_apply_with_arguments(&class_ce->function_table APPLY_TSRMLS_CC, twig_add_method_to_class, 1, class_methods);
+        zend_hash_apply_with_arguments(&class_ce->properties_info APPLY_TSRMLS_CC, twig_add_property_to_class, 2, &class_ce, class_properties);
+
+        add_assoc_zval(class_info, "methods", class_methods);
+        add_assoc_zval(class_info, "properties", class_properties);
+        add_assoc_zval(cache, class_name, class_info);
+}
+
+/* {{{ proto mixed twig_template_get_attributes(TwigTemplate template, mixed object, mixed item, array arguments, string type, boolean isDefinedTest, boolean ignoreStrictCheck)
+   A C implementation of TwigTemplate::getAttribute() */
+PHP_FUNCTION(twig_template_get_attributes)
+{
+        zval *template;
+        zval *object;
+        char *item;
+        int  item_len;
+        zval *zitem, ztmpitem;
+        zval *arguments = NULL;
+        zval *ret = NULL;
+        char *type = NULL;
+        int   type_len = 0;
+        zend_bool isDefinedTest = 0;
+        zend_bool ignoreStrictCheck = 0;
+        int free_ret = 0;
+        zval *tmp_self_cache;
+
+
+        if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ozz|asbb", &template, &object, &zitem, &arguments, &type, &type_len, &isDefinedTest, &ignoreStrictCheck) == FAILURE) {
+                return;
+        }
+
+        // convert the item to a string
+        ztmpitem = *zitem;
+        zval_copy_ctor(&ztmpitem);
+        convert_to_string(&ztmpitem);
+        item_len = Z_STRLEN(ztmpitem);
+        item = estrndup(Z_STRVAL(ztmpitem), item_len);
+        zval_dtor(&ztmpitem);
+
+        if (!type) {
+                type = "any";
+        }
+
+/*
+        // array
+        if (Twig_TemplateInterface::METHOD_CALL !== $type) {
+                $arrayItem = is_bool($item) || is_float($item) ? (int) $item : $item;
+
+                if ((is_array($object) && array_key_exists($arrayItem, $object))
+                        || ($object instanceof ArrayAccess && isset($object[$arrayItem]))
+                ) {
+                        if ($isDefinedTest) {
+                                return true;
+                        }
+
+                        return $object[$arrayItem];
+                }
+*/
+
+
+        if (strcmp("method", type) != 0) {
+                if ((TWIG_ARRAY_KEY_EXISTS(object, zitem))
+                        || (TWIG_INSTANCE_OF(object, zend_ce_arrayaccess TSRMLS_CC) && TWIG_ISSET_ARRAYOBJECT_ELEMENT(object, zitem TSRMLS_CC))
+                ) {
+
+                        if (isDefinedTest) {
+                                RETURN_TRUE;
+                        }
+
+                        ret = TWIG_GET_ARRAY_ELEMENT_ZVAL(object, zitem TSRMLS_CC);
+
+                        if (!ret) {
+                                ret = &EG(uninitialized_zval);
+                        }
+                        RETVAL_ZVAL(ret, 1, 0);
+                        if (free_ret) {
+                                zval_ptr_dtor(&ret);
+                        }
+                        return;
+                }
+/*
+                if (Twig_TemplateInterface::ARRAY_CALL === $type) {
+                        if ($isDefinedTest) {
+                                return false;
+                        }
+                        if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                                return null;
+                        }
+*/
+                if (strcmp("array", type) == 0 || Z_TYPE_P(object) != IS_OBJECT) {
+                        if (isDefinedTest) {
+                                RETURN_FALSE;
+                        }
+                        if (ignoreStrictCheck || !TWIG_CALL_BOOLEAN(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "isStrictVariables" TSRMLS_CC)) {
+                                return;
+                        }
+/*
+                        if (is_object($object)) {
+                                throw new Twig_Error_Runtime(sprintf('Key "%s" in object (with ArrayAccess) of type "%s" does not exist', $arrayItem, get_class($object)), -1, $this->getTemplateName());
+                        } elseif (is_array($object)) {
+                                throw new Twig_Error_Runtime(sprintf('Key "%s" for array with keys "%s" does not exist', $arrayItem, implode(', ', array_keys($object))), -1, $this->getTemplateName());
+                        } elseif (Twig_TemplateInterface::ARRAY_CALL === $type) {
+                                throw new Twig_Error_Runtime(sprintf('Impossible to access a key ("%s") on a %s variable ("%s")', $item, gettype($object), $object), -1, $this->getTemplateName());
+                        } else {
+                                throw new Twig_Error_Runtime(sprintf('Impossible to access an attribute ("%s") on a %s variable ("%s")', $item, gettype($object), $object), -1, $this->getTemplateName());
+                        }
+                }
+        }
+*/
+                        if (Z_TYPE_P(object) == IS_OBJECT) {
+                                TWIG_RUNTIME_ERROR(template TSRMLS_CC, "Key \"%s\" in object (with ArrayAccess) of type \"%s\" does not exist", item, TWIG_GET_CLASS_NAME(object TSRMLS_CC));
+                        } else if (Z_TYPE_P(object) == IS_ARRAY) {
+                                TWIG_RUNTIME_ERROR(template TSRMLS_CC, "Key \"%s\" for array with keys \"%s\" does not exist", item, TWIG_IMPLODE_ARRAY_KEYS(", ", object TSRMLS_CC));
+                        } else {
+                                char *type_name = zend_zval_type_name(object);
+                                Z_ADDREF_P(object);
+                                convert_to_string(object);
+                                TWIG_RUNTIME_ERROR(template TSRMLS_CC,
+                                        (strcmp("array", type) == 0)
+                                                ? "Impossible to access a key (\"%s\") on a %s variable (\"%s\")"
+                                                : "Impossible to access an attribute (\"%s\") on a %s variable (\"%s\")",
+                                        item, type_name, Z_STRVAL_P(object));
+                                zval_ptr_dtor(&object);
+                        }
+                        return;
+                }
+        }
+
+/*
+        if (!is_object($object)) {
+                if ($isDefinedTest) {
+                        return false;
+                }
+*/
+
+        if (Z_TYPE_P(object) != IS_OBJECT) {
+                if (isDefinedTest) {
+                        RETURN_FALSE;
+                }
+/*
+                if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                        return null;
+                }
+                throw new Twig_Error_Runtime(sprintf('Impossible to invoke a method ("%s") on a %s variable ("%s")', $item, gettype($object), $object), -1, $this->getTemplateName());
+        }
+*/
+                if (ignoreStrictCheck || !TWIG_CALL_BOOLEAN(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "isStrictVariables" TSRMLS_CC)) {
+                        return;
+                }
+
+                char *type_name = zend_zval_type_name(object);
+                Z_ADDREF_P(object);
+                convert_to_string_ex(&object);
+
+                TWIG_RUNTIME_ERROR(template TSRMLS_CC, "Impossible to invoke a method (\"%s\") on a %s variable (\"%s\")", item, type_name, Z_STRVAL_P(object));
+
+                zval_ptr_dtor(&object);
+
+                return;
+        }
+/*
+        $class = get_class($object);
+*/
+        char *class_name = NULL;
+        zval *tmp_class;
+
+        class_name = TWIG_GET_CLASS_NAME(object TSRMLS_CC);
+        tmp_self_cache = TWIG_GET_STATIC_PROPERTY(template, "cache" TSRMLS_CC);
+        tmp_class = TWIG_GET_ARRAY_ELEMENT(tmp_self_cache, class_name, strlen(class_name) TSRMLS_CC);
+
+        if (!tmp_class) {
+                twig_add_class_to_cache(tmp_self_cache, object, class_name TSRMLS_CC);
+                tmp_class = TWIG_GET_ARRAY_ELEMENT(tmp_self_cache, class_name, strlen(class_name) TSRMLS_CC);
+        }
+        efree(class_name);
+
+/*
+        // object property
+        if (Twig_TemplateInterface::METHOD_CALL !== $type) {
+                if (isset($object->$item) || array_key_exists((string) $item, $object)) {
+                        if ($isDefinedTest) {
+                                return true;
+                        }
+
+                        if ($this->env->hasExtension('sandbox')) {
+                                $this->env->getExtension('sandbox')->checkPropertyAllowed($object, $item);
+                        }
+
+                        return $object->$item;
+                }
+        }
+*/
+        if (strcmp("method", type) != 0) {
+                zval *tmp_properties, *tmp_item;
+
+                tmp_properties = TWIG_GET_ARRAY_ELEMENT(tmp_class, "properties", strlen("properties") TSRMLS_CC);
+                tmp_item = TWIG_GET_ARRAY_ELEMENT(tmp_properties, item, item_len TSRMLS_CC);
+
+                if (tmp_item || TWIG_HAS_PROPERTY(object, zitem TSRMLS_CC) || TWIG_HAS_DYNAMIC_PROPERTY(object, item, item_len TSRMLS_CC)) {
+                        if (isDefinedTest) {
+                                RETURN_TRUE;
+                        }
+                        if (TWIG_CALL_SB(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "hasExtension", "sandbox" TSRMLS_CC)) {
+                                TWIG_CALL_ZZ(TWIG_CALL_S(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "getExtension", "sandbox" TSRMLS_CC), "checkPropertyAllowed", object, zitem TSRMLS_CC);
+                        }
+                        if (EG(exception)) {
+                                return;
+                        }
+
+                        ret = TWIG_PROPERTY(object, zitem TSRMLS_CC);
+                        RETURN_ZVAL(ret, 1, 0);
+                }
+        }
+/*
+        // object method
+        if (!isset(self::$cache[$class]['methods'])) {
+                self::$cache[$class]['methods'] = array_change_key_case(array_flip(get_class_methods($object)));
+        }
+
+        $lcItem = strtolower($item);
+        if (isset(self::$cache[$class]['methods'][$lcItem])) {
+                $method = (string) $item;
+        } elseif (isset(self::$cache[$class]['methods']['get'.$lcItem])) {
+                $method = 'get'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['is'.$lcItem])) {
+                $method = 'is'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['__call'])) {
+                $method = (string) $item;
+*/
+        {
+                char *lcItem = TWIG_STRTOLOWER(item, item_len);
+                int   lcItem_length;
+                char *method = NULL;
+                char *tmp_method_name_get;
+                char *tmp_method_name_is;
+                zval *tmp_methods;
+
+                lcItem_length = strlen(lcItem);
+                tmp_method_name_get = emalloc(4 + lcItem_length);
+                tmp_method_name_is  = emalloc(3 + lcItem_length);
+
+                sprintf(tmp_method_name_get, "get%s", lcItem);
+                sprintf(tmp_method_name_is, "is%s", lcItem);
+
+                tmp_methods = TWIG_GET_ARRAY_ELEMENT(tmp_class, "methods", strlen("methods") TSRMLS_CC);
+
+                if (TWIG_GET_ARRAY_ELEMENT(tmp_methods, lcItem, lcItem_length TSRMLS_CC)) {
+                        method = item;
+                } else if (TWIG_GET_ARRAY_ELEMENT(tmp_methods, tmp_method_name_get, lcItem_length + 3 TSRMLS_CC)) {
+                        method = tmp_method_name_get;
+                } else if (TWIG_GET_ARRAY_ELEMENT(tmp_methods, tmp_method_name_is, lcItem_length + 2 TSRMLS_CC)) {
+                        method = tmp_method_name_is;
+                } else if (TWIG_GET_ARRAY_ELEMENT(tmp_methods, "__call", 6 TSRMLS_CC)) {
+                        method = item;
+/*
+        } else {
+                if ($isDefinedTest) {
+                        return false;
+                }
+
+                if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                        return null;
+                }
+
+                throw new Twig_Error_Runtime(sprintf('Method "%s" for object "%s" does not exist', $item, get_class($object)), -1, $this->getTemplateName());
+        }
+
+        if ($isDefinedTest) {
+                return true;
+        }
+*/
+                } else {
+                        efree(tmp_method_name_get);
+                        efree(tmp_method_name_is);
+                        efree(lcItem);
+
+                        if (isDefinedTest) {
+                                RETURN_FALSE;
+                        }
+                        if (ignoreStrictCheck || !TWIG_CALL_BOOLEAN(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "isStrictVariables" TSRMLS_CC)) {
+                                return;
+                        }
+                        TWIG_RUNTIME_ERROR(template TSRMLS_CC, "Method \"%s\" for object \"%s\" does not exist", item, TWIG_GET_CLASS_NAME(object TSRMLS_CC));
+                        return;
+                }
+
+                if (isDefinedTest) {
+                        efree(tmp_method_name_get);
+                        efree(tmp_method_name_is);
+                        efree(lcItem);
+                        RETURN_TRUE;
+                }
+/*
+        if ($this->env->hasExtension('sandbox')) {
+                $this->env->getExtension('sandbox')->checkMethodAllowed($object, $method);
+        }
+*/
+                if (TWIG_CALL_SB(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "hasExtension", "sandbox" TSRMLS_CC)) {
+                        TWIG_CALL_ZZ(TWIG_CALL_S(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "getExtension", "sandbox" TSRMLS_CC), "checkMethodAllowed", object, zitem TSRMLS_CC);
+                }
+                if (EG(exception)) {
+                        efree(tmp_method_name_get);
+                        efree(tmp_method_name_is);
+                        efree(lcItem);
+                        return;
+                }
+/*
+        $ret = call_user_func_array(array($object, $method), $arguments);
+*/
+                ret = TWIG_CALL_USER_FUNC_ARRAY(object, method, arguments TSRMLS_CC);
+                free_ret = 1;
+                efree(tmp_method_name_get);
+                efree(tmp_method_name_is);
+                efree(lcItem);
+        }
+/*
+        // useful when calling a template method from a template
+        // this is not supported but unfortunately heavily used in the Symfony profiler
+        if ($object instanceof Twig_TemplateInterface) {
+                return $ret === '' ? '' : new Twig_Markup($ret, $this->env->getCharset());
+        }
+
+        return $ret;
+*/
+        // ret can be null, if e.g. the called method throws an exception
+        if (ret) {
+                if (TWIG_INSTANCE_OF_USERLAND(object, "Twig_TemplateInterface" TSRMLS_CC)) {
+                        if (Z_STRLEN_P(ret) != 0) {
+                                zval *charset = TWIG_CALL_USER_FUNC_ARRAY(TWIG_PROPERTY_CHAR(template, "env" TSRMLS_CC), "getCharset", NULL TSRMLS_CC);
+                                TWIG_NEW(return_value, "Twig_Markup", ret, charset TSRMLS_CC);
+                                zval_ptr_dtor(&charset);
+                                if (ret) {
+                                        zval_ptr_dtor(&ret);
+                                }
+                                return;
+                        }
+                }
+
+                RETVAL_ZVAL(ret, 1, 0);
+                if (free_ret) {
+                        zval_ptr_dtor(&ret);
+                }
+        }
+}
diff --git a/vendor/twig/twig/lib/Twig/Autoloader.php b/vendor/twig/twig/lib/Twig/Autoloader.php
new file mode 100644
index 00000000..7007d315
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Autoloader.php
@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Autoloads Twig classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Autoloader
+{
+    /**
+     * Registers Twig_Autoloader as an SPL autoloader.
+     *
+     * @param Boolean $prepend Whether to prepend the autoloader or not.
+     */
+    public static function register($prepend = false)
+    {
+        if (version_compare(phpversion(), '5.3.0', '>=')) {
+            spl_autoload_register(array(new self, 'autoload'), true, $prepend);
+        } else {
+            spl_autoload_register(array(new self, 'autoload'));
+        }
+    }
+
+    /**
+     * Handles autoloading of classes.
+     *
+     * @param string $class A class name.
+     */
+    public static function autoload($class)
+    {
+        if (0 !== strpos($class, 'Twig')) {
+            return;
+        }
+
+        if (is_file($file = dirname(__FILE__).'/../'.str_replace(array('_', "\0"), array('/', ''), $class).'.php')) {
+            require $file;
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Compiler.php b/vendor/twig/twig/lib/Twig/Compiler.php
new file mode 100644
index 00000000..99aecbcc
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Compiler.php
@@ -0,0 +1,267 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Compiles a node to PHP code.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Compiler implements Twig_CompilerInterface
+{
+    protected $lastLine;
+    protected $source;
+    protected $indentation;
+    protected $env;
+    protected $debugInfo;
+    protected $sourceOffset;
+    protected $sourceLine;
+    protected $filename;
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment $env The twig environment instance
+     */
+    public function __construct(Twig_Environment $env)
+    {
+        $this->env = $env;
+        $this->debugInfo = array();
+    }
+
+    public function getFilename()
+    {
+        return $this->filename;
+    }
+
+    /**
+     * Returns the environment instance related to this compiler.
+     *
+     * @return Twig_Environment The environment instance
+     */
+    public function getEnvironment()
+    {
+        return $this->env;
+    }
+
+    /**
+     * Gets the current PHP code after compilation.
+     *
+     * @return string The PHP code
+     */
+    public function getSource()
+    {
+        return $this->source;
+    }
+
+    /**
+     * Compiles a node.
+     *
+     * @param Twig_NodeInterface $node        The node to compile
+     * @param integer            $indentation The current indentation
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function compile(Twig_NodeInterface $node, $indentation = 0)
+    {
+        $this->lastLine = null;
+        $this->source = '';
+        $this->sourceOffset = 0;
+        // source code starts at 1 (as we then increment it when we encounter new lines)
+        $this->sourceLine = 1;
+        $this->indentation = $indentation;
+
+        if ($node instanceof Twig_Node_Module) {
+            $this->filename = $node->getAttribute('filename');
+        }
+
+        $node->compile($this);
+
+        return $this;
+    }
+
+    public function subcompile(Twig_NodeInterface $node, $raw = true)
+    {
+        if (false === $raw) {
+            $this->addIndentation();
+        }
+
+        $node->compile($this);
+
+        return $this;
+    }
+
+    /**
+     * Adds a raw string to the compiled code.
+     *
+     * @param string $string The string
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function raw($string)
+    {
+        $this->source .= $string;
+
+        return $this;
+    }
+
+    /**
+     * Writes a string to the compiled code by adding indentation.
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function write()
+    {
+        $strings = func_get_args();
+        foreach ($strings as $string) {
+            $this->addIndentation();
+            $this->source .= $string;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Appends an indentation to the current PHP code after compilation.
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function addIndentation()
+    {
+        $this->source .= str_repeat(' ', $this->indentation * 4);
+
+        return $this;
+    }
+
+    /**
+     * Adds a quoted string to the compiled code.
+     *
+     * @param string $value The string
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function string($value)
+    {
+        $this->source .= sprintf('"%s"', addcslashes($value, "\0\t\"\$\\"));
+
+        return $this;
+    }
+
+    /**
+     * Returns a PHP representation of a given value.
+     *
+     * @param mixed $value The value to convert
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function repr($value)
+    {
+        if (is_int($value) || is_float($value)) {
+            if (false !== $locale = setlocale(LC_NUMERIC, 0)) {
+                setlocale(LC_NUMERIC, 'C');
+            }
+
+            $this->raw($value);
+
+            if (false !== $locale) {
+                setlocale(LC_NUMERIC, $locale);
+            }
+        } elseif (null === $value) {
+            $this->raw('null');
+        } elseif (is_bool($value)) {
+            $this->raw($value ? 'true' : 'false');
+        } elseif (is_array($value)) {
+            $this->raw('array(');
+            $i = 0;
+            foreach ($value as $key => $value) {
+                if ($i++) {
+                    $this->raw(', ');
+                }
+                $this->repr($key);
+                $this->raw(' => ');
+                $this->repr($value);
+            }
+            $this->raw(')');
+        } else {
+            $this->string($value);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Adds debugging information.
+     *
+     * @param Twig_NodeInterface $node The related twig node
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function addDebugInfo(Twig_NodeInterface $node)
+    {
+        if ($node->getLine() != $this->lastLine) {
+            $this->write("// line {$node->getLine()}\n");
+
+            // when mbstring.func_overload is set to 2
+            // mb_substr_count() replaces substr_count()
+            // but they have different signatures!
+            if (((int) ini_get('mbstring.func_overload')) & 2) {
+                // this is much slower than the "right" version
+                $this->sourceLine += mb_substr_count(mb_substr($this->source, $this->sourceOffset), "\n");
+            } else {
+                $this->sourceLine += substr_count($this->source, "\n", $this->sourceOffset);
+            }
+            $this->sourceOffset = strlen($this->source);
+            $this->debugInfo[$this->sourceLine] = $node->getLine();
+
+            $this->lastLine = $node->getLine();
+        }
+
+        return $this;
+    }
+
+    public function getDebugInfo()
+    {
+        return $this->debugInfo;
+    }
+
+    /**
+     * Indents the generated code.
+     *
+     * @param integer $step The number of indentation to add
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function indent($step = 1)
+    {
+        $this->indentation += $step;
+
+        return $this;
+    }
+
+    /**
+     * Outdents the generated code.
+     *
+     * @param integer $step The number of indentation to remove
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function outdent($step = 1)
+    {
+        // can't outdent by more steps than the current indentation level
+        if ($this->indentation < $step) {
+            throw new LogicException('Unable to call outdent() as the indentation would become negative');
+        }
+
+        $this->indentation -= $step;
+
+        return $this;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/CompilerInterface.php b/vendor/twig/twig/lib/Twig/CompilerInterface.php
new file mode 100644
index 00000000..e293ec91
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/CompilerInterface.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by compiler classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_CompilerInterface
+{
+    /**
+     * Compiles a node.
+     *
+     * @param Twig_NodeInterface $node The node to compile
+     *
+     * @return Twig_CompilerInterface The current compiler instance
+     */
+    public function compile(Twig_NodeInterface $node);
+
+    /**
+     * Gets the current PHP code after compilation.
+     *
+     * @return string The PHP code
+     */
+    public function getSource();
+}
diff --git a/vendor/twig/twig/lib/Twig/Environment.php b/vendor/twig/twig/lib/Twig/Environment.php
new file mode 100644
index 00000000..6d4c5c57
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Environment.php
@@ -0,0 +1,1224 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Stores the Twig configuration.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Environment
+{
+    const VERSION = '1.13.2';
+
+    protected $charset;
+    protected $loader;
+    protected $debug;
+    protected $autoReload;
+    protected $cache;
+    protected $lexer;
+    protected $parser;
+    protected $compiler;
+    protected $baseTemplateClass;
+    protected $extensions;
+    protected $parsers;
+    protected $visitors;
+    protected $filters;
+    protected $tests;
+    protected $functions;
+    protected $globals;
+    protected $runtimeInitialized;
+    protected $extensionInitialized;
+    protected $loadedTemplates;
+    protected $strictVariables;
+    protected $unaryOperators;
+    protected $binaryOperators;
+    protected $templateClassPrefix = '__TwigTemplate_';
+    protected $functionCallbacks;
+    protected $filterCallbacks;
+    protected $staging;
+
+    /**
+     * Constructor.
+     *
+     * Available options:
+     *
+     *  * debug: When set to true, it automatically set "auto_reload" to true as
+     *           well (default to false).
+     *
+     *  * charset: The charset used by the templates (default to UTF-8).
+     *
+     *  * base_template_class: The base template class to use for generated
+     *                         templates (default to Twig_Template).
+     *
+     *  * cache: An absolute path where to store the compiled templates, or
+     *           false to disable compilation cache (default).
+     *
+     *  * auto_reload: Whether to reload the template is the original source changed.
+     *                 If you don't provide the auto_reload option, it will be
+     *                 determined automatically base on the debug value.
+     *
+     *  * strict_variables: Whether to ignore invalid variables in templates
+     *                      (default to false).
+     *
+     *  * autoescape: Whether to enable auto-escaping (default to html):
+     *                  * false: disable auto-escaping
+     *                  * true: equivalent to html
+     *                  * html, js: set the autoescaping to one of the supported strategies
+     *                  * PHP callback: a PHP callback that returns an escaping strategy based on the template "filename"
+     *
+     *  * optimizations: A flag that indicates which optimizations to apply
+     *                   (default to -1 which means that all optimizations are enabled;
+     *                   set it to 0 to disable).
+     *
+     * @param Twig_LoaderInterface $loader  A Twig_LoaderInterface instance
+     * @param array                $options An array of options
+     */
+    public function __construct(Twig_LoaderInterface $loader = null, $options = array())
+    {
+        if (null !== $loader) {
+            $this->setLoader($loader);
+        }
+
+        $options = array_merge(array(
+            'debug'               => false,
+            'charset'             => 'UTF-8',
+            'base_template_class' => 'Twig_Template',
+            'strict_variables'    => false,
+            'autoescape'          => 'html',
+            'cache'               => false,
+            'auto_reload'         => null,
+            'optimizations'       => -1,
+        ), $options);
+
+        $this->debug              = (bool) $options['debug'];
+        $this->charset            = strtoupper($options['charset']);
+        $this->baseTemplateClass  = $options['base_template_class'];
+        $this->autoReload         = null === $options['auto_reload'] ? $this->debug : (bool) $options['auto_reload'];
+        $this->strictVariables    = (bool) $options['strict_variables'];
+        $this->runtimeInitialized = false;
+        $this->setCache($options['cache']);
+        $this->functionCallbacks = array();
+        $this->filterCallbacks = array();
+
+        $this->addExtension(new Twig_Extension_Core());
+        $this->addExtension(new Twig_Extension_Escaper($options['autoescape']));
+        $this->addExtension(new Twig_Extension_Optimizer($options['optimizations']));
+        $this->extensionInitialized = false;
+        $this->staging = new Twig_Extension_Staging();
+    }
+
+    /**
+     * Gets the base template class for compiled templates.
+     *
+     * @return string The base template class name
+     */
+    public function getBaseTemplateClass()
+    {
+        return $this->baseTemplateClass;
+    }
+
+    /**
+     * Sets the base template class for compiled templates.
+     *
+     * @param string $class The base template class name
+     */
+    public function setBaseTemplateClass($class)
+    {
+        $this->baseTemplateClass = $class;
+    }
+
+    /**
+     * Enables debugging mode.
+     */
+    public function enableDebug()
+    {
+        $this->debug = true;
+    }
+
+    /**
+     * Disables debugging mode.
+     */
+    public function disableDebug()
+    {
+        $this->debug = false;
+    }
+
+    /**
+     * Checks if debug mode is enabled.
+     *
+     * @return Boolean true if debug mode is enabled, false otherwise
+     */
+    public function isDebug()
+    {
+        return $this->debug;
+    }
+
+    /**
+     * Enables the auto_reload option.
+     */
+    public function enableAutoReload()
+    {
+        $this->autoReload = true;
+    }
+
+    /**
+     * Disables the auto_reload option.
+     */
+    public function disableAutoReload()
+    {
+        $this->autoReload = false;
+    }
+
+    /**
+     * Checks if the auto_reload option is enabled.
+     *
+     * @return Boolean true if auto_reload is enabled, false otherwise
+     */
+    public function isAutoReload()
+    {
+        return $this->autoReload;
+    }
+
+    /**
+     * Enables the strict_variables option.
+     */
+    public function enableStrictVariables()
+    {
+        $this->strictVariables = true;
+    }
+
+    /**
+     * Disables the strict_variables option.
+     */
+    public function disableStrictVariables()
+    {
+        $this->strictVariables = false;
+    }
+
+    /**
+     * Checks if the strict_variables option is enabled.
+     *
+     * @return Boolean true if strict_variables is enabled, false otherwise
+     */
+    public function isStrictVariables()
+    {
+        return $this->strictVariables;
+    }
+
+    /**
+     * Gets the cache directory or false if cache is disabled.
+     *
+     * @return string|false
+     */
+    public function getCache()
+    {
+        return $this->cache;
+    }
+
+     /**
+      * Sets the cache directory or false if cache is disabled.
+      *
+      * @param string|false $cache The absolute path to the compiled templates,
+      *                            or false to disable cache
+      */
+    public function setCache($cache)
+    {
+        $this->cache = $cache ? $cache : false;
+    }
+
+    /**
+     * Gets the cache filename for a given template.
+     *
+     * @param string $name The template name
+     *
+     * @return string The cache file name
+     */
+    public function getCacheFilename($name)
+    {
+        if (false === $this->cache) {
+            return false;
+        }
+
+        $class = substr($this->getTemplateClass($name), strlen($this->templateClassPrefix));
+
+        return $this->getCache().'/'.substr($class, 0, 2).'/'.substr($class, 2, 2).'/'.substr($class, 4).'.php';
+    }
+
+    /**
+     * Gets the template class associated with the given string.
+     *
+     * @param string  $name  The name for which to calculate the template class name
+     * @param integer $index The index if it is an embedded template
+     *
+     * @return string The template class name
+     */
+    public function getTemplateClass($name, $index = null)
+    {
+        return $this->templateClassPrefix.md5($this->getLoader()->getCacheKey($name)).(null === $index ? '' : '_'.$index);
+    }
+
+    /**
+     * Gets the template class prefix.
+     *
+     * @return string The template class prefix
+     */
+    public function getTemplateClassPrefix()
+    {
+        return $this->templateClassPrefix;
+    }
+
+    /**
+     * Renders a template.
+     *
+     * @param string $name    The template name
+     * @param array  $context An array of parameters to pass to the template
+     *
+     * @return string The rendered template
+     */
+    public function render($name, array $context = array())
+    {
+        return $this->loadTemplate($name)->render($context);
+    }
+
+    /**
+     * Displays a template.
+     *
+     * @param string $name    The template name
+     * @param array  $context An array of parameters to pass to the template
+     */
+    public function display($name, array $context = array())
+    {
+        $this->loadTemplate($name)->display($context);
+    }
+
+    /**
+     * Loads a template by name.
+     *
+     * @param string  $name  The template name
+     * @param integer $index The index if it is an embedded template
+     *
+     * @return Twig_TemplateInterface A template instance representing the given template name
+     */
+    public function loadTemplate($name, $index = null)
+    {
+        $cls = $this->getTemplateClass($name, $index);
+
+        if (isset($this->loadedTemplates[$cls])) {
+            return $this->loadedTemplates[$cls];
+        }
+
+        if (!class_exists($cls, false)) {
+            if (false === $cache = $this->getCacheFilename($name)) {
+                eval('?>'.$this->compileSource($this->getLoader()->getSource($name), $name));
+            } else {
+                if (!is_file($cache) || ($this->isAutoReload() && !$this->isTemplateFresh($name, filemtime($cache)))) {
+                    $this->writeCacheFile($cache, $this->compileSource($this->getLoader()->getSource($name), $name));
+                }
+
+                require_once $cache;
+            }
+        }
+
+        if (!$this->runtimeInitialized) {
+            $this->initRuntime();
+        }
+
+        return $this->loadedTemplates[$cls] = new $cls($this);
+    }
+
+    /**
+     * Returns true if the template is still fresh.
+     *
+     * Besides checking the loader for freshness information,
+     * this method also checks if the enabled extensions have
+     * not changed.
+     *
+     * @param string    $name The template name
+     * @param timestamp $time The last modification time of the cached template
+     *
+     * @return Boolean true if the template is fresh, false otherwise
+     */
+    public function isTemplateFresh($name, $time)
+    {
+        foreach ($this->extensions as $extension) {
+            $r = new ReflectionObject($extension);
+            if (filemtime($r->getFileName()) > $time) {
+                return false;
+            }
+        }
+
+        return $this->getLoader()->isFresh($name, $time);
+    }
+
+    public function resolveTemplate($names)
+    {
+        if (!is_array($names)) {
+            $names = array($names);
+        }
+
+        foreach ($names as $name) {
+            if ($name instanceof Twig_Template) {
+                return $name;
+            }
+
+            try {
+                return $this->loadTemplate($name);
+            } catch (Twig_Error_Loader $e) {
+            }
+        }
+
+        if (1 === count($names)) {
+            throw $e;
+        }
+
+        throw new Twig_Error_Loader(sprintf('Unable to find one of the following templates: "%s".', implode('", "', $names)));
+    }
+
+    /**
+     * Clears the internal template cache.
+     */
+    public function clearTemplateCache()
+    {
+        $this->loadedTemplates = array();
+    }
+
+    /**
+     * Clears the template cache files on the filesystem.
+     */
+    public function clearCacheFiles()
+    {
+        if (false === $this->cache) {
+            return;
+        }
+
+        foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($this->cache), RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
+            if ($file->isFile()) {
+                @unlink($file->getPathname());
+            }
+        }
+    }
+
+    /**
+     * Gets the Lexer instance.
+     *
+     * @return Twig_LexerInterface A Twig_LexerInterface instance
+     */
+    public function getLexer()
+    {
+        if (null === $this->lexer) {
+            $this->lexer = new Twig_Lexer($this);
+        }
+
+        return $this->lexer;
+    }
+
+    /**
+     * Sets the Lexer instance.
+     *
+     * @param Twig_LexerInterface A Twig_LexerInterface instance
+     */
+    public function setLexer(Twig_LexerInterface $lexer)
+    {
+        $this->lexer = $lexer;
+    }
+
+    /**
+     * Tokenizes a source code.
+     *
+     * @param string $source The template source code
+     * @param string $name   The template name
+     *
+     * @return Twig_TokenStream A Twig_TokenStream instance
+     */
+    public function tokenize($source, $name = null)
+    {
+        return $this->getLexer()->tokenize($source, $name);
+    }
+
+    /**
+     * Gets the Parser instance.
+     *
+     * @return Twig_ParserInterface A Twig_ParserInterface instance
+     */
+    public function getParser()
+    {
+        if (null === $this->parser) {
+            $this->parser = new Twig_Parser($this);
+        }
+
+        return $this->parser;
+    }
+
+    /**
+     * Sets the Parser instance.
+     *
+     * @param Twig_ParserInterface A Twig_ParserInterface instance
+     */
+    public function setParser(Twig_ParserInterface $parser)
+    {
+        $this->parser = $parser;
+    }
+
+    /**
+     * Parses a token stream.
+     *
+     * @param Twig_TokenStream $tokens A Twig_TokenStream instance
+     *
+     * @return Twig_Node_Module A Node tree
+     */
+    public function parse(Twig_TokenStream $tokens)
+    {
+        return $this->getParser()->parse($tokens);
+    }
+
+    /**
+     * Gets the Compiler instance.
+     *
+     * @return Twig_CompilerInterface A Twig_CompilerInterface instance
+     */
+    public function getCompiler()
+    {
+        if (null === $this->compiler) {
+            $this->compiler = new Twig_Compiler($this);
+        }
+
+        return $this->compiler;
+    }
+
+    /**
+     * Sets the Compiler instance.
+     *
+     * @param Twig_CompilerInterface $compiler A Twig_CompilerInterface instance
+     */
+    public function setCompiler(Twig_CompilerInterface $compiler)
+    {
+        $this->compiler = $compiler;
+    }
+
+    /**
+     * Compiles a Node.
+     *
+     * @param Twig_NodeInterface $node A Twig_NodeInterface instance
+     *
+     * @return string The compiled PHP source code
+     */
+    public function compile(Twig_NodeInterface $node)
+    {
+        return $this->getCompiler()->compile($node)->getSource();
+    }
+
+    /**
+     * Compiles a template source code.
+     *
+     * @param string $source The template source code
+     * @param string $name   The template name
+     *
+     * @return string The compiled PHP source code
+     */
+    public function compileSource($source, $name = null)
+    {
+        try {
+            return $this->compile($this->parse($this->tokenize($source, $name)));
+        } catch (Twig_Error $e) {
+            $e->setTemplateFile($name);
+            throw $e;
+        } catch (Exception $e) {
+            throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the compilation of a template ("%s").', $e->getMessage()), -1, $name, $e);
+        }
+    }
+
+    /**
+     * Sets the Loader instance.
+     *
+     * @param Twig_LoaderInterface $loader A Twig_LoaderInterface instance
+     */
+    public function setLoader(Twig_LoaderInterface $loader)
+    {
+        $this->loader = $loader;
+    }
+
+    /**
+     * Gets the Loader instance.
+     *
+     * @return Twig_LoaderInterface A Twig_LoaderInterface instance
+     */
+    public function getLoader()
+    {
+        if (null === $this->loader) {
+            throw new LogicException('You must set a loader first.');
+        }
+
+        return $this->loader;
+    }
+
+    /**
+     * Sets the default template charset.
+     *
+     * @param string $charset The default charset
+     */
+    public function setCharset($charset)
+    {
+        $this->charset = strtoupper($charset);
+    }
+
+    /**
+     * Gets the default template charset.
+     *
+     * @return string The default charset
+     */
+    public function getCharset()
+    {
+        return $this->charset;
+    }
+
+    /**
+     * Initializes the runtime environment.
+     */
+    public function initRuntime()
+    {
+        $this->runtimeInitialized = true;
+
+        foreach ($this->getExtensions() as $extension) {
+            $extension->initRuntime($this);
+        }
+    }
+
+    /**
+     * Returns true if the given extension is registered.
+     *
+     * @param string $name The extension name
+     *
+     * @return Boolean Whether the extension is registered or not
+     */
+    public function hasExtension($name)
+    {
+        return isset($this->extensions[$name]);
+    }
+
+    /**
+     * Gets an extension by name.
+     *
+     * @param string $name The extension name
+     *
+     * @return Twig_ExtensionInterface A Twig_ExtensionInterface instance
+     */
+    public function getExtension($name)
+    {
+        if (!isset($this->extensions[$name])) {
+            throw new Twig_Error_Runtime(sprintf('The "%s" extension is not enabled.', $name));
+        }
+
+        return $this->extensions[$name];
+    }
+
+    /**
+     * Registers an extension.
+     *
+     * @param Twig_ExtensionInterface $extension A Twig_ExtensionInterface instance
+     */
+    public function addExtension(Twig_ExtensionInterface $extension)
+    {
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to register extension "%s" as extensions have already been initialized.', $extension->getName()));
+        }
+
+        $this->extensions[$extension->getName()] = $extension;
+    }
+
+    /**
+     * Removes an extension by name.
+     *
+     * This method is deprecated and you should not use it.
+     *
+     * @param string $name The extension name
+     *
+     * @deprecated since 1.12 (to be removed in 2.0)
+     */
+    public function removeExtension($name)
+    {
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to remove extension "%s" as extensions have already been initialized.', $name));
+        }
+
+        unset($this->extensions[$name]);
+    }
+
+    /**
+     * Registers an array of extensions.
+     *
+     * @param array $extensions An array of extensions
+     */
+    public function setExtensions(array $extensions)
+    {
+        foreach ($extensions as $extension) {
+            $this->addExtension($extension);
+        }
+    }
+
+    /**
+     * Returns all registered extensions.
+     *
+     * @return array An array of extensions
+     */
+    public function getExtensions()
+    {
+        return $this->extensions;
+    }
+
+    /**
+     * Registers a Token Parser.
+     *
+     * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
+     */
+    public function addTokenParser(Twig_TokenParserInterface $parser)
+    {
+        if ($this->extensionInitialized) {
+            throw new LogicException('Unable to add a token parser as extensions have already been initialized.');
+        }
+
+        $this->staging->addTokenParser($parser);
+    }
+
+    /**
+     * Gets the registered Token Parsers.
+     *
+     * @return Twig_TokenParserBrokerInterface A broker containing token parsers
+     */
+    public function getTokenParsers()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->parsers;
+    }
+
+    /**
+     * Gets registered tags.
+     *
+     * Be warned that this method cannot return tags defined by Twig_TokenParserBrokerInterface classes.
+     *
+     * @return Twig_TokenParserInterface[] An array of Twig_TokenParserInterface instances
+     */
+    public function getTags()
+    {
+        $tags = array();
+        foreach ($this->getTokenParsers()->getParsers() as $parser) {
+            if ($parser instanceof Twig_TokenParserInterface) {
+                $tags[$parser->getTag()] = $parser;
+            }
+        }
+
+        return $tags;
+    }
+
+    /**
+     * Registers a Node Visitor.
+     *
+     * @param Twig_NodeVisitorInterface $visitor A Twig_NodeVisitorInterface instance
+     */
+    public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        if ($this->extensionInitialized) {
+            throw new LogicException('Unable to add a node visitor as extensions have already been initialized.');
+        }
+
+        $this->staging->addNodeVisitor($visitor);
+    }
+
+    /**
+     * Gets the registered Node Visitors.
+     *
+     * @return Twig_NodeVisitorInterface[] An array of Twig_NodeVisitorInterface instances
+     */
+    public function getNodeVisitors()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->visitors;
+    }
+
+    /**
+     * Registers a Filter.
+     *
+     * @param string|Twig_SimpleFilter               $name   The filter name or a Twig_SimpleFilter instance
+     * @param Twig_FilterInterface|Twig_SimpleFilter $filter A Twig_FilterInterface instance or a Twig_SimpleFilter instance
+     */
+    public function addFilter($name, $filter = null)
+    {
+        if (!$name instanceof Twig_SimpleFilter && !($filter instanceof Twig_SimpleFilter || $filter instanceof Twig_FilterInterface)) {
+            throw new LogicException('A filter must be an instance of Twig_FilterInterface or Twig_SimpleFilter');
+        }
+
+        if ($name instanceof Twig_SimpleFilter) {
+            $filter = $name;
+            $name = $filter->getName();
+        }
+        
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to add filter "%s" as extensions have already been initialized.', $name));
+        }
+        
+        $this->staging->addFilter($name, $filter);
+    }
+
+    /**
+     * Get a filter by name.
+     *
+     * Subclasses may override this method and load filters differently;
+     * so no list of filters is available.
+     *
+     * @param string $name The filter name
+     *
+     * @return Twig_Filter|false A Twig_Filter instance or false if the filter does not exist
+     */
+    public function getFilter($name)
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        if (isset($this->filters[$name])) {
+            return $this->filters[$name];
+        }
+
+        foreach ($this->filters as $pattern => $filter) {
+            $pattern = str_replace('\\*', '(.*?)', preg_quote($pattern, '#'), $count);
+
+            if ($count) {
+                if (preg_match('#^'.$pattern.'$#', $name, $matches)) {
+                    array_shift($matches);
+                    $filter->setArguments($matches);
+
+                    return $filter;
+                }
+            }
+        }
+
+        foreach ($this->filterCallbacks as $callback) {
+            if (false !== $filter = call_user_func($callback, $name)) {
+                return $filter;
+            }
+        }
+
+        return false;
+    }
+
+    public function registerUndefinedFilterCallback($callable)
+    {
+        $this->filterCallbacks[] = $callable;
+    }
+
+    /**
+     * Gets the registered Filters.
+     *
+     * Be warned that this method cannot return filters defined with registerUndefinedFunctionCallback.
+     *
+     * @return Twig_FilterInterface[] An array of Twig_FilterInterface instances
+     *
+     * @see registerUndefinedFilterCallback
+     */
+    public function getFilters()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->filters;
+    }
+
+    /**
+     * Registers a Test.
+     *
+     * @param string|Twig_SimpleTest             $name The test name or a Twig_SimpleTest instance
+     * @param Twig_TestInterface|Twig_SimpleTest $test A Twig_TestInterface instance or a Twig_SimpleTest instance
+     */
+    public function addTest($name, $test = null)
+    {
+        if (!$name instanceof Twig_SimpleTest && !($test instanceof Twig_SimpleTest || $test instanceof Twig_TestInterface)) {
+            throw new LogicException('A test must be an instance of Twig_TestInterface or Twig_SimpleTest');
+        }
+
+        if ($name instanceof Twig_SimpleTest) {
+            $test = $name;
+            $name = $test->getName();
+        }
+        
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to add test "%s" as extensions have already been initialized.', $name));
+        }
+
+        $this->staging->addTest($name, $test);
+    }
+
+    /**
+     * Gets the registered Tests.
+     *
+     * @return Twig_TestInterface[] An array of Twig_TestInterface instances
+     */
+    public function getTests()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->tests;
+    }
+
+    /**
+     * Gets a test by name.
+     *
+     * @param string $name The test name
+     *
+     * @return Twig_Test|false A Twig_Test instance or false if the test does not exist
+     */
+    public function getTest($name)
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        if (isset($this->tests[$name])) {
+            return $this->tests[$name];
+        }
+
+        return false;
+    }
+
+    /**
+     * Registers a Function.
+     *
+     * @param string|Twig_SimpleFunction                 $name     The function name or a Twig_SimpleFunction instance
+     * @param Twig_FunctionInterface|Twig_SimpleFunction $function A Twig_FunctionInterface instance or a Twig_SimpleFunction instance
+     */
+    public function addFunction($name, $function = null)
+    {
+        if (!$name instanceof Twig_SimpleFunction && !($function instanceof Twig_SimpleFunction || $function instanceof Twig_FunctionInterface)) {
+            throw new LogicException('A function must be an instance of Twig_FunctionInterface or Twig_SimpleFunction');
+        }
+
+        if ($name instanceof Twig_SimpleFunction) {
+            $function = $name;
+            $name = $function->getName();
+        }
+        
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to add function "%s" as extensions have already been initialized.', $name));
+        }
+        
+        $this->staging->addFunction($name, $function);
+    }
+
+    /**
+     * Get a function by name.
+     *
+     * Subclasses may override this method and load functions differently;
+     * so no list of functions is available.
+     *
+     * @param string $name function name
+     *
+     * @return Twig_Function|false A Twig_Function instance or false if the function does not exist
+     */
+    public function getFunction($name)
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        if (isset($this->functions[$name])) {
+            return $this->functions[$name];
+        }
+
+        foreach ($this->functions as $pattern => $function) {
+            $pattern = str_replace('\\*', '(.*?)', preg_quote($pattern, '#'), $count);
+
+            if ($count) {
+                if (preg_match('#^'.$pattern.'$#', $name, $matches)) {
+                    array_shift($matches);
+                    $function->setArguments($matches);
+
+                    return $function;
+                }
+            }
+        }
+
+        foreach ($this->functionCallbacks as $callback) {
+            if (false !== $function = call_user_func($callback, $name)) {
+                return $function;
+            }
+        }
+
+        return false;
+    }
+
+    public function registerUndefinedFunctionCallback($callable)
+    {
+        $this->functionCallbacks[] = $callable;
+    }
+
+    /**
+     * Gets registered functions.
+     *
+     * Be warned that this method cannot return functions defined with registerUndefinedFunctionCallback.
+     *
+     * @return Twig_FunctionInterface[] An array of Twig_FunctionInterface instances
+     *
+     * @see registerUndefinedFunctionCallback
+     */
+    public function getFunctions()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->functions;
+    }
+
+    /**
+     * Registers a Global.
+     *
+     * New globals can be added before compiling or rendering a template;
+     * but after, you can only update existing globals.
+     *
+     * @param string $name  The global name
+     * @param mixed  $value The global value
+     */
+    public function addGlobal($name, $value)
+    {
+        if ($this->extensionInitialized || $this->runtimeInitialized) {
+            if (null === $this->globals) {
+                $this->globals = $this->initGlobals();
+            }
+
+            /* This condition must be uncommented in Twig 2.0
+            if (!array_key_exists($name, $this->globals)) {
+                throw new LogicException(sprintf('Unable to add global "%s" as the runtime or the extensions have already been initialized.', $name));
+            }
+            */
+        }
+
+        if ($this->extensionInitialized || $this->runtimeInitialized) {
+            // update the value
+            $this->globals[$name] = $value;
+        } else {
+            $this->staging->addGlobal($name, $value);
+        }
+    }
+
+    /**
+     * Gets the registered Globals.
+     *
+     * @return array An array of globals
+     */
+    public function getGlobals()
+    {
+        if (!$this->runtimeInitialized && !$this->extensionInitialized) {
+            return $this->initGlobals();
+        }
+
+        if (null === $this->globals) {
+            $this->globals = $this->initGlobals();
+        }
+
+        return $this->globals;
+    }
+
+    /**
+     * Merges a context with the defined globals.
+     *
+     * @param array $context An array representing the context
+     *
+     * @return array The context merged with the globals
+     */
+    public function mergeGlobals(array $context)
+    {
+        // we don't use array_merge as the context being generally
+        // bigger than globals, this code is faster.
+        foreach ($this->getGlobals() as $key => $value) {
+            if (!array_key_exists($key, $context)) {
+                $context[$key] = $value;
+            }
+        }
+
+        return $context;
+    }
+
+    /**
+     * Gets the registered unary Operators.
+     *
+     * @return array An array of unary operators
+     */
+    public function getUnaryOperators()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->unaryOperators;
+    }
+
+    /**
+     * Gets the registered binary Operators.
+     *
+     * @return array An array of binary operators
+     */
+    public function getBinaryOperators()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->binaryOperators;
+    }
+
+    public function computeAlternatives($name, $items)
+    {
+        $alternatives = array();
+        foreach ($items as $item) {
+            $lev = levenshtein($name, $item);
+            if ($lev <= strlen($name) / 3 || false !== strpos($item, $name)) {
+                $alternatives[$item] = $lev;
+            }
+        }
+        asort($alternatives);
+
+        return array_keys($alternatives);
+    }
+
+    protected function initGlobals()
+    {
+        $globals = array();
+        foreach ($this->extensions as $extension) {
+            $extGlob = $extension->getGlobals();
+            if (!is_array($extGlob)) {
+                throw new UnexpectedValueException(sprintf('"%s::getGlobals()" must return an array of globals.', get_class($extension)));
+            }
+
+            $globals[] = $extGlob;
+        }
+
+        $globals[] = $this->staging->getGlobals();
+
+        return call_user_func_array('array_merge', $globals);
+    }
+
+    protected function initExtensions()
+    {
+        if ($this->extensionInitialized) {
+            return;
+        }
+
+        $this->extensionInitialized = true;
+        $this->parsers = new Twig_TokenParserBroker();
+        $this->filters = array();
+        $this->functions = array();
+        $this->tests = array();
+        $this->visitors = array();
+        $this->unaryOperators = array();
+        $this->binaryOperators = array();
+
+        foreach ($this->extensions as $extension) {
+            $this->initExtension($extension);
+        }
+        $this->initExtension($this->staging);
+    }
+
+    protected function initExtension(Twig_ExtensionInterface $extension)
+    {
+        // filters
+        foreach ($extension->getFilters() as $name => $filter) {
+            if ($name instanceof Twig_SimpleFilter) {
+                $filter = $name;
+                $name = $filter->getName();
+            } elseif ($filter instanceof Twig_SimpleFilter) {
+                $name = $filter->getName();
+            }
+
+            $this->filters[$name] = $filter;
+        }
+
+        // functions
+        foreach ($extension->getFunctions() as $name => $function) {
+            if ($name instanceof Twig_SimpleFunction) {
+                $function = $name;
+                $name = $function->getName();
+            } elseif ($function instanceof Twig_SimpleFunction) {
+                $name = $function->getName();
+            }
+
+            $this->functions[$name] = $function;
+        }
+
+        // tests
+        foreach ($extension->getTests() as $name => $test) {
+            if ($name instanceof Twig_SimpleTest) {
+                $test = $name;
+                $name = $test->getName();
+            } elseif ($test instanceof Twig_SimpleTest) {
+                $name = $test->getName();
+            }
+
+            $this->tests[$name] = $test;
+        }
+
+        // token parsers
+        foreach ($extension->getTokenParsers() as $parser) {
+            if ($parser instanceof Twig_TokenParserInterface) {
+                $this->parsers->addTokenParser($parser);
+            } elseif ($parser instanceof Twig_TokenParserBrokerInterface) {
+                $this->parsers->addTokenParserBroker($parser);
+            } else {
+                throw new LogicException('getTokenParsers() must return an array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances');
+            }
+        }
+
+        // node visitors
+        foreach ($extension->getNodeVisitors() as $visitor) {
+            $this->visitors[] = $visitor;
+        }
+
+        // operators
+        if ($operators = $extension->getOperators()) {
+            if (2 !== count($operators)) {
+                throw new InvalidArgumentException(sprintf('"%s::getOperators()" does not return a valid operators array.', get_class($extension)));
+            }
+
+            $this->unaryOperators = array_merge($this->unaryOperators, $operators[0]);
+            $this->binaryOperators = array_merge($this->binaryOperators, $operators[1]);
+        }
+    }
+
+    protected function writeCacheFile($file, $content)
+    {
+        $dir = dirname($file);
+        if (!is_dir($dir)) {
+            if (false === @mkdir($dir, 0777, true) && !is_dir($dir)) {
+                throw new RuntimeException(sprintf("Unable to create the cache directory (%s).", $dir));
+            }
+        } elseif (!is_writable($dir)) {
+            throw new RuntimeException(sprintf("Unable to write in the cache directory (%s).", $dir));
+        }
+
+        $tmpFile = tempnam(dirname($file), basename($file));
+        if (false !== @file_put_contents($tmpFile, $content)) {
+            // rename does not work on Win32 before 5.2.6
+            if (@rename($tmpFile, $file) || (@copy($tmpFile, $file) && unlink($tmpFile))) {
+                @chmod($file, 0666 & ~umask());
+
+                return;
+            }
+        }
+
+        throw new RuntimeException(sprintf('Failed to write cache file "%s".', $file));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Error.php b/vendor/twig/twig/lib/Twig/Error.php
new file mode 100644
index 00000000..61a4cfa0
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Error.php
@@ -0,0 +1,243 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig base exception.
+ *
+ * This exception class and its children must only be used when
+ * an error occurs during the loading of a template, when a syntax error
+ * is detected in a template, or when rendering a template. Other
+ * errors must use regular PHP exception classes (like when the template
+ * cache directory is not writable for instance).
+ *
+ * To help debugging template issues, this class tracks the original template
+ * name and line where the error occurred.
+ *
+ * Whenever possible, you must set these information (original template name
+ * and line number) yourself by passing them to the constructor. If some or all
+ * these information are not available from where you throw the exception, then
+ * this class will guess them automatically (when the line number is set to -1
+ * and/or the filename is set to null). As this is a costly operation, this
+ * can be disabled by passing false for both the filename and the line number
+ * when creating a new instance of this class.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error extends Exception
+{
+    protected $lineno;
+    protected $filename;
+    protected $rawMessage;
+    protected $previous;
+
+    /**
+     * Constructor.
+     *
+     * Set both the line number and the filename to false to
+     * disable automatic guessing of the original template name
+     * and line number.
+     *
+     * Set the line number to -1 to enable its automatic guessing.
+     * Set the filename to null to enable its automatic guessing.
+     *
+     * By default, automatic guessing is enabled.
+     *
+     * @param string    $message  The error message
+     * @param integer   $lineno   The template line where the error occurred
+     * @param string    $filename The template file name where the error occurred
+     * @param Exception $previous The previous exception
+     */
+    public function __construct($message, $lineno = -1, $filename = null, Exception $previous = null)
+    {
+        if (version_compare(PHP_VERSION, '5.3.0', '<')) {
+            $this->previous = $previous;
+            parent::__construct('');
+        } else {
+            parent::__construct('', 0, $previous);
+        }
+
+        $this->lineno = $lineno;
+        $this->filename = $filename;
+
+        if (-1 === $this->lineno || null === $this->filename) {
+            $this->guessTemplateInfo();
+        }
+
+        $this->rawMessage = $message;
+
+        $this->updateRepr();
+    }
+
+    /**
+     * Gets the raw message.
+     *
+     * @return string The raw message
+     */
+    public function getRawMessage()
+    {
+        return $this->rawMessage;
+    }
+
+    /**
+     * Gets the filename where the error occurred.
+     *
+     * @return string The filename
+     */
+    public function getTemplateFile()
+    {
+        return $this->filename;
+    }
+
+    /**
+     * Sets the filename where the error occurred.
+     *
+     * @param string $filename The filename
+     */
+    public function setTemplateFile($filename)
+    {
+        $this->filename = $filename;
+
+        $this->updateRepr();
+    }
+
+    /**
+     * Gets the template line where the error occurred.
+     *
+     * @return integer The template line
+     */
+    public function getTemplateLine()
+    {
+        return $this->lineno;
+    }
+
+    /**
+     * Sets the template line where the error occurred.
+     *
+     * @param integer $lineno The template line
+     */
+    public function setTemplateLine($lineno)
+    {
+        $this->lineno = $lineno;
+
+        $this->updateRepr();
+    }
+
+    public function guess()
+    {
+        $this->guessTemplateInfo();
+        $this->updateRepr();
+    }
+
+    /**
+     * For PHP < 5.3.0, provides access to the getPrevious() method.
+     *
+     * @param string $method    The method name
+     * @param array  $arguments The parameters to be passed to the method
+     *
+     * @return Exception The previous exception or null
+     *
+     * @throws BadMethodCallException
+     */
+    public function __call($method, $arguments)
+    {
+        if ('getprevious' == strtolower($method)) {
+            return $this->previous;
+        }
+
+        throw new BadMethodCallException(sprintf('Method "Twig_Error::%s()" does not exist.', $method));
+    }
+
+    protected function updateRepr()
+    {
+        $this->message = $this->rawMessage;
+
+        $dot = false;
+        if ('.' === substr($this->message, -1)) {
+            $this->message = substr($this->message, 0, -1);
+            $dot = true;
+        }
+
+        if ($this->filename) {
+            if (is_string($this->filename) || (is_object($this->filename) && method_exists($this->filename, '__toString'))) {
+                $filename = sprintf('"%s"', $this->filename);
+            } else {
+                $filename = json_encode($this->filename);
+            }
+            $this->message .= sprintf(' in %s', $filename);
+        }
+
+        if ($this->lineno && $this->lineno >= 0) {
+            $this->message .= sprintf(' at line %d', $this->lineno);
+        }
+
+        if ($dot) {
+            $this->message .= '.';
+        }
+    }
+
+    protected function guessTemplateInfo()
+    {
+        $template = null;
+        $templateClass = null;
+
+        if (version_compare(phpversion(), '5.3.6', '>=')) {
+            $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS | DEBUG_BACKTRACE_PROVIDE_OBJECT);
+        } else {
+            $backtrace = debug_backtrace();
+        }
+
+        foreach ($backtrace as $trace) {
+            if (isset($trace['object']) && $trace['object'] instanceof Twig_Template && 'Twig_Template' !== get_class($trace['object'])) {
+                $currentClass = get_class($trace['object']);
+                $isEmbedContainer = 0 === strpos($templateClass, $currentClass);
+                if (null === $this->filename || ($this->filename == $trace['object']->getTemplateName() && !$isEmbedContainer)) {
+                    $template = $trace['object'];
+                    $templateClass = get_class($trace['object']);
+                }
+            }
+        }
+
+        // update template filename
+        if (null !== $template && null === $this->filename) {
+            $this->filename = $template->getTemplateName();
+        }
+
+        if (null === $template || $this->lineno > -1) {
+            return;
+        }
+
+        $r = new ReflectionObject($template);
+        $file = $r->getFileName();
+
+        $exceptions = array($e = $this);
+        while (($e instanceof self || method_exists($e, 'getPrevious')) && $e = $e->getPrevious()) {
+            $exceptions[] = $e;
+        }
+
+        while ($e = array_pop($exceptions)) {
+            $traces = $e->getTrace();
+            while ($trace = array_shift($traces)) {
+                if (!isset($trace['file']) || !isset($trace['line']) || $file != $trace['file']) {
+                    continue;
+                }
+
+                foreach ($template->getDebugInfo() as $codeLine => $templateLine) {
+                    if ($codeLine <= $trace['line']) {
+                        // update template line
+                        $this->lineno = $templateLine;
+
+                        return;
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Error/Loader.php b/vendor/twig/twig/lib/Twig/Error/Loader.php
new file mode 100644
index 00000000..68efb574
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Error/Loader.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when an error occurs during template loading.
+ *
+ * Automatic template information guessing is always turned off as
+ * if a template cannot be loaded, there is nothing to guess.
+ * However, when a template is loaded from another one, then, we need
+ * to find the current context and this is automatically done by
+ * Twig_Template::displayWithErrorHandling().
+ *
+ * This strategy makes Twig_Environment::resolveTemplate() much faster.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error_Loader extends Twig_Error
+{
+    public function __construct($message, $lineno = -1, $filename = null, Exception $previous = null)
+    {
+        parent::__construct($message, false, false, $previous);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Error/Runtime.php b/vendor/twig/twig/lib/Twig/Error/Runtime.php
new file mode 100644
index 00000000..8b6ceddb
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Error/Runtime.php
@@ -0,0 +1,20 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when an error occurs at runtime.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error_Runtime extends Twig_Error
+{
+}
diff --git a/vendor/twig/twig/lib/Twig/Error/Syntax.php b/vendor/twig/twig/lib/Twig/Error/Syntax.php
new file mode 100644
index 00000000..0f5c5792
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Error/Syntax.php
@@ -0,0 +1,20 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when a syntax error occurs during lexing or parsing of a template.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error_Syntax extends Twig_Error
+{
+}
diff --git a/vendor/twig/twig/lib/Twig/ExistsLoaderInterface.php b/vendor/twig/twig/lib/Twig/ExistsLoaderInterface.php
new file mode 100644
index 00000000..ce434765
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/ExistsLoaderInterface.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Adds an exists() method for loaders.
+ *
+ * @author Florin Patan <florinpatan@gmail.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_ExistsLoaderInterface
+{
+    /**
+     * Check if we have the source code of a template, given its name.
+     *
+     * @param string $name The name of the template to check if we can load
+     *
+     * @return boolean If the template source code is handled by this loader or not
+     */
+    public function exists($name);
+}
diff --git a/vendor/twig/twig/lib/Twig/ExpressionParser.php b/vendor/twig/twig/lib/Twig/ExpressionParser.php
new file mode 100644
index 00000000..9cf19344
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/ExpressionParser.php
@@ -0,0 +1,600 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Parses expressions.
+ *
+ * This parser implements a "Precedence climbing" algorithm.
+ *
+ * @see http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
+ * @see http://en.wikipedia.org/wiki/Operator-precedence_parser
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_ExpressionParser
+{
+    const OPERATOR_LEFT = 1;
+    const OPERATOR_RIGHT = 2;
+
+    protected $parser;
+    protected $unaryOperators;
+    protected $binaryOperators;
+
+    public function __construct(Twig_Parser $parser, array $unaryOperators, array $binaryOperators)
+    {
+        $this->parser = $parser;
+        $this->unaryOperators = $unaryOperators;
+        $this->binaryOperators = $binaryOperators;
+    }
+
+    public function parseExpression($precedence = 0)
+    {
+        $expr = $this->getPrimary();
+        $token = $this->parser->getCurrentToken();
+        while ($this->isBinary($token) && $this->binaryOperators[$token->getValue()]['precedence'] >= $precedence) {
+            $op = $this->binaryOperators[$token->getValue()];
+            $this->parser->getStream()->next();
+
+            if (isset($op['callable'])) {
+                $expr = call_user_func($op['callable'], $this->parser, $expr);
+            } else {
+                $expr1 = $this->parseExpression(self::OPERATOR_LEFT === $op['associativity'] ? $op['precedence'] + 1 : $op['precedence']);
+                $class = $op['class'];
+                $expr = new $class($expr, $expr1, $token->getLine());
+            }
+
+            $token = $this->parser->getCurrentToken();
+        }
+
+        if (0 === $precedence) {
+            return $this->parseConditionalExpression($expr);
+        }
+
+        return $expr;
+    }
+
+    protected function getPrimary()
+    {
+        $token = $this->parser->getCurrentToken();
+
+        if ($this->isUnary($token)) {
+            $operator = $this->unaryOperators[$token->getValue()];
+            $this->parser->getStream()->next();
+            $expr = $this->parseExpression($operator['precedence']);
+            $class = $operator['class'];
+
+            return $this->parsePostfixExpression(new $class($expr, $token->getLine()));
+        } elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+            $this->parser->getStream()->next();
+            $expr = $this->parseExpression();
+            $this->parser->getStream()->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'An opened parenthesis is not properly closed');
+
+            return $this->parsePostfixExpression($expr);
+        }
+
+        return $this->parsePrimaryExpression();
+    }
+
+    protected function parseConditionalExpression($expr)
+    {
+        while ($this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '?')) {
+            $this->parser->getStream()->next();
+            if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                $expr2 = $this->parseExpression();
+                if ($this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                    $this->parser->getStream()->next();
+                    $expr3 = $this->parseExpression();
+                } else {
+                    $expr3 = new Twig_Node_Expression_Constant('', $this->parser->getCurrentToken()->getLine());
+                }
+            } else {
+                $this->parser->getStream()->next();
+                $expr2 = $expr;
+                $expr3 = $this->parseExpression();
+            }
+
+            $expr = new Twig_Node_Expression_Conditional($expr, $expr2, $expr3, $this->parser->getCurrentToken()->getLine());
+        }
+
+        return $expr;
+    }
+
+    protected function isUnary(Twig_Token $token)
+    {
+        return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->unaryOperators[$token->getValue()]);
+    }
+
+    protected function isBinary(Twig_Token $token)
+    {
+        return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->binaryOperators[$token->getValue()]);
+    }
+
+    public function parsePrimaryExpression()
+    {
+        $token = $this->parser->getCurrentToken();
+        switch ($token->getType()) {
+            case Twig_Token::NAME_TYPE:
+                $this->parser->getStream()->next();
+                switch ($token->getValue()) {
+                    case 'true':
+                    case 'TRUE':
+                        $node = new Twig_Node_Expression_Constant(true, $token->getLine());
+                        break;
+
+                    case 'false':
+                    case 'FALSE':
+                        $node = new Twig_Node_Expression_Constant(false, $token->getLine());
+                        break;
+
+                    case 'none':
+                    case 'NONE':
+                    case 'null':
+                    case 'NULL':
+                        $node = new Twig_Node_Expression_Constant(null, $token->getLine());
+                        break;
+
+                    default:
+                        if ('(' === $this->parser->getCurrentToken()->getValue()) {
+                            $node = $this->getFunctionNode($token->getValue(), $token->getLine());
+                        } else {
+                            $node = new Twig_Node_Expression_Name($token->getValue(), $token->getLine());
+                        }
+                }
+                break;
+
+            case Twig_Token::NUMBER_TYPE:
+                $this->parser->getStream()->next();
+                $node = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+                break;
+
+            case Twig_Token::STRING_TYPE:
+            case Twig_Token::INTERPOLATION_START_TYPE:
+                $node = $this->parseStringExpression();
+                break;
+
+            default:
+                if ($token->test(Twig_Token::PUNCTUATION_TYPE, '[')) {
+                    $node = $this->parseArrayExpression();
+                } elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '{')) {
+                    $node = $this->parseHashExpression();
+                } else {
+                    throw new Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s"', Twig_Token::typeToEnglish($token->getType(), $token->getLine()), $token->getValue()), $token->getLine(), $this->parser->getFilename());
+                }
+        }
+
+        return $this->parsePostfixExpression($node);
+    }
+
+    public function parseStringExpression()
+    {
+        $stream = $this->parser->getStream();
+
+        $nodes = array();
+        // a string cannot be followed by another string in a single expression
+        $nextCanBeString = true;
+        while (true) {
+            if ($stream->test(Twig_Token::STRING_TYPE) && $nextCanBeString) {
+                $token = $stream->next();
+                $nodes[] = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+                $nextCanBeString = false;
+            } elseif ($stream->test(Twig_Token::INTERPOLATION_START_TYPE)) {
+                $stream->next();
+                $nodes[] = $this->parseExpression();
+                $stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
+                $nextCanBeString = true;
+            } else {
+                break;
+            }
+        }
+
+        $expr = array_shift($nodes);
+        foreach ($nodes as $node) {
+            $expr = new Twig_Node_Expression_Binary_Concat($expr, $node, $node->getLine());
+        }
+
+        return $expr;
+    }
+
+    public function parseArrayExpression()
+    {
+        $stream = $this->parser->getStream();
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '[', 'An array element was expected');
+
+        $node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
+        $first = true;
+        while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
+            if (!$first) {
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'An array element must be followed by a comma');
+
+                // trailing ,?
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
+                    break;
+                }
+            }
+            $first = false;
+
+            $node->addElement($this->parseExpression());
+        }
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, ']', 'An opened array is not properly closed');
+
+        return $node;
+    }
+
+    public function parseHashExpression()
+    {
+        $stream = $this->parser->getStream();
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '{', 'A hash element was expected');
+
+        $node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
+        $first = true;
+        while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
+            if (!$first) {
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'A hash value must be followed by a comma');
+
+                // trailing ,?
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
+                    break;
+                }
+            }
+            $first = false;
+
+            // a hash key can be:
+            //
+            //  * a number -- 12
+            //  * a string -- 'a'
+            //  * a name, which is equivalent to a string -- a
+            //  * an expression, which must be enclosed in parentheses -- (1 + 2)
+            if ($stream->test(Twig_Token::STRING_TYPE) || $stream->test(Twig_Token::NAME_TYPE) || $stream->test(Twig_Token::NUMBER_TYPE)) {
+                $token = $stream->next();
+                $key = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+            } elseif ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+                $key = $this->parseExpression();
+            } else {
+                $current = $stream->getCurrent();
+
+                throw new Twig_Error_Syntax(sprintf('A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s"', Twig_Token::typeToEnglish($current->getType(), $current->getLine()), $current->getValue()), $current->getLine(), $this->parser->getFilename());
+            }
+
+            $stream->expect(Twig_Token::PUNCTUATION_TYPE, ':', 'A hash key must be followed by a colon (:)');
+            $value = $this->parseExpression();
+
+            $node->addElement($value, $key);
+        }
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '}', 'An opened hash is not properly closed');
+
+        return $node;
+    }
+
+    public function parsePostfixExpression($node)
+    {
+        while (true) {
+            $token = $this->parser->getCurrentToken();
+            if ($token->getType() == Twig_Token::PUNCTUATION_TYPE) {
+                if ('.' == $token->getValue() || '[' == $token->getValue()) {
+                    $node = $this->parseSubscriptExpression($node);
+                } elseif ('|' == $token->getValue()) {
+                    $node = $this->parseFilterExpression($node);
+                } else {
+                    break;
+                }
+            } else {
+                break;
+            }
+        }
+
+        return $node;
+    }
+
+    public function getFunctionNode($name, $line)
+    {
+        switch ($name) {
+            case 'parent':
+                $args = $this->parseArguments();
+                if (!count($this->parser->getBlockStack())) {
+                    throw new Twig_Error_Syntax('Calling "parent" outside a block is forbidden', $line, $this->parser->getFilename());
+                }
+
+                if (!$this->parser->getParent() && !$this->parser->hasTraits()) {
+                    throw new Twig_Error_Syntax('Calling "parent" on a template that does not extend nor "use" another template is forbidden', $line, $this->parser->getFilename());
+                }
+
+                return new Twig_Node_Expression_Parent($this->parser->peekBlockStack(), $line);
+            case 'block':
+                return new Twig_Node_Expression_BlockReference($this->parseArguments()->getNode(0), false, $line);
+            case 'attribute':
+                $args = $this->parseArguments();
+                if (count($args) < 2) {
+                    throw new Twig_Error_Syntax('The "attribute" function takes at least two arguments (the variable and the attributes)', $line, $this->parser->getFilename());
+                }
+
+                return new Twig_Node_Expression_GetAttr($args->getNode(0), $args->getNode(1), count($args) > 2 ? $args->getNode(2) : new Twig_Node_Expression_Array(array(), $line), Twig_TemplateInterface::ANY_CALL, $line);
+            default:
+                if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
+                    $arguments = new Twig_Node_Expression_Array(array(), $line);
+                    foreach ($this->parseArguments() as $n) {
+                        $arguments->addElement($n);
+                    }
+
+                    $node = new Twig_Node_Expression_MethodCall($alias['node'], $alias['name'], $arguments, $line);
+                    $node->setAttribute('safe', true);
+
+                    return $node;
+                }
+
+                $args = $this->parseArguments(true);
+                $class = $this->getFunctionNodeClass($name, $line);
+
+                return new $class($name, $args, $line);
+        }
+    }
+
+    public function parseSubscriptExpression($node)
+    {
+        $stream = $this->parser->getStream();
+        $token = $stream->next();
+        $lineno = $token->getLine();
+        $arguments = new Twig_Node_Expression_Array(array(), $lineno);
+        $type = Twig_TemplateInterface::ANY_CALL;
+        if ($token->getValue() == '.') {
+            $token = $stream->next();
+            if (
+                $token->getType() == Twig_Token::NAME_TYPE
+                ||
+                $token->getType() == Twig_Token::NUMBER_TYPE
+                ||
+                ($token->getType() == Twig_Token::OPERATOR_TYPE && preg_match(Twig_Lexer::REGEX_NAME, $token->getValue()))
+            ) {
+                $arg = new Twig_Node_Expression_Constant($token->getValue(), $lineno);
+
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+                    $type = Twig_TemplateInterface::METHOD_CALL;
+                    foreach ($this->parseArguments() as $n) {
+                        $arguments->addElement($n);
+                    }
+                }
+            } else {
+                throw new Twig_Error_Syntax('Expected name or number', $lineno, $this->parser->getFilename());
+            }
+
+            if ($node instanceof Twig_Node_Expression_Name && null !== $this->parser->getImportedSymbol('template', $node->getAttribute('name'))) {
+                if (!$arg instanceof Twig_Node_Expression_Constant) {
+                    throw new Twig_Error_Syntax(sprintf('Dynamic macro names are not supported (called on "%s")', $node->getAttribute('name')), $token->getLine(), $this->parser->getFilename());
+                }
+
+                $node = new Twig_Node_Expression_MethodCall($node, 'get'.$arg->getAttribute('value'), $arguments, $lineno);
+                $node->setAttribute('safe', true);
+
+                return $node;
+            }
+        } else {
+            $type = Twig_TemplateInterface::ARRAY_CALL;
+
+            // slice?
+            $slice = false;
+            if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                $slice = true;
+                $arg = new Twig_Node_Expression_Constant(0, $token->getLine());
+            } else {
+                $arg = $this->parseExpression();
+            }
+
+            if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                $slice = true;
+                $stream->next();
+            }
+
+            if ($slice) {
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
+                    $length = new Twig_Node_Expression_Constant(null, $token->getLine());
+                } else {
+                    $length = $this->parseExpression();
+                }
+
+                $class = $this->getFilterNodeClass('slice', $token->getLine());
+                $arguments = new Twig_Node(array($arg, $length));
+                $filter = new $class($node, new Twig_Node_Expression_Constant('slice', $token->getLine()), $arguments, $token->getLine());
+
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
+
+                return $filter;
+            }
+
+            $stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
+        }
+
+        return new Twig_Node_Expression_GetAttr($node, $arg, $arguments, $type, $lineno);
+    }
+
+    public function parseFilterExpression($node)
+    {
+        $this->parser->getStream()->next();
+
+        return $this->parseFilterExpressionRaw($node);
+    }
+
+    public function parseFilterExpressionRaw($node, $tag = null)
+    {
+        while (true) {
+            $token = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE);
+
+            $name = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+            if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+                $arguments = new Twig_Node();
+            } else {
+                $arguments = $this->parseArguments(true);
+            }
+
+            $class = $this->getFilterNodeClass($name->getAttribute('value'), $token->getLine());
+
+            $node = new $class($node, $name, $arguments, $token->getLine(), $tag);
+
+            if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '|')) {
+                break;
+            }
+
+            $this->parser->getStream()->next();
+        }
+
+        return $node;
+    }
+
+    /**
+     * Parses arguments.
+     *
+     * @param Boolean $namedArguments Whether to allow named arguments or not
+     * @param Boolean $definition     Whether we are parsing arguments for a function definition
+     */
+    public function parseArguments($namedArguments = false, $definition = false)
+    {
+        $args = array();
+        $stream = $this->parser->getStream();
+
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
+        while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ')')) {
+            if (!empty($args)) {
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'Arguments must be separated by a comma');
+            }
+
+            if ($definition) {
+                $token = $stream->expect(Twig_Token::NAME_TYPE, null, 'An argument must be a name');
+                $value = new Twig_Node_Expression_Name($token->getValue(), $this->parser->getCurrentToken()->getLine());
+            } else {
+                $value = $this->parseExpression();
+            }
+
+            $name = null;
+            if ($namedArguments && $stream->test(Twig_Token::OPERATOR_TYPE, '=')) {
+                $token = $stream->next();
+                if (!$value instanceof Twig_Node_Expression_Name) {
+                    throw new Twig_Error_Syntax(sprintf('A parameter name must be a string, "%s" given', get_class($value)), $token->getLine(), $this->parser->getFilename());
+                }
+                $name = $value->getAttribute('name');
+
+                if ($definition) {
+                    $value = $this->parsePrimaryExpression();
+
+                    if (!$this->checkConstantExpression($value)) {
+                        throw new Twig_Error_Syntax(sprintf('A default value for an argument must be a constant (a boolean, a string, a number, or an array).'), $token->getLine(), $this->parser->getFilename());
+                    }
+                } else {
+                    $value = $this->parseExpression();
+                }
+            }
+
+            if ($definition) {
+                if (null === $name) {
+                    $name = $value->getAttribute('name');
+                    $value = new Twig_Node_Expression_Constant(null, $this->parser->getCurrentToken()->getLine());
+                }
+                $args[$name] = $value;
+            } else {
+                if (null === $name) {
+                    $args[] = $value;
+                } else {
+                    $args[$name] = $value;
+                }
+            }
+        }
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'A list of arguments must be closed by a parenthesis');
+
+        return new Twig_Node($args);
+    }
+
+    public function parseAssignmentExpression()
+    {
+        $targets = array();
+        while (true) {
+            $token = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE, null, 'Only variables can be assigned to');
+            if (in_array($token->getValue(), array('true', 'false', 'none'))) {
+                throw new Twig_Error_Syntax(sprintf('You cannot assign a value to "%s"', $token->getValue()), $token->getLine(), $this->parser->getFilename());
+            }
+            $targets[] = new Twig_Node_Expression_AssignName($token->getValue(), $token->getLine());
+
+            if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                break;
+            }
+            $this->parser->getStream()->next();
+        }
+
+        return new Twig_Node($targets);
+    }
+
+    public function parseMultitargetExpression()
+    {
+        $targets = array();
+        while (true) {
+            $targets[] = $this->parseExpression();
+            if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                break;
+            }
+            $this->parser->getStream()->next();
+        }
+
+        return new Twig_Node($targets);
+    }
+
+    protected function getFunctionNodeClass($name, $line)
+    {
+        $env = $this->parser->getEnvironment();
+
+        if (false === $function = $env->getFunction($name)) {
+            $message = sprintf('The function "%s" does not exist', $name);
+            if ($alternatives = $env->computeAlternatives($name, array_keys($env->getFunctions()))) {
+                $message = sprintf('%s. Did you mean "%s"', $message, implode('", "', $alternatives));
+            }
+
+            throw new Twig_Error_Syntax($message, $line, $this->parser->getFilename());
+        }
+
+        if ($function instanceof Twig_SimpleFunction) {
+            return $function->getNodeClass();
+        }
+
+        return $function instanceof Twig_Function_Node ? $function->getClass() : 'Twig_Node_Expression_Function';
+    }
+
+    protected function getFilterNodeClass($name, $line)
+    {
+        $env = $this->parser->getEnvironment();
+
+        if (false === $filter = $env->getFilter($name)) {
+            $message = sprintf('The filter "%s" does not exist', $name);
+            if ($alternatives = $env->computeAlternatives($name, array_keys($env->getFilters()))) {
+                $message = sprintf('%s. Did you mean "%s"', $message, implode('", "', $alternatives));
+            }
+
+            throw new Twig_Error_Syntax($message, $line, $this->parser->getFilename());
+        }
+
+        if ($filter instanceof Twig_SimpleFilter) {
+            return $filter->getNodeClass();
+        }
+
+        return $filter instanceof Twig_Filter_Node ? $filter->getClass() : 'Twig_Node_Expression_Filter';
+    }
+
+    // checks that the node only contains "constant" elements
+    protected function checkConstantExpression(Twig_NodeInterface $node)
+    {
+        if (!($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array)) {
+            return false;
+        }
+
+        foreach ($node as $n) {
+            if (!$this->checkConstantExpression($n)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension.php b/vendor/twig/twig/lib/Twig/Extension.php
new file mode 100644
index 00000000..931fc033
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension.php
@@ -0,0 +1,93 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Extension implements Twig_ExtensionInterface
+{
+    /**
+     * Initializes the runtime environment.
+     *
+     * This is where you can load some file that contains filter functions for instance.
+     *
+     * @param Twig_Environment $environment The current Twig_Environment instance
+     */
+    public function initRuntime(Twig_Environment $environment)
+    {
+    }
+
+    /**
+     * Returns the token parser instances to add to the existing list.
+     *
+     * @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
+     */
+    public function getTokenParsers()
+    {
+        return array();
+    }
+
+    /**
+     * Returns the node visitor instances to add to the existing list.
+     *
+     * @return array An array of Twig_NodeVisitorInterface instances
+     */
+    public function getNodeVisitors()
+    {
+        return array();
+    }
+
+    /**
+     * Returns a list of filters to add to the existing list.
+     *
+     * @return array An array of filters
+     */
+    public function getFilters()
+    {
+        return array();
+    }
+
+    /**
+     * Returns a list of tests to add to the existing list.
+     *
+     * @return array An array of tests
+     */
+    public function getTests()
+    {
+        return array();
+    }
+
+    /**
+     * Returns a list of functions to add to the existing list.
+     *
+     * @return array An array of functions
+     */
+    public function getFunctions()
+    {
+        return array();
+    }
+
+    /**
+     * Returns a list of operators to add to the existing list.
+     *
+     * @return array An array of operators
+     */
+    public function getOperators()
+    {
+        return array();
+    }
+
+    /**
+     * Returns a list of global variables to add to the existing list.
+     *
+     * @return array An array of global variables
+     */
+    public function getGlobals()
+    {
+        return array();
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension/Core.php b/vendor/twig/twig/lib/Twig/Extension/Core.php
new file mode 100644
index 00000000..e68687b4
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension/Core.php
@@ -0,0 +1,1355 @@
+<?php
+
+if (!defined('ENT_SUBSTITUTE')) {
+    define('ENT_SUBSTITUTE', 8);
+}
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Core extends Twig_Extension
+{
+    protected $dateFormats = array('F j, Y H:i', '%d days');
+    protected $numberFormat = array(0, '.', ',');
+    protected $timezone = null;
+
+    /**
+     * Sets the default format to be used by the date filter.
+     *
+     * @param string $format             The default date format string
+     * @param string $dateIntervalFormat The default date interval format string
+     */
+    public function setDateFormat($format = null, $dateIntervalFormat = null)
+    {
+        if (null !== $format) {
+            $this->dateFormats[0] = $format;
+        }
+
+        if (null !== $dateIntervalFormat) {
+            $this->dateFormats[1] = $dateIntervalFormat;
+        }
+    }
+
+    /**
+     * Gets the default format to be used by the date filter.
+     *
+     * @return array The default date format string and the default date interval format string
+     */
+    public function getDateFormat()
+    {
+        return $this->dateFormats;
+    }
+
+    /**
+     * Sets the default timezone to be used by the date filter.
+     *
+     * @param DateTimeZone|string $timezone The default timezone string or a DateTimeZone object
+     */
+    public function setTimezone($timezone)
+    {
+        $this->timezone = $timezone instanceof DateTimeZone ? $timezone : new DateTimeZone($timezone);
+    }
+
+    /**
+     * Gets the default timezone to be used by the date filter.
+     *
+     * @return DateTimeZone The default timezone currently in use
+     */
+    public function getTimezone()
+    {
+        if (null === $this->timezone) {
+            $this->timezone = new DateTimeZone(date_default_timezone_get());
+        }
+
+        return $this->timezone;
+    }
+
+    /**
+     * Sets the default format to be used by the number_format filter.
+     *
+     * @param integer $decimal      The number of decimal places to use.
+     * @param string  $decimalPoint The character(s) to use for the decimal point.
+     * @param string  $thousandSep  The character(s) to use for the thousands separator.
+     */
+    public function setNumberFormat($decimal, $decimalPoint, $thousandSep)
+    {
+        $this->numberFormat = array($decimal, $decimalPoint, $thousandSep);
+    }
+
+    /**
+     * Get the default format used by the number_format filter.
+     *
+     * @return array The arguments for number_format()
+     */
+    public function getNumberFormat()
+    {
+        return $this->numberFormat;
+    }
+
+    /**
+     * Returns the token parser instance to add to the existing list.
+     *
+     * @return array An array of Twig_TokenParser instances
+     */
+    public function getTokenParsers()
+    {
+        return array(
+            new Twig_TokenParser_For(),
+            new Twig_TokenParser_If(),
+            new Twig_TokenParser_Extends(),
+            new Twig_TokenParser_Include(),
+            new Twig_TokenParser_Block(),
+            new Twig_TokenParser_Use(),
+            new Twig_TokenParser_Filter(),
+            new Twig_TokenParser_Macro(),
+            new Twig_TokenParser_Import(),
+            new Twig_TokenParser_From(),
+            new Twig_TokenParser_Set(),
+            new Twig_TokenParser_Spaceless(),
+            new Twig_TokenParser_Flush(),
+            new Twig_TokenParser_Do(),
+            new Twig_TokenParser_Embed(),
+        );
+    }
+
+    /**
+     * Returns a list of filters to add to the existing list.
+     *
+     * @return array An array of filters
+     */
+    public function getFilters()
+    {
+        $filters = array(
+            // formatting filters
+            new Twig_SimpleFilter('date', 'twig_date_format_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('date_modify', 'twig_date_modify_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('format', 'sprintf'),
+            new Twig_SimpleFilter('replace', 'strtr'),
+            new Twig_SimpleFilter('number_format', 'twig_number_format_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('abs', 'abs'),
+
+            // encoding
+            new Twig_SimpleFilter('url_encode', 'twig_urlencode_filter'),
+            new Twig_SimpleFilter('json_encode', 'twig_jsonencode_filter'),
+            new Twig_SimpleFilter('convert_encoding', 'twig_convert_encoding'),
+
+            // string filters
+            new Twig_SimpleFilter('title', 'twig_title_string_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('capitalize', 'twig_capitalize_string_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('upper', 'strtoupper'),
+            new Twig_SimpleFilter('lower', 'strtolower'),
+            new Twig_SimpleFilter('striptags', 'strip_tags'),
+            new Twig_SimpleFilter('trim', 'trim'),
+            new Twig_SimpleFilter('nl2br', 'nl2br', array('pre_escape' => 'html', 'is_safe' => array('html'))),
+
+            // array helpers
+            new Twig_SimpleFilter('join', 'twig_join_filter'),
+            new Twig_SimpleFilter('split', 'twig_split_filter'),
+            new Twig_SimpleFilter('sort', 'twig_sort_filter'),
+            new Twig_SimpleFilter('merge', 'twig_array_merge'),
+            new Twig_SimpleFilter('batch', 'twig_array_batch'),
+
+            // string/array filters
+            new Twig_SimpleFilter('reverse', 'twig_reverse_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('length', 'twig_length_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('slice', 'twig_slice', array('needs_environment' => true)),
+            new Twig_SimpleFilter('first', 'twig_first', array('needs_environment' => true)),
+            new Twig_SimpleFilter('last', 'twig_last', array('needs_environment' => true)),
+
+            // iteration and runtime
+            new Twig_SimpleFilter('default', '_twig_default_filter', array('node_class' => 'Twig_Node_Expression_Filter_Default')),
+            new Twig_SimpleFilter('keys', 'twig_get_array_keys_filter'),
+
+            // escaping
+            new Twig_SimpleFilter('escape', 'twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
+            new Twig_SimpleFilter('e', 'twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
+        );
+
+        if (function_exists('mb_get_info')) {
+            $filters[] = new Twig_SimpleFilter('upper', 'twig_upper_filter', array('needs_environment' => true));
+            $filters[] = new Twig_SimpleFilter('lower', 'twig_lower_filter', array('needs_environment' => true));
+        }
+
+        return $filters;
+    }
+
+    /**
+     * Returns a list of global functions to add to the existing list.
+     *
+     * @return array An array of global functions
+     */
+    public function getFunctions()
+    {
+        return array(
+            new Twig_SimpleFunction('range', 'range'),
+            new Twig_SimpleFunction('constant', 'twig_constant'),
+            new Twig_SimpleFunction('cycle', 'twig_cycle'),
+            new Twig_SimpleFunction('random', 'twig_random', array('needs_environment' => true)),
+            new Twig_SimpleFunction('date', 'twig_date_converter', array('needs_environment' => true)),
+            new Twig_SimpleFunction('include', 'twig_include', array('needs_environment' => true, 'needs_context' => true, 'is_safe' => array('all'))),
+        );
+    }
+
+    /**
+     * Returns a list of tests to add to the existing list.
+     *
+     * @return array An array of tests
+     */
+    public function getTests()
+    {
+        return array(
+            new Twig_SimpleTest('even', null, array('node_class' => 'Twig_Node_Expression_Test_Even')),
+            new Twig_SimpleTest('odd', null, array('node_class' => 'Twig_Node_Expression_Test_Odd')),
+            new Twig_SimpleTest('defined', null, array('node_class' => 'Twig_Node_Expression_Test_Defined')),
+            new Twig_SimpleTest('sameas', null, array('node_class' => 'Twig_Node_Expression_Test_Sameas')),
+            new Twig_SimpleTest('none', null, array('node_class' => 'Twig_Node_Expression_Test_Null')),
+            new Twig_SimpleTest('null', null, array('node_class' => 'Twig_Node_Expression_Test_Null')),
+            new Twig_SimpleTest('divisibleby', null, array('node_class' => 'Twig_Node_Expression_Test_Divisibleby')),
+            new Twig_SimpleTest('constant', null, array('node_class' => 'Twig_Node_Expression_Test_Constant')),
+            new Twig_SimpleTest('empty', 'twig_test_empty'),
+            new Twig_SimpleTest('iterable', 'twig_test_iterable'),
+        );
+    }
+
+    /**
+     * Returns a list of operators to add to the existing list.
+     *
+     * @return array An array of operators
+     */
+    public function getOperators()
+    {
+        return array(
+            array(
+                'not' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Not'),
+                '-'   => array('precedence' => 500, 'class' => 'Twig_Node_Expression_Unary_Neg'),
+                '+'   => array('precedence' => 500, 'class' => 'Twig_Node_Expression_Unary_Pos'),
+            ),
+            array(
+                'or'     => array('precedence' => 10, 'class' => 'Twig_Node_Expression_Binary_Or', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'and'    => array('precedence' => 15, 'class' => 'Twig_Node_Expression_Binary_And', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'b-or'   => array('precedence' => 16, 'class' => 'Twig_Node_Expression_Binary_BitwiseOr', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'b-xor'  => array('precedence' => 17, 'class' => 'Twig_Node_Expression_Binary_BitwiseXor', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'b-and'  => array('precedence' => 18, 'class' => 'Twig_Node_Expression_Binary_BitwiseAnd', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '=='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Equal', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '!='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '<'      => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Less', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '>'      => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Greater', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '>='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_GreaterEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '<='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_LessEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'not in' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotIn', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'in'     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_In', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '..'     => array('precedence' => 25, 'class' => 'Twig_Node_Expression_Binary_Range', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '+'      => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Add', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '-'      => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Sub', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '~'      => array('precedence' => 40, 'class' => 'Twig_Node_Expression_Binary_Concat', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '*'      => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mul', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '/'      => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Div', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '//'     => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_FloorDiv', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '%'      => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mod', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'is'     => array('precedence' => 100, 'callable' => array($this, 'parseTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'is not' => array('precedence' => 100, 'callable' => array($this, 'parseNotTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '**'     => array('precedence' => 200, 'class' => 'Twig_Node_Expression_Binary_Power', 'associativity' => Twig_ExpressionParser::OPERATOR_RIGHT),
+            ),
+        );
+    }
+
+    public function parseNotTestExpression(Twig_Parser $parser, $node)
+    {
+        return new Twig_Node_Expression_Unary_Not($this->parseTestExpression($parser, $node), $parser->getCurrentToken()->getLine());
+    }
+
+    public function parseTestExpression(Twig_Parser $parser, $node)
+    {
+        $stream = $parser->getStream();
+        $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+        $arguments = null;
+        if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+            $arguments = $parser->getExpressionParser()->parseArguments(true);
+        }
+
+        $class = $this->getTestNodeClass($parser, $name, $node->getLine());
+
+        return new $class($node, $name, $arguments, $parser->getCurrentToken()->getLine());
+    }
+
+    protected function getTestNodeClass(Twig_Parser $parser, $name, $line)
+    {
+        $env = $parser->getEnvironment();
+        $testMap = $env->getTests();
+        if (!isset($testMap[$name])) {
+            $message = sprintf('The test "%s" does not exist', $name);
+            if ($alternatives = $env->computeAlternatives($name, array_keys($env->getTests()))) {
+                $message = sprintf('%s. Did you mean "%s"', $message, implode('", "', $alternatives));
+            }
+
+            throw new Twig_Error_Syntax($message, $line, $parser->getFilename());
+        }
+
+        if ($testMap[$name] instanceof Twig_SimpleTest) {
+            return $testMap[$name]->getNodeClass();
+        }
+
+        return $testMap[$name] instanceof Twig_Test_Node ? $testMap[$name]->getClass() : 'Twig_Node_Expression_Test';
+    }
+
+    /**
+     * Returns the name of the extension.
+     *
+     * @return string The extension name
+     */
+    public function getName()
+    {
+        return 'core';
+    }
+}
+
+/**
+ * Cycles over a value.
+ *
+ * @param ArrayAccess|array $values   An array or an ArrayAccess instance
+ * @param integer           $position The cycle position
+ *
+ * @return string The next value in the cycle
+ */
+function twig_cycle($values, $position)
+{
+    if (!is_array($values) && !$values instanceof ArrayAccess) {
+        return $values;
+    }
+
+    return $values[$position % count($values)];
+}
+
+/**
+ * Returns a random value depending on the supplied parameter type:
+ * - a random item from a Traversable or array
+ * - a random character from a string
+ * - a random integer between 0 and the integer parameter
+ *
+ * @param Twig_Environment                 $env    A Twig_Environment instance
+ * @param Traversable|array|integer|string $values The values to pick a random item from
+ *
+ * @throws Twig_Error_Runtime When $values is an empty array (does not apply to an empty string which is returned as is).
+ *
+ * @return mixed A random value from the given sequence
+ */
+function twig_random(Twig_Environment $env, $values = null)
+{
+    if (null === $values) {
+        return mt_rand();
+    }
+
+    if (is_int($values) || is_float($values)) {
+        return $values < 0 ? mt_rand($values, 0) : mt_rand(0, $values);
+    }
+
+    if ($values instanceof Traversable) {
+        $values = iterator_to_array($values);
+    } elseif (is_string($values)) {
+        if ('' === $values) {
+            return '';
+        }
+        if (null !== $charset = $env->getCharset()) {
+            if ('UTF-8' != $charset) {
+                $values = twig_convert_encoding($values, 'UTF-8', $charset);
+            }
+
+            // unicode version of str_split()
+            // split at all positions, but not after the start and not before the end
+            $values = preg_split('/(?<!^)(?!$)/u', $values);
+
+            if ('UTF-8' != $charset) {
+                foreach ($values as $i => $value) {
+                    $values[$i] = twig_convert_encoding($value, $charset, 'UTF-8');
+                }
+            }
+        } else {
+            return $values[mt_rand(0, strlen($values) - 1)];
+        }
+    }
+
+    if (!is_array($values)) {
+        return $values;
+    }
+
+    if (0 === count($values)) {
+        throw new Twig_Error_Runtime('The random function cannot pick from an empty array.');
+    }
+
+    return $values[array_rand($values, 1)];
+}
+
+/**
+ * Converts a date to the given format.
+ *
+ * <pre>
+ *   {{ post.published_at|date("m/d/Y") }}
+ * </pre>
+ *
+ * @param Twig_Environment             $env      A Twig_Environment instance
+ * @param DateTime|DateInterval|string $date     A date
+ * @param string                       $format   A format
+ * @param DateTimeZone|string          $timezone A timezone
+ *
+ * @return string The formatted date
+ */
+function twig_date_format_filter(Twig_Environment $env, $date, $format = null, $timezone = null)
+{
+    if (null === $format) {
+        $formats = $env->getExtension('core')->getDateFormat();
+        $format = $date instanceof DateInterval ? $formats[1] : $formats[0];
+    }
+
+    if ($date instanceof DateInterval) {
+        return $date->format($format);
+    }
+
+    return twig_date_converter($env, $date, $timezone)->format($format);
+}
+
+/**
+ * Returns a new date object modified
+ *
+ * <pre>
+ *   {{ post.published_at|date_modify("-1day")|date("m/d/Y") }}
+ * </pre>
+ *
+ * @param Twig_Environment  $env      A Twig_Environment instance
+ * @param DateTime|string   $date     A date
+ * @param string            $modifier A modifier string
+ *
+ * @return DateTime A new date object
+ */
+function twig_date_modify_filter(Twig_Environment $env, $date, $modifier)
+{
+    $date = twig_date_converter($env, $date, false);
+    $date->modify($modifier);
+
+    return $date;
+}
+
+/**
+ * Converts an input to a DateTime instance.
+ *
+ * <pre>
+ *    {% if date(user.created_at) < date('+2days') %}
+ *      {# do something #}
+ *    {% endif %}
+ * </pre>
+ *
+ * @param Twig_Environment    $env      A Twig_Environment instance
+ * @param DateTime|string     $date     A date
+ * @param DateTimeZone|string $timezone A timezone
+ *
+ * @return DateTime A DateTime instance
+ */
+function twig_date_converter(Twig_Environment $env, $date = null, $timezone = null)
+{
+    // determine the timezone
+    if (!$timezone) {
+        $defaultTimezone = $env->getExtension('core')->getTimezone();
+    } elseif (!$timezone instanceof DateTimeZone) {
+        $defaultTimezone = new DateTimeZone($timezone);
+    } else {
+        $defaultTimezone = $timezone;
+    }
+
+    if ($date instanceof DateTime) {
+        $date = clone $date;
+        if (false !== $timezone) {
+            $date->setTimezone($defaultTimezone);
+        }
+
+        return $date;
+    }
+
+    $asString = (string) $date;
+    if (ctype_digit($asString) || (!empty($asString) && '-' === $asString[0] && ctype_digit(substr($asString, 1)))) {
+        $date = '@'.$date;
+    }
+
+    $date = new DateTime($date, $defaultTimezone);
+    if (false !== $timezone) {
+        $date->setTimezone($defaultTimezone);
+    }
+
+    return $date;
+}
+
+/**
+ * Number format filter.
+ *
+ * All of the formatting options can be left null, in that case the defaults will
+ * be used.  Supplying any of the parameters will override the defaults set in the
+ * environment object.
+ *
+ * @param Twig_Environment    $env          A Twig_Environment instance
+ * @param mixed               $number       A float/int/string of the number to format
+ * @param integer             $decimal      The number of decimal points to display.
+ * @param string              $decimalPoint The character(s) to use for the decimal point.
+ * @param string              $thousandSep  The character(s) to use for the thousands separator.
+ *
+ * @return string The formatted number
+ */
+function twig_number_format_filter(Twig_Environment $env, $number, $decimal = null, $decimalPoint = null, $thousandSep = null)
+{
+    $defaults = $env->getExtension('core')->getNumberFormat();
+    if (null === $decimal) {
+        $decimal = $defaults[0];
+    }
+
+    if (null === $decimalPoint) {
+        $decimalPoint = $defaults[1];
+    }
+
+    if (null === $thousandSep) {
+        $thousandSep = $defaults[2];
+    }
+
+    return number_format((float) $number, $decimal, $decimalPoint, $thousandSep);
+}
+
+/**
+ * URL encodes a string as a path segment or an array as a query string.
+ *
+ * @param string|array $url A URL or an array of query parameters
+ * @param bool         $raw true to use rawurlencode() instead of urlencode
+ *
+ * @return string The URL encoded value
+ */
+function twig_urlencode_filter($url, $raw = false)
+{
+    if (is_array($url)) {
+        return http_build_query($url, '', '&');
+    }
+
+    if ($raw) {
+        return rawurlencode($url);
+    }
+
+    return urlencode($url);
+}
+
+if (version_compare(PHP_VERSION, '5.3.0', '<')) {
+    /**
+     * JSON encodes a variable.
+     *
+     * @param mixed   $value   The value to encode.
+     * @param integer $options Not used on PHP 5.2.x
+     *
+     * @return mixed The JSON encoded value
+     */
+    function twig_jsonencode_filter($value, $options = 0)
+    {
+        if ($value instanceof Twig_Markup) {
+            $value = (string) $value;
+        } elseif (is_array($value)) {
+            array_walk_recursive($value, '_twig_markup2string');
+        }
+
+        return json_encode($value);
+    }
+} else {
+    /**
+     * JSON encodes a variable.
+     *
+     * @param mixed   $value   The value to encode.
+     * @param integer $options Bitmask consisting of JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT
+     *
+     * @return mixed The JSON encoded value
+     */
+    function twig_jsonencode_filter($value, $options = 0)
+    {
+        if ($value instanceof Twig_Markup) {
+            $value = (string) $value;
+        } elseif (is_array($value)) {
+            array_walk_recursive($value, '_twig_markup2string');
+        }
+
+        return json_encode($value, $options);
+    }
+}
+
+function _twig_markup2string(&$value)
+{
+    if ($value instanceof Twig_Markup) {
+        $value = (string) $value;
+    }
+}
+
+/**
+ * Merges an array with another one.
+ *
+ * <pre>
+ *  {% set items = { 'apple': 'fruit', 'orange': 'fruit' } %}
+ *
+ *  {% set items = items|merge({ 'peugeot': 'car' }) %}
+ *
+ *  {# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car' } #}
+ * </pre>
+ *
+ * @param array $arr1 An array
+ * @param array $arr2 An array
+ *
+ * @return array The merged array
+ */
+function twig_array_merge($arr1, $arr2)
+{
+    if (!is_array($arr1) || !is_array($arr2)) {
+        throw new Twig_Error_Runtime('The merge filter only works with arrays or hashes.');
+    }
+
+    return array_merge($arr1, $arr2);
+}
+
+/**
+ * Slices a variable.
+ *
+ * @param Twig_Environment $env          A Twig_Environment instance
+ * @param mixed            $item         A variable
+ * @param integer          $start        Start of the slice
+ * @param integer          $length       Size of the slice
+ * @param Boolean          $preserveKeys Whether to preserve key or not (when the input is an array)
+ *
+ * @return mixed The sliced variable
+ */
+function twig_slice(Twig_Environment $env, $item, $start, $length = null, $preserveKeys = false)
+{
+    if ($item instanceof Traversable) {
+        $item = iterator_to_array($item, false);
+    }
+
+    if (is_array($item)) {
+        return array_slice($item, $start, $length, $preserveKeys);
+    }
+
+    $item = (string) $item;
+
+    if (function_exists('mb_get_info') && null !== $charset = $env->getCharset()) {
+        return mb_substr($item, $start, null === $length ? mb_strlen($item, $charset) - $start : $length, $charset);
+    }
+
+    return null === $length ? substr($item, $start) : substr($item, $start, $length);
+}
+
+/**
+ * Returns the first element of the item.
+ *
+ * @param Twig_Environment $env  A Twig_Environment instance
+ * @param mixed            $item A variable
+ *
+ * @return mixed The first element of the item
+ */
+function twig_first(Twig_Environment $env, $item)
+{
+    $elements = twig_slice($env, $item, 0, 1, false);
+
+    return is_string($elements) ? $elements[0] : current($elements);
+}
+
+/**
+ * Returns the last element of the item.
+ *
+ * @param Twig_Environment $env  A Twig_Environment instance
+ * @param mixed            $item A variable
+ *
+ * @return mixed The last element of the item
+ */
+function twig_last(Twig_Environment $env, $item)
+{
+    $elements = twig_slice($env, $item, -1, 1, false);
+
+    return is_string($elements) ? $elements[0] : current($elements);
+}
+
+/**
+ * Joins the values to a string.
+ *
+ * The separator between elements is an empty string per default, you can define it with the optional parameter.
+ *
+ * <pre>
+ *  {{ [1, 2, 3]|join('|') }}
+ *  {# returns 1|2|3 #}
+ *
+ *  {{ [1, 2, 3]|join }}
+ *  {# returns 123 #}
+ * </pre>
+ *
+ * @param array  $value An array
+ * @param string $glue  The separator
+ *
+ * @return string The concatenated string
+ */
+function twig_join_filter($value, $glue = '')
+{
+    if ($value instanceof Traversable) {
+        $value = iterator_to_array($value, false);
+    }
+
+    return implode($glue, (array) $value);
+}
+
+/**
+ * Splits the string into an array.
+ *
+ * <pre>
+ *  {{ "one,two,three"|split(',') }}
+ *  {# returns [one, two, three] #}
+ *
+ *  {{ "one,two,three,four,five"|split(',', 3) }}
+ *  {# returns [one, two, "three,four,five"] #}
+ *
+ *  {{ "123"|split('') }}
+ *  {# returns [1, 2, 3] #}
+ *
+ *  {{ "aabbcc"|split('', 2) }}
+ *  {# returns [aa, bb, cc] #}
+ * </pre>
+ *
+ * @param string  $value     A string
+ * @param string  $delimiter The delimiter
+ * @param integer $limit     The limit
+ *
+ * @return array The split string as an array
+ */
+function twig_split_filter($value, $delimiter, $limit = null)
+{
+    if (empty($delimiter)) {
+        return str_split($value, null === $limit ? 1 : $limit);
+    }
+
+    return null === $limit ? explode($delimiter, $value) : explode($delimiter, $value, $limit);
+}
+
+// The '_default' filter is used internally to avoid using the ternary operator
+// which costs a lot for big contexts (before PHP 5.4). So, on average,
+// a function call is cheaper.
+function _twig_default_filter($value, $default = '')
+{
+    if (twig_test_empty($value)) {
+        return $default;
+    }
+
+    return $value;
+}
+
+/**
+ * Returns the keys for the given array.
+ *
+ * It is useful when you want to iterate over the keys of an array:
+ *
+ * <pre>
+ *  {% for key in array|keys %}
+ *      {# ... #}
+ *  {% endfor %}
+ * </pre>
+ *
+ * @param array $array An array
+ *
+ * @return array The keys
+ */
+function twig_get_array_keys_filter($array)
+{
+    if (is_object($array) && $array instanceof Traversable) {
+        return array_keys(iterator_to_array($array));
+    }
+
+    if (!is_array($array)) {
+        return array();
+    }
+
+    return array_keys($array);
+}
+
+/**
+ * Reverses a variable.
+ *
+ * @param Twig_Environment         $env          A Twig_Environment instance
+ * @param array|Traversable|string $item         An array, a Traversable instance, or a string
+ * @param Boolean                  $preserveKeys Whether to preserve key or not
+ *
+ * @return mixed The reversed input
+ */
+function twig_reverse_filter(Twig_Environment $env, $item, $preserveKeys = false)
+{
+    if (is_object($item) && $item instanceof Traversable) {
+        return array_reverse(iterator_to_array($item), $preserveKeys);
+    }
+
+    if (is_array($item)) {
+        return array_reverse($item, $preserveKeys);
+    }
+
+    if (null !== $charset = $env->getCharset()) {
+        $string = (string) $item;
+
+        if ('UTF-8' != $charset) {
+            $item = twig_convert_encoding($string, 'UTF-8', $charset);
+        }
+
+        preg_match_all('/./us', $item, $matches);
+
+        $string = implode('', array_reverse($matches[0]));
+
+        if ('UTF-8' != $charset) {
+            $string = twig_convert_encoding($string, $charset, 'UTF-8');
+        }
+
+        return $string;
+    }
+
+    return strrev((string) $item);
+}
+
+/**
+ * Sorts an array.
+ *
+ * @param array $array An array
+ */
+function twig_sort_filter($array)
+{
+    asort($array);
+
+    return $array;
+}
+
+/* used internally */
+function twig_in_filter($value, $compare)
+{
+    if (is_array($compare)) {
+        return in_array($value, $compare, is_object($value));
+    } elseif (is_string($compare)) {
+        if (!strlen($value)) {
+            return empty($compare);
+        }
+
+        return false !== strpos($compare, (string) $value);
+    } elseif ($compare instanceof Traversable) {
+        return in_array($value, iterator_to_array($compare, false), is_object($value));
+    }
+
+    return false;
+}
+
+/**
+ * Escapes a string.
+ *
+ * @param Twig_Environment $env        A Twig_Environment instance
+ * @param string           $string     The value to be escaped
+ * @param string           $strategy   The escaping strategy
+ * @param string           $charset    The charset
+ * @param Boolean          $autoescape Whether the function is called by the auto-escaping feature (true) or by the developer (false)
+ */
+function twig_escape_filter(Twig_Environment $env, $string, $strategy = 'html', $charset = null, $autoescape = false)
+{
+    if ($autoescape && $string instanceof Twig_Markup) {
+        return $string;
+    }
+
+    if (!is_string($string)) {
+        if (is_object($string) && method_exists($string, '__toString')) {
+            $string = (string) $string;
+        } else {
+            return $string;
+        }
+    }
+
+    if (null === $charset) {
+        $charset = $env->getCharset();
+    }
+
+    switch ($strategy) {
+        case 'html':
+            // see http://php.net/htmlspecialchars
+
+            // Using a static variable to avoid initializing the array
+            // each time the function is called. Moving the declaration on the
+            // top of the function slow downs other escaping strategies.
+            static $htmlspecialcharsCharsets = array(
+                'ISO-8859-1' => true, 'ISO8859-1' => true,
+                'ISO-8859-15' => true, 'ISO8859-15' => true,
+                'utf-8' => true, 'UTF-8' => true,
+                'CP866' => true, 'IBM866' => true, '866' => true,
+                'CP1251' => true, 'WINDOWS-1251' => true, 'WIN-1251' => true,
+                '1251' => true,
+                'CP1252' => true, 'WINDOWS-1252' => true, '1252' => true,
+                'KOI8-R' => true, 'KOI8-RU' => true, 'KOI8R' => true,
+                'BIG5' => true, '950' => true,
+                'GB2312' => true, '936' => true,
+                'BIG5-HKSCS' => true,
+                'SHIFT_JIS' => true, 'SJIS' => true, '932' => true,
+                'EUC-JP' => true, 'EUCJP' => true,
+                'ISO8859-5' => true, 'ISO-8859-5' => true, 'MACROMAN' => true,
+            );
+
+            if (isset($htmlspecialcharsCharsets[$charset])) {
+                return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
+            }
+
+            if (isset($htmlspecialcharsCharsets[strtoupper($charset)])) {
+                // cache the lowercase variant for future iterations
+                $htmlspecialcharsCharsets[$charset] = true;
+
+                return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
+            }
+
+            $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            $string = htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+
+            return twig_convert_encoding($string, $charset, 'UTF-8');
+
+        case 'js':
+            // escape all non-alphanumeric characters
+            // into their \xHH or \uHHHH representations
+            if ('UTF-8' != $charset) {
+                $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
+
+            if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
+                throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
+
+            $string = preg_replace_callback('#[^a-zA-Z0-9,\._]#Su', '_twig_escape_js_callback', $string);
+
+            if ('UTF-8' != $charset) {
+                $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
+
+            return $string;
+
+        case 'css':
+            if ('UTF-8' != $charset) {
+                $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
+
+            if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
+                throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
+
+            $string = preg_replace_callback('#[^a-zA-Z0-9]#Su', '_twig_escape_css_callback', $string);
+
+            if ('UTF-8' != $charset) {
+                $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
+
+            return $string;
+
+        case 'html_attr':
+            if ('UTF-8' != $charset) {
+                $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
+
+            if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
+                throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
+
+            $string = preg_replace_callback('#[^a-zA-Z0-9,\.\-_]#Su', '_twig_escape_html_attr_callback', $string);
+
+            if ('UTF-8' != $charset) {
+                $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
+
+            return $string;
+
+        case 'url':
+            // hackish test to avoid version_compare that is much slower, this works unless PHP releases a 5.10.*
+            // at that point however PHP 5.2.* support can be removed
+            if (PHP_VERSION < '5.3.0') {
+                return str_replace('%7E', '~', rawurlencode($string));
+            }
+
+            return rawurlencode($string);
+
+        default:
+            throw new Twig_Error_Runtime(sprintf('Invalid escaping strategy "%s" (valid ones: html, js, url, css, and html_attr).', $strategy));
+    }
+}
+
+/* used internally */
+function twig_escape_filter_is_safe(Twig_Node $filterArgs)
+{
+    foreach ($filterArgs as $arg) {
+        if ($arg instanceof Twig_Node_Expression_Constant) {
+            return array($arg->getAttribute('value'));
+        }
+
+        return array();
+    }
+
+    return array('html');
+}
+
+if (function_exists('mb_convert_encoding')) {
+    function twig_convert_encoding($string, $to, $from)
+    {
+        return mb_convert_encoding($string, $to, $from);
+    }
+} elseif (function_exists('iconv')) {
+    function twig_convert_encoding($string, $to, $from)
+    {
+        return iconv($from, $to, $string);
+    }
+} else {
+    function twig_convert_encoding($string, $to, $from)
+    {
+        throw new Twig_Error_Runtime('No suitable convert encoding function (use UTF-8 as your encoding or install the iconv or mbstring extension).');
+    }
+}
+
+function _twig_escape_js_callback($matches)
+{
+    $char = $matches[0];
+
+    // \xHH
+    if (!isset($char[1])) {
+        return '\\x'.strtoupper(substr('00'.bin2hex($char), -2));
+    }
+
+    // \uHHHH
+    $char = twig_convert_encoding($char, 'UTF-16BE', 'UTF-8');
+
+    return '\\u'.strtoupper(substr('0000'.bin2hex($char), -4));
+}
+
+function _twig_escape_css_callback($matches)
+{
+    $char = $matches[0];
+
+    // \xHH
+    if (!isset($char[1])) {
+        $hex = ltrim(strtoupper(bin2hex($char)), '0');
+        if (0 === strlen($hex)) {
+            $hex = '0';
+        }
+
+        return '\\'.$hex.' ';
+    }
+
+    // \uHHHH
+    $char = twig_convert_encoding($char, 'UTF-16BE', 'UTF-8');
+
+    return '\\'.ltrim(strtoupper(bin2hex($char)), '0').' ';
+}
+
+/**
+ * This function is adapted from code coming from Zend Framework.
+ *
+ * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+function _twig_escape_html_attr_callback($matches)
+{
+    /*
+     * While HTML supports far more named entities, the lowest common denominator
+     * has become HTML5's XML Serialisation which is restricted to the those named
+     * entities that XML supports. Using HTML entities would result in this error:
+     *     XML Parsing Error: undefined entity
+     */
+    static $entityMap = array(
+        34 => 'quot', /* quotation mark */
+        38 => 'amp',  /* ampersand */
+        60 => 'lt',   /* less-than sign */
+        62 => 'gt',   /* greater-than sign */
+    );
+
+    $chr = $matches[0];
+    $ord = ord($chr);
+
+    /**
+     * The following replaces characters undefined in HTML with the
+     * hex entity for the Unicode replacement character.
+     */
+    if (($ord <= 0x1f && $chr != "\t" && $chr != "\n" && $chr != "\r") || ($ord >= 0x7f && $ord <= 0x9f)) {
+        return '&#xFFFD;';
+    }
+
+    /**
+     * Check if the current character to escape has a name entity we should
+     * replace it with while grabbing the hex value of the character.
+     */
+    if (strlen($chr) == 1) {
+        $hex = strtoupper(substr('00'.bin2hex($chr), -2));
+    } else {
+        $chr = twig_convert_encoding($chr, 'UTF-16BE', 'UTF-8');
+        $hex = strtoupper(substr('0000'.bin2hex($chr), -4));
+    }
+
+    $int = hexdec($hex);
+    if (array_key_exists($int, $entityMap)) {
+        return sprintf('&%s;', $entityMap[$int]);
+    }
+
+    /**
+     * Per OWASP recommendations, we'll use hex entities for any other
+     * characters where a named entity does not exist.
+     */
+
+    return sprintf('&#x%s;', $hex);
+}
+
+// add multibyte extensions if possible
+if (function_exists('mb_get_info')) {
+    /**
+     * Returns the length of a variable.
+     *
+     * @param Twig_Environment $env   A Twig_Environment instance
+     * @param mixed            $thing A variable
+     *
+     * @return integer The length of the value
+     */
+    function twig_length_filter(Twig_Environment $env, $thing)
+    {
+        return is_scalar($thing) ? mb_strlen($thing, $env->getCharset()) : count($thing);
+    }
+
+    /**
+     * Converts a string to uppercase.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The uppercased string
+     */
+    function twig_upper_filter(Twig_Environment $env, $string)
+    {
+        if (null !== ($charset = $env->getCharset())) {
+            return mb_strtoupper($string, $charset);
+        }
+
+        return strtoupper($string);
+    }
+
+    /**
+     * Converts a string to lowercase.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The lowercased string
+     */
+    function twig_lower_filter(Twig_Environment $env, $string)
+    {
+        if (null !== ($charset = $env->getCharset())) {
+            return mb_strtolower($string, $charset);
+        }
+
+        return strtolower($string);
+    }
+
+    /**
+     * Returns a titlecased string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The titlecased string
+     */
+    function twig_title_string_filter(Twig_Environment $env, $string)
+    {
+        if (null !== ($charset = $env->getCharset())) {
+            return mb_convert_case($string, MB_CASE_TITLE, $charset);
+        }
+
+        return ucwords(strtolower($string));
+    }
+
+    /**
+     * Returns a capitalized string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The capitalized string
+     */
+    function twig_capitalize_string_filter(Twig_Environment $env, $string)
+    {
+        if (null !== ($charset = $env->getCharset())) {
+            return mb_strtoupper(mb_substr($string, 0, 1, $charset), $charset).
+                         mb_strtolower(mb_substr($string, 1, mb_strlen($string, $charset), $charset), $charset);
+        }
+
+        return ucfirst(strtolower($string));
+    }
+}
+// and byte fallback
+else {
+    /**
+     * Returns the length of a variable.
+     *
+     * @param Twig_Environment $env   A Twig_Environment instance
+     * @param mixed            $thing A variable
+     *
+     * @return integer The length of the value
+     */
+    function twig_length_filter(Twig_Environment $env, $thing)
+    {
+        return is_scalar($thing) ? strlen($thing) : count($thing);
+    }
+
+    /**
+     * Returns a titlecased string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The titlecased string
+     */
+    function twig_title_string_filter(Twig_Environment $env, $string)
+    {
+        return ucwords(strtolower($string));
+    }
+
+    /**
+     * Returns a capitalized string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The capitalized string
+     */
+    function twig_capitalize_string_filter(Twig_Environment $env, $string)
+    {
+        return ucfirst(strtolower($string));
+    }
+}
+
+/* used internally */
+function twig_ensure_traversable($seq)
+{
+    if ($seq instanceof Traversable || is_array($seq)) {
+        return $seq;
+    }
+
+    return array();
+}
+
+/**
+ * Checks if a variable is empty.
+ *
+ * <pre>
+ * {# evaluates to true if the foo variable is null, false, or the empty string #}
+ * {% if foo is empty %}
+ *     {# ... #}
+ * {% endif %}
+ * </pre>
+ *
+ * @param mixed $value A variable
+ *
+ * @return Boolean true if the value is empty, false otherwise
+ */
+function twig_test_empty($value)
+{
+    if ($value instanceof Countable) {
+        return 0 == count($value);
+    }
+
+    return '' === $value || false === $value || null === $value || array() === $value;
+}
+
+/**
+ * Checks if a variable is traversable.
+ *
+ * <pre>
+ * {# evaluates to true if the foo variable is an array or a traversable object #}
+ * {% if foo is traversable %}
+ *     {# ... #}
+ * {% endif %}
+ * </pre>
+ *
+ * @param mixed $value A variable
+ *
+ * @return Boolean true if the value is traversable
+ */
+function twig_test_iterable($value)
+{
+    return $value instanceof Traversable || is_array($value);
+}
+
+/**
+ * Renders a template.
+ *
+ * @param string  $template       The template to render
+ * @param array   $variables      The variables to pass to the template
+ * @param Boolean $with_context   Whether to pass the current context variables or not
+ * @param Boolean $ignore_missing Whether to ignore missing templates or not
+ * @param Boolean $sandboxed      Whether to sandbox the template or not
+ *
+ * @return string The rendered template
+ */
+function twig_include(Twig_Environment $env, $context, $template, $variables = array(), $withContext = true, $ignoreMissing = false, $sandboxed = false)
+{
+    if ($withContext) {
+        $variables = array_merge($context, $variables);
+    }
+
+    if ($isSandboxed = $sandboxed && $env->hasExtension('sandbox')) {
+        $sandbox = $env->getExtension('sandbox');
+        if (!$alreadySandboxed = $sandbox->isSandboxed()) {
+            $sandbox->enableSandbox();
+        }
+    }
+
+    try {
+        return $env->resolveTemplate($template)->render($variables);
+    } catch (Twig_Error_Loader $e) {
+        if (!$ignoreMissing) {
+            throw $e;
+        }
+    }
+
+    if ($isSandboxed && !$alreadySandboxed) {
+        $sandbox->disableSandbox();
+    }
+}
+
+/**
+ * Provides the ability to get constants from instances as well as class/global constants.
+ *
+ * @param string      $constant The name of the constant
+ * @param null|object $object   The object to get the constant from
+ *
+ * @return string
+ */
+function twig_constant($constant, $object = null)
+{
+    if (null !== $object) {
+        $constant = get_class($object).'::'.$constant;
+    }
+
+    return constant($constant);
+}
+
+/**
+ * Batches item.
+ *
+ * @param array   $items An array of items
+ * @param integer $size  The size of the batch
+ * @param string  $fill  A string to fill missing items
+ *
+ * @return array
+ */
+function twig_array_batch($items, $size, $fill = null)
+{
+    if ($items instanceof Traversable) {
+        $items = iterator_to_array($items, false);
+    }
+
+    $size = ceil($size);
+
+    $result = array_chunk($items, $size, true);
+
+    if (null !== $fill) {
+        $last = count($result) - 1;
+        $result[$last] = array_merge(
+            $result[$last],
+            array_fill(0, $size - count($result[$last]), $fill)
+        );
+    }
+
+    return $result;
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension/Debug.php b/vendor/twig/twig/lib/Twig/Extension/Debug.php
new file mode 100644
index 00000000..e3a85bfe
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension/Debug.php
@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Debug extends Twig_Extension
+{
+    /**
+     * Returns a list of global functions to add to the existing list.
+     *
+     * @return array An array of global functions
+     */
+    public function getFunctions()
+    {
+        // dump is safe if var_dump is overridden by xdebug
+        $isDumpOutputHtmlSafe = extension_loaded('xdebug')
+            // false means that it was not set (and the default is on) or it explicitly enabled
+            && (false === ini_get('xdebug.overload_var_dump') || ini_get('xdebug.overload_var_dump'))
+            // false means that it was not set (and the default is on) or it explicitly enabled
+            // xdebug.overload_var_dump produces HTML only when html_errors is also enabled
+            && (false === ini_get('html_errors') || ini_get('html_errors'))
+            || 'cli' === php_sapi_name()
+        ;
+
+        return array(
+            new Twig_SimpleFunction('dump', 'twig_var_dump', array('is_safe' => $isDumpOutputHtmlSafe ? array('html') : array(), 'needs_context' => true, 'needs_environment' => true)),
+        );
+    }
+
+    /**
+     * Returns the name of the extension.
+     *
+     * @return string The extension name
+     */
+    public function getName()
+    {
+        return 'debug';
+    }
+}
+
+function twig_var_dump(Twig_Environment $env, $context)
+{
+    if (!$env->isDebug()) {
+        return;
+    }
+
+    ob_start();
+
+    $count = func_num_args();
+    if (2 === $count) {
+        $vars = array();
+        foreach ($context as $key => $value) {
+            if (!$value instanceof Twig_Template) {
+                $vars[$key] = $value;
+            }
+        }
+
+        var_dump($vars);
+    } else {
+        for ($i = 2; $i < $count; $i++) {
+            var_dump(func_get_arg($i));
+        }
+    }
+
+    return ob_get_clean();
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension/Escaper.php b/vendor/twig/twig/lib/Twig/Extension/Escaper.php
new file mode 100644
index 00000000..c9a7f68e
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension/Escaper.php
@@ -0,0 +1,107 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Escaper extends Twig_Extension
+{
+    protected $defaultStrategy;
+
+    public function __construct($defaultStrategy = 'html')
+    {
+        $this->setDefaultStrategy($defaultStrategy);
+    }
+
+    /**
+     * Returns the token parser instances to add to the existing list.
+     *
+     * @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
+     */
+    public function getTokenParsers()
+    {
+        return array(new Twig_TokenParser_AutoEscape());
+    }
+
+    /**
+     * Returns the node visitor instances to add to the existing list.
+     *
+     * @return array An array of Twig_NodeVisitorInterface instances
+     */
+    public function getNodeVisitors()
+    {
+        return array(new Twig_NodeVisitor_Escaper());
+    }
+
+    /**
+     * Returns a list of filters to add to the existing list.
+     *
+     * @return array An array of filters
+     */
+    public function getFilters()
+    {
+        return array(
+            new Twig_SimpleFilter('raw', 'twig_raw_filter', array('is_safe' => array('all'))),
+        );
+    }
+
+    /**
+     * Sets the default strategy to use when not defined by the user.
+     *
+     * The strategy can be a valid PHP callback that takes the template
+     * "filename" as an argument and returns the strategy to use.
+     *
+     * @param mixed $defaultStrategy An escaping strategy
+     */
+    public function setDefaultStrategy($defaultStrategy)
+    {
+        // for BC
+        if (true === $defaultStrategy) {
+            $defaultStrategy = 'html';
+        }
+
+        $this->defaultStrategy = $defaultStrategy;
+    }
+
+    /**
+     * Gets the default strategy to use when not defined by the user.
+     *
+     * @param string $filename The template "filename"
+     *
+     * @return string The default strategy to use for the template
+     */
+    public function getDefaultStrategy($filename)
+    {
+        // disable string callables to avoid calling a function named html or js,
+        // or any other upcoming escaping strategy
+        if (!is_string($this->defaultStrategy) && is_callable($this->defaultStrategy)) {
+            return call_user_func($this->defaultStrategy, $filename);
+        }
+
+        return $this->defaultStrategy;
+    }
+
+    /**
+     * Returns the name of the extension.
+     *
+     * @return string The extension name
+     */
+    public function getName()
+    {
+        return 'escaper';
+    }
+}
+
+/**
+ * Marks a variable as being safe.
+ *
+ * @param string $string A PHP variable
+ */
+function twig_raw_filter($string)
+{
+    return $string;
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension/Optimizer.php b/vendor/twig/twig/lib/Twig/Extension/Optimizer.php
new file mode 100644
index 00000000..013fcb62
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension/Optimizer.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Optimizer extends Twig_Extension
+{
+    protected $optimizers;
+
+    public function __construct($optimizers = -1)
+    {
+        $this->optimizers = $optimizers;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNodeVisitors()
+    {
+        return array(new Twig_NodeVisitor_Optimizer($this->optimizers));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'optimizer';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension/Sandbox.php b/vendor/twig/twig/lib/Twig/Extension/Sandbox.php
new file mode 100644
index 00000000..bf76c11a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension/Sandbox.php
@@ -0,0 +1,112 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Sandbox extends Twig_Extension
+{
+    protected $sandboxedGlobally;
+    protected $sandboxed;
+    protected $policy;
+
+    public function __construct(Twig_Sandbox_SecurityPolicyInterface $policy, $sandboxed = false)
+    {
+        $this->policy            = $policy;
+        $this->sandboxedGlobally = $sandboxed;
+    }
+
+    /**
+     * Returns the token parser instances to add to the existing list.
+     *
+     * @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
+     */
+    public function getTokenParsers()
+    {
+        return array(new Twig_TokenParser_Sandbox());
+    }
+
+    /**
+     * Returns the node visitor instances to add to the existing list.
+     *
+     * @return array An array of Twig_NodeVisitorInterface instances
+     */
+    public function getNodeVisitors()
+    {
+        return array(new Twig_NodeVisitor_Sandbox());
+    }
+
+    public function enableSandbox()
+    {
+        $this->sandboxed = true;
+    }
+
+    public function disableSandbox()
+    {
+        $this->sandboxed = false;
+    }
+
+    public function isSandboxed()
+    {
+        return $this->sandboxedGlobally || $this->sandboxed;
+    }
+
+    public function isSandboxedGlobally()
+    {
+        return $this->sandboxedGlobally;
+    }
+
+    public function setSecurityPolicy(Twig_Sandbox_SecurityPolicyInterface $policy)
+    {
+        $this->policy = $policy;
+    }
+
+    public function getSecurityPolicy()
+    {
+        return $this->policy;
+    }
+
+    public function checkSecurity($tags, $filters, $functions)
+    {
+        if ($this->isSandboxed()) {
+            $this->policy->checkSecurity($tags, $filters, $functions);
+        }
+    }
+
+    public function checkMethodAllowed($obj, $method)
+    {
+        if ($this->isSandboxed()) {
+            $this->policy->checkMethodAllowed($obj, $method);
+        }
+    }
+
+    public function checkPropertyAllowed($obj, $method)
+    {
+        if ($this->isSandboxed()) {
+            $this->policy->checkPropertyAllowed($obj, $method);
+        }
+    }
+
+    public function ensureToStringAllowed($obj)
+    {
+        if (is_object($obj)) {
+            $this->policy->checkMethodAllowed($obj, '__toString');
+        }
+
+        return $obj;
+    }
+
+    /**
+     * Returns the name of the extension.
+     *
+     * @return string The extension name
+     */
+    public function getName()
+    {
+        return 'sandbox';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension/Staging.php b/vendor/twig/twig/lib/Twig/Extension/Staging.php
new file mode 100644
index 00000000..8ab0f459
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension/Staging.php
@@ -0,0 +1,113 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Internal class.
+ *
+ * This class is used by Twig_Environment as a staging area and must not be used directly.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Extension_Staging extends Twig_Extension
+{
+    protected $functions = array();
+    protected $filters = array();
+    protected $visitors = array();
+    protected $tokenParsers = array();
+    protected $globals = array();
+    protected $tests = array();
+
+    public function addFunction($name, $function)
+    {
+        $this->functions[$name] = $function;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return $this->functions;
+    }
+
+    public function addFilter($name, $filter)
+    {
+        $this->filters[$name] = $filter;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFilters()
+    {
+        return $this->filters;
+    }
+
+    public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        $this->visitors[] = $visitor;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNodeVisitors()
+    {
+        return $this->visitors;
+    }
+
+    public function addTokenParser(Twig_TokenParserInterface $parser)
+    {
+        $this->tokenParsers[] = $parser;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTokenParsers()
+    {
+        return $this->tokenParsers;
+    }
+
+    public function addGlobal($name, $value)
+    {
+        $this->globals[$name] = $value;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getGlobals()
+    {
+        return $this->globals;
+    }
+
+    public function addTest($name, $test)
+    {
+        $this->tests[$name] = $test;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTests()
+    {
+        return $this->tests;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'staging';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Extension/StringLoader.php b/vendor/twig/twig/lib/Twig/Extension/StringLoader.php
new file mode 100644
index 00000000..20f3f994
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Extension/StringLoader.php
@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_StringLoader extends Twig_Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return array(
+            new Twig_SimpleFunction('template_from_string', 'twig_template_from_string', array('needs_environment' => true)),
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'string_loader';
+    }
+}
+
+/**
+ * Loads a template from a string.
+ *
+ * <pre>
+ * {{ include(template_from_string("Hello {{ name }}")) }}
+ * </pre>
+ *
+ * @param Twig_Environment $env      A Twig_Environment instance
+ * @param string           $template A template as a string
+ *
+ * @return Twig_Template A Twig_Template instance
+ */
+function twig_template_from_string(Twig_Environment $env, $template)
+{
+    static $loader;
+
+    if (null === $loader) {
+        $loader = new Twig_Loader_String();
+    }
+
+    $current = $env->getLoader();
+    $env->setLoader($loader);
+    try {
+        $template = $env->loadTemplate($template);
+    } catch (Exception $e) {
+        $env->setLoader($current);
+
+        throw $e;
+    }
+    $env->setLoader($current);
+
+    return $template;
+}
diff --git a/vendor/twig/twig/lib/Twig/ExtensionInterface.php b/vendor/twig/twig/lib/Twig/ExtensionInterface.php
new file mode 100644
index 00000000..f189e9d9
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/ExtensionInterface.php
@@ -0,0 +1,83 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by extension classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_ExtensionInterface
+{
+    /**
+     * Initializes the runtime environment.
+     *
+     * This is where you can load some file that contains filter functions for instance.
+     *
+     * @param Twig_Environment $environment The current Twig_Environment instance
+     */
+    public function initRuntime(Twig_Environment $environment);
+
+    /**
+     * Returns the token parser instances to add to the existing list.
+     *
+     * @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
+     */
+    public function getTokenParsers();
+
+    /**
+     * Returns the node visitor instances to add to the existing list.
+     *
+     * @return array An array of Twig_NodeVisitorInterface instances
+     */
+    public function getNodeVisitors();
+
+    /**
+     * Returns a list of filters to add to the existing list.
+     *
+     * @return array An array of filters
+     */
+    public function getFilters();
+
+    /**
+     * Returns a list of tests to add to the existing list.
+     *
+     * @return array An array of tests
+     */
+    public function getTests();
+
+    /**
+     * Returns a list of functions to add to the existing list.
+     *
+     * @return array An array of functions
+     */
+    public function getFunctions();
+
+    /**
+     * Returns a list of operators to add to the existing list.
+     *
+     * @return array An array of operators
+     */
+    public function getOperators();
+
+    /**
+     * Returns a list of global variables to add to the existing list.
+     *
+     * @return array An array of global variables
+     */
+    public function getGlobals();
+
+    /**
+     * Returns the name of the extension.
+     *
+     * @return string The extension name
+     */
+    public function getName();
+}
diff --git a/vendor/twig/twig/lib/Twig/Filter.php b/vendor/twig/twig/lib/Twig/Filter.php
new file mode 100644
index 00000000..5cfbb662
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Filter.php
@@ -0,0 +1,81 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+abstract class Twig_Filter implements Twig_FilterInterface, Twig_FilterCallableInterface
+{
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct(array $options = array())
+    {
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context'     => false,
+            'pre_escape'        => null,
+            'preserves_safety'  => null,
+            'callable'          => null,
+        ), $options);
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $filterArgs)
+    {
+        if (isset($this->options['is_safe'])) {
+            return $this->options['is_safe'];
+        }
+
+        if (isset($this->options['is_safe_callback'])) {
+            return call_user_func($this->options['is_safe_callback'], $filterArgs);
+        }
+    }
+
+    public function getPreservesSafety()
+    {
+        return $this->options['preserves_safety'];
+    }
+
+    public function getPreEscape()
+    {
+        return $this->options['pre_escape'];
+    }
+
+    public function getCallable()
+    {
+        return $this->options['callable'];
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Filter/Function.php b/vendor/twig/twig/lib/Twig/Filter/Function.php
new file mode 100644
index 00000000..ad374a55
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Filter/Function.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a function template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Filter_Function extends Twig_Filter
+{
+    protected $function;
+
+    public function __construct($function, array $options = array())
+    {
+        $options['callable'] = $function;
+
+        parent::__construct($options);
+
+        $this->function = $function;
+    }
+
+    public function compile()
+    {
+        return $this->function;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Filter/Method.php b/vendor/twig/twig/lib/Twig/Filter/Method.php
new file mode 100644
index 00000000..63c8c3be
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Filter/Method.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a method template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Filter_Method extends Twig_Filter
+{
+    protected $extension;
+    protected $method;
+
+    public function __construct(Twig_ExtensionInterface $extension, $method, array $options = array())
+    {
+        $options['callable'] = array($extension, $method);
+
+        parent::__construct($options);
+
+        $this->extension = $extension;
+        $this->method = $method;
+    }
+
+    public function compile()
+    {
+        return sprintf('$this->env->getExtension(\'%s\')->%s', $this->extension->getName(), $this->method);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Filter/Node.php b/vendor/twig/twig/lib/Twig/Filter/Node.php
new file mode 100644
index 00000000..8744c5e0
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Filter/Node.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template filter as a node.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Filter_Node extends Twig_Filter
+{
+    protected $class;
+
+    public function __construct($class, array $options = array())
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/FilterCallableInterface.php b/vendor/twig/twig/lib/Twig/FilterCallableInterface.php
new file mode 100644
index 00000000..145534df
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/FilterCallableInterface.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a callable template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FilterCallableInterface
+{
+    public function getCallable();
+}
diff --git a/vendor/twig/twig/lib/Twig/FilterInterface.php b/vendor/twig/twig/lib/Twig/FilterInterface.php
new file mode 100644
index 00000000..5319ecc9
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/FilterInterface.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FilterInterface
+{
+    /**
+     * Compiles a filter.
+     *
+     * @return string The PHP code for the filter
+     */
+    public function compile();
+
+    public function needsEnvironment();
+
+    public function needsContext();
+
+    public function getSafe(Twig_Node $filterArgs);
+
+    public function getPreservesSafety();
+
+    public function getPreEscape();
+
+    public function setArguments($arguments);
+
+    public function getArguments();
+}
diff --git a/vendor/twig/twig/lib/Twig/Function.php b/vendor/twig/twig/lib/Twig/Function.php
new file mode 100644
index 00000000..b5ffb2b0
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Function.php
@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+abstract class Twig_Function implements Twig_FunctionInterface, Twig_FunctionCallableInterface
+{
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct(array $options = array())
+    {
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context'     => false,
+            'callable'          => null,
+        ), $options);
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $functionArgs)
+    {
+        if (isset($this->options['is_safe'])) {
+            return $this->options['is_safe'];
+        }
+
+        if (isset($this->options['is_safe_callback'])) {
+            return call_user_func($this->options['is_safe_callback'], $functionArgs);
+        }
+
+        return array();
+    }
+
+    public function getCallable()
+    {
+        return $this->options['callable'];
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Function/Function.php b/vendor/twig/twig/lib/Twig/Function/Function.php
new file mode 100644
index 00000000..d1e1b96a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Function/Function.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a function template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Function_Function extends Twig_Function
+{
+    protected $function;
+
+    public function __construct($function, array $options = array())
+    {
+        $options['callable'] = $function;
+
+        parent::__construct($options);
+
+        $this->function = $function;
+    }
+
+    public function compile()
+    {
+        return $this->function;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Function/Method.php b/vendor/twig/twig/lib/Twig/Function/Method.php
new file mode 100644
index 00000000..67039a95
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Function/Method.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a method template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Function_Method extends Twig_Function
+{
+    protected $extension;
+    protected $method;
+
+    public function __construct(Twig_ExtensionInterface $extension, $method, array $options = array())
+    {
+        $options['callable'] = array($extension, $method);
+
+        parent::__construct($options);
+
+        $this->extension = $extension;
+        $this->method = $method;
+    }
+
+    public function compile()
+    {
+        return sprintf('$this->env->getExtension(\'%s\')->%s', $this->extension->getName(), $this->method);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Function/Node.php b/vendor/twig/twig/lib/Twig/Function/Node.php
new file mode 100644
index 00000000..06a0d0db
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Function/Node.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template function as a node.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Function_Node extends Twig_Function
+{
+    protected $class;
+
+    public function __construct($class, array $options = array())
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/FunctionCallableInterface.php b/vendor/twig/twig/lib/Twig/FunctionCallableInterface.php
new file mode 100644
index 00000000..0aab4f5e
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/FunctionCallableInterface.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a callable template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FunctionCallableInterface
+{
+    public function getCallable();
+}
diff --git a/vendor/twig/twig/lib/Twig/FunctionInterface.php b/vendor/twig/twig/lib/Twig/FunctionInterface.php
new file mode 100644
index 00000000..67f4f89c
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/FunctionInterface.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FunctionInterface
+{
+    /**
+     * Compiles a function.
+     *
+     * @return string The PHP code for the function
+     */
+    public function compile();
+
+    public function needsEnvironment();
+
+    public function needsContext();
+
+    public function getSafe(Twig_Node $filterArgs);
+
+    public function setArguments($arguments);
+
+    public function getArguments();
+}
diff --git a/vendor/twig/twig/lib/Twig/Lexer.php b/vendor/twig/twig/lib/Twig/Lexer.php
new file mode 100644
index 00000000..000b038e
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Lexer.php
@@ -0,0 +1,408 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Lexes a template string.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Lexer implements Twig_LexerInterface
+{
+    protected $tokens;
+    protected $code;
+    protected $cursor;
+    protected $lineno;
+    protected $end;
+    protected $state;
+    protected $states;
+    protected $brackets;
+    protected $env;
+    protected $filename;
+    protected $options;
+    protected $regexes;
+    protected $position;
+    protected $positions;
+    protected $currentVarBlockLine;
+
+    const STATE_DATA            = 0;
+    const STATE_BLOCK           = 1;
+    const STATE_VAR             = 2;
+    const STATE_STRING          = 3;
+    const STATE_INTERPOLATION   = 4;
+
+    const REGEX_NAME            = '/[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/A';
+    const REGEX_NUMBER          = '/[0-9]+(?:\.[0-9]+)?/A';
+    const REGEX_STRING          = '/"([^#"\\\\]*(?:\\\\.[^#"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/As';
+    const REGEX_DQ_STRING_DELIM = '/"/A';
+    const REGEX_DQ_STRING_PART  = '/[^#"\\\\]*(?:(?:\\\\.|#(?!\{))[^#"\\\\]*)*/As';
+    const PUNCTUATION           = '()[]{}?:.,|';
+
+    public function __construct(Twig_Environment $env, array $options = array())
+    {
+        $this->env = $env;
+
+        $this->options = array_merge(array(
+            'tag_comment'     => array('{#', '#}'),
+            'tag_block'       => array('{%', '%}'),
+            'tag_variable'    => array('{{', '}}'),
+            'whitespace_trim' => '-',
+            'interpolation'   => array('#{', '}'),
+        ), $options);
+
+        $this->regexes = array(
+            'lex_var'             => '/\s*'.preg_quote($this->options['whitespace_trim'].$this->options['tag_variable'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_variable'][1], '/').'/A',
+            'lex_block'           => '/\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')\n?/A',
+            'lex_raw_data'        => '/('.preg_quote($this->options['tag_block'][0].$this->options['whitespace_trim'], '/').'|'.preg_quote($this->options['tag_block'][0], '/').')\s*(?:end%s)\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')/s',
+            'operator'            => $this->getOperatorRegex(),
+            'lex_comment'         => '/(?:'.preg_quote($this->options['whitespace_trim'], '/').preg_quote($this->options['tag_comment'][1], '/').'\s*|'.preg_quote($this->options['tag_comment'][1], '/').')\n?/s',
+            'lex_block_raw'       => '/\s*(raw|verbatim)\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')/As',
+            'lex_block_line'      => '/\s*line\s+(\d+)\s*'.preg_quote($this->options['tag_block'][1], '/').'/As',
+            'lex_tokens_start'    => '/('.preg_quote($this->options['tag_variable'][0], '/').'|'.preg_quote($this->options['tag_block'][0], '/').'|'.preg_quote($this->options['tag_comment'][0], '/').')('.preg_quote($this->options['whitespace_trim'], '/').')?/s',
+            'interpolation_start' => '/'.preg_quote($this->options['interpolation'][0], '/').'\s*/A',
+            'interpolation_end'   => '/\s*'.preg_quote($this->options['interpolation'][1], '/').'/A',
+        );
+    }
+
+    /**
+     * Tokenizes a source code.
+     *
+     * @param string $code     The source code
+     * @param string $filename A unique identifier for the source code
+     *
+     * @return Twig_TokenStream A token stream instance
+     */
+    public function tokenize($code, $filename = null)
+    {
+        if (function_exists('mb_internal_encoding') && ((int) ini_get('mbstring.func_overload')) & 2) {
+            $mbEncoding = mb_internal_encoding();
+            mb_internal_encoding('ASCII');
+        }
+
+        $this->code = str_replace(array("\r\n", "\r"), "\n", $code);
+        $this->filename = $filename;
+        $this->cursor = 0;
+        $this->lineno = 1;
+        $this->end = strlen($this->code);
+        $this->tokens = array();
+        $this->state = self::STATE_DATA;
+        $this->states = array();
+        $this->brackets = array();
+        $this->position = -1;
+
+        // find all token starts in one go
+        preg_match_all($this->regexes['lex_tokens_start'], $this->code, $matches, PREG_OFFSET_CAPTURE);
+        $this->positions = $matches;
+
+        while ($this->cursor < $this->end) {
+            // dispatch to the lexing functions depending
+            // on the current state
+            switch ($this->state) {
+                case self::STATE_DATA:
+                    $this->lexData();
+                    break;
+
+                case self::STATE_BLOCK:
+                    $this->lexBlock();
+                    break;
+
+                case self::STATE_VAR:
+                    $this->lexVar();
+                    break;
+
+                case self::STATE_STRING:
+                    $this->lexString();
+                    break;
+
+                case self::STATE_INTERPOLATION:
+                    $this->lexInterpolation();
+                    break;
+            }
+        }
+
+        $this->pushToken(Twig_Token::EOF_TYPE);
+
+        if (!empty($this->brackets)) {
+            list($expect, $lineno) = array_pop($this->brackets);
+            throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $expect), $lineno, $this->filename);
+        }
+
+        if (isset($mbEncoding)) {
+            mb_internal_encoding($mbEncoding);
+        }
+
+        return new Twig_TokenStream($this->tokens, $this->filename);
+    }
+
+    protected function lexData()
+    {
+        // if no matches are left we return the rest of the template as simple text token
+        if ($this->position == count($this->positions[0]) - 1) {
+            $this->pushToken(Twig_Token::TEXT_TYPE, substr($this->code, $this->cursor));
+            $this->cursor = $this->end;
+
+            return;
+        }
+
+        // Find the first token after the current cursor
+        $position = $this->positions[0][++$this->position];
+        while ($position[1] < $this->cursor) {
+            if ($this->position == count($this->positions[0]) - 1) {
+                return;
+            }
+            $position = $this->positions[0][++$this->position];
+        }
+
+        // push the template text first
+        $text = $textContent = substr($this->code, $this->cursor, $position[1] - $this->cursor);
+        if (isset($this->positions[2][$this->position][0])) {
+            $text = rtrim($text);
+        }
+        $this->pushToken(Twig_Token::TEXT_TYPE, $text);
+        $this->moveCursor($textContent.$position[0]);
+
+        switch ($this->positions[1][$this->position][0]) {
+            case $this->options['tag_comment'][0]:
+                $this->lexComment();
+                break;
+
+            case $this->options['tag_block'][0]:
+                // raw data?
+                if (preg_match($this->regexes['lex_block_raw'], $this->code, $match, null, $this->cursor)) {
+                    $this->moveCursor($match[0]);
+                    $this->lexRawData($match[1]);
+                // {% line \d+ %}
+                } elseif (preg_match($this->regexes['lex_block_line'], $this->code, $match, null, $this->cursor)) {
+                    $this->moveCursor($match[0]);
+                    $this->lineno = (int) $match[1];
+                } else {
+                    $this->pushToken(Twig_Token::BLOCK_START_TYPE);
+                    $this->pushState(self::STATE_BLOCK);
+                    $this->currentVarBlockLine = $this->lineno;
+                }
+                break;
+
+            case $this->options['tag_variable'][0]:
+                $this->pushToken(Twig_Token::VAR_START_TYPE);
+                $this->pushState(self::STATE_VAR);
+                $this->currentVarBlockLine = $this->lineno;
+                break;
+        }
+    }
+
+    protected function lexBlock()
+    {
+        if (empty($this->brackets) && preg_match($this->regexes['lex_block'], $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::BLOCK_END_TYPE);
+            $this->moveCursor($match[0]);
+            $this->popState();
+        } else {
+            $this->lexExpression();
+        }
+    }
+
+    protected function lexVar()
+    {
+        if (empty($this->brackets) && preg_match($this->regexes['lex_var'], $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::VAR_END_TYPE);
+            $this->moveCursor($match[0]);
+            $this->popState();
+        } else {
+            $this->lexExpression();
+        }
+    }
+
+    protected function lexExpression()
+    {
+        // whitespace
+        if (preg_match('/\s+/A', $this->code, $match, null, $this->cursor)) {
+            $this->moveCursor($match[0]);
+
+            if ($this->cursor >= $this->end) {
+                throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $this->state === self::STATE_BLOCK ? 'block' : 'variable'), $this->currentVarBlockLine, $this->filename);
+            }
+        }
+
+        // operators
+        if (preg_match($this->regexes['operator'], $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::OPERATOR_TYPE, $match[0]);
+            $this->moveCursor($match[0]);
+        }
+        // names
+        elseif (preg_match(self::REGEX_NAME, $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::NAME_TYPE, $match[0]);
+            $this->moveCursor($match[0]);
+        }
+        // numbers
+        elseif (preg_match(self::REGEX_NUMBER, $this->code, $match, null, $this->cursor)) {
+            $number = (float) $match[0];  // floats
+            if (ctype_digit($match[0]) && $number <= PHP_INT_MAX) {
+                $number = (int) $match[0]; // integers lower than the maximum
+            }
+            $this->pushToken(Twig_Token::NUMBER_TYPE, $number);
+            $this->moveCursor($match[0]);
+        }
+        // punctuation
+        elseif (false !== strpos(self::PUNCTUATION, $this->code[$this->cursor])) {
+            // opening bracket
+            if (false !== strpos('([{', $this->code[$this->cursor])) {
+                $this->brackets[] = array($this->code[$this->cursor], $this->lineno);
+            }
+            // closing bracket
+            elseif (false !== strpos(')]}', $this->code[$this->cursor])) {
+                if (empty($this->brackets)) {
+                    throw new Twig_Error_Syntax(sprintf('Unexpected "%s"', $this->code[$this->cursor]), $this->lineno, $this->filename);
+                }
+
+                list($expect, $lineno) = array_pop($this->brackets);
+                if ($this->code[$this->cursor] != strtr($expect, '([{', ')]}')) {
+                    throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $expect), $lineno, $this->filename);
+                }
+            }
+
+            $this->pushToken(Twig_Token::PUNCTUATION_TYPE, $this->code[$this->cursor]);
+            ++$this->cursor;
+        }
+        // strings
+        elseif (preg_match(self::REGEX_STRING, $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::STRING_TYPE, stripcslashes(substr($match[0], 1, -1)));
+            $this->moveCursor($match[0]);
+        }
+        // opening double quoted string
+        elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, null, $this->cursor)) {
+            $this->brackets[] = array('"', $this->lineno);
+            $this->pushState(self::STATE_STRING);
+            $this->moveCursor($match[0]);
+        }
+        // unlexable
+        else {
+            throw new Twig_Error_Syntax(sprintf('Unexpected character "%s"', $this->code[$this->cursor]), $this->lineno, $this->filename);
+        }
+    }
+
+    protected function lexRawData($tag)
+    {
+        if (!preg_match(str_replace('%s', $tag, $this->regexes['lex_raw_data']), $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) {
+            throw new Twig_Error_Syntax(sprintf('Unexpected end of file: Unclosed "%s" block', $tag), $this->lineno, $this->filename);
+        }
+
+        $text = substr($this->code, $this->cursor, $match[0][1] - $this->cursor);
+        $this->moveCursor($text.$match[0][0]);
+
+        if (false !== strpos($match[1][0], $this->options['whitespace_trim'])) {
+            $text = rtrim($text);
+        }
+
+        $this->pushToken(Twig_Token::TEXT_TYPE, $text);
+    }
+
+    protected function lexComment()
+    {
+        if (!preg_match($this->regexes['lex_comment'], $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) {
+            throw new Twig_Error_Syntax('Unclosed comment', $this->lineno, $this->filename);
+        }
+
+        $this->moveCursor(substr($this->code, $this->cursor, $match[0][1] - $this->cursor).$match[0][0]);
+    }
+
+    protected function lexString()
+    {
+        if (preg_match($this->regexes['interpolation_start'], $this->code, $match, null, $this->cursor)) {
+            $this->brackets[] = array($this->options['interpolation'][0], $this->lineno);
+            $this->pushToken(Twig_Token::INTERPOLATION_START_TYPE);
+            $this->moveCursor($match[0]);
+            $this->pushState(self::STATE_INTERPOLATION);
+
+        } elseif (preg_match(self::REGEX_DQ_STRING_PART, $this->code, $match, null, $this->cursor) && strlen($match[0]) > 0) {
+            $this->pushToken(Twig_Token::STRING_TYPE, stripcslashes($match[0]));
+            $this->moveCursor($match[0]);
+
+        } elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, null, $this->cursor)) {
+
+            list($expect, $lineno) = array_pop($this->brackets);
+            if ($this->code[$this->cursor] != '"') {
+                throw new Twig_Error_Syntax(sprintf('Unclosed "%s"', $expect), $lineno, $this->filename);
+            }
+
+            $this->popState();
+            ++$this->cursor;
+        }
+    }
+
+    protected function lexInterpolation()
+    {
+        $bracket = end($this->brackets);
+        if ($this->options['interpolation'][0] === $bracket[0] && preg_match($this->regexes['interpolation_end'], $this->code, $match, null, $this->cursor)) {
+            array_pop($this->brackets);
+            $this->pushToken(Twig_Token::INTERPOLATION_END_TYPE);
+            $this->moveCursor($match[0]);
+            $this->popState();
+        } else {
+            $this->lexExpression();
+        }
+    }
+
+    protected function pushToken($type, $value = '')
+    {
+        // do not push empty text tokens
+        if (Twig_Token::TEXT_TYPE === $type && '' === $value) {
+            return;
+        }
+
+        $this->tokens[] = new Twig_Token($type, $value, $this->lineno);
+    }
+
+    protected function moveCursor($text)
+    {
+        $this->cursor += strlen($text);
+        $this->lineno += substr_count($text, "\n");
+    }
+
+    protected function getOperatorRegex()
+    {
+        $operators = array_merge(
+            array('='),
+            array_keys($this->env->getUnaryOperators()),
+            array_keys($this->env->getBinaryOperators())
+        );
+
+        $operators = array_combine($operators, array_map('strlen', $operators));
+        arsort($operators);
+
+        $regex = array();
+        foreach ($operators as $operator => $length) {
+            // an operator that ends with a character must be followed by
+            // a whitespace or a parenthesis
+            if (ctype_alpha($operator[$length - 1])) {
+                $regex[] = preg_quote($operator, '/').'(?=[\s()])';
+            } else {
+                $regex[] = preg_quote($operator, '/');
+            }
+        }
+
+        return '/'.implode('|', $regex).'/A';
+    }
+
+    protected function pushState($state)
+    {
+        $this->states[] = $this->state;
+        $this->state = $state;
+    }
+
+    protected function popState()
+    {
+        if (0 === count($this->states)) {
+            throw new Exception('Cannot pop state without a previous state');
+        }
+
+        $this->state = array_pop($this->states);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/LexerInterface.php b/vendor/twig/twig/lib/Twig/LexerInterface.php
new file mode 100644
index 00000000..4b83f81b
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/LexerInterface.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by lexer classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_LexerInterface
+{
+    /**
+     * Tokenizes a source code.
+     *
+     * @param string $code     The source code
+     * @param string $filename A unique identifier for the source code
+     *
+     * @return Twig_TokenStream A token stream instance
+     */
+    public function tokenize($code, $filename = null);
+}
diff --git a/vendor/twig/twig/lib/Twig/Loader/Array.php b/vendor/twig/twig/lib/Twig/Loader/Array.php
new file mode 100644
index 00000000..89087aea
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Loader/Array.php
@@ -0,0 +1,98 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads a template from an array.
+ *
+ * When using this loader with a cache mechanism, you should know that a new cache
+ * key is generated each time a template content "changes" (the cache key being the
+ * source code of the template). If you don't want to see your cache grows out of
+ * control, you need to take care of clearing the old cache file by yourself.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_Array implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    protected $templates;
+
+    /**
+     * Constructor.
+     *
+     * @param array $templates An array of templates (keys are the names, and values are the source code)
+     *
+     * @see Twig_Loader
+     */
+    public function __construct(array $templates)
+    {
+        $this->templates = array();
+        foreach ($templates as $name => $template) {
+            $this->templates[$name] = $template;
+        }
+    }
+
+    /**
+     * Adds or overrides a template.
+     *
+     * @param string $name     The template name
+     * @param string $template The template source
+     */
+    public function setTemplate($name, $template)
+    {
+        $this->templates[(string) $name] = $template;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        $name = (string) $name;
+        if (!isset($this->templates[$name])) {
+            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        return isset($this->templates[(string) $name]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        $name = (string) $name;
+        if (!isset($this->templates[$name])) {
+            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        $name = (string) $name;
+        if (!isset($this->templates[$name])) {
+            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
+        }
+
+        return true;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Loader/Chain.php b/vendor/twig/twig/lib/Twig/Loader/Chain.php
new file mode 100644
index 00000000..1f1cf065
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Loader/Chain.php
@@ -0,0 +1,139 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads templates from other loaders.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_Chain implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    private $hasSourceCache = array();
+    protected $loaders;
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_LoaderInterface[] $loaders An array of loader instances
+     */
+    public function __construct(array $loaders = array())
+    {
+        $this->loaders = array();
+        foreach ($loaders as $loader) {
+            $this->addLoader($loader);
+        }
+    }
+
+    /**
+     * Adds a loader instance.
+     *
+     * @param Twig_LoaderInterface $loader A Loader instance
+     */
+    public function addLoader(Twig_LoaderInterface $loader)
+    {
+        $this->loaders[] = $loader;
+        $this->hasSourceCache = array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        $exceptions = array();
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface && !$loader->exists($name)) {
+                continue;
+            }
+
+            try {
+                return $loader->getSource($name);
+            } catch (Twig_Error_Loader $e) {
+                $exceptions[] = $e->getMessage();
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Template "%s" is not defined (%s).', $name, implode(', ', $exceptions)));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        $name = (string) $name;
+
+        if (isset($this->hasSourceCache[$name])) {
+            return $this->hasSourceCache[$name];
+        }
+
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface) {
+                if ($loader->exists($name)) {
+                    return $this->hasSourceCache[$name] = true;
+                }
+
+                continue;
+            }
+
+            try {
+                $loader->getSource($name);
+
+                return $this->hasSourceCache[$name] = true;
+            } catch (Twig_Error_Loader $e) {
+            }
+        }
+
+        return $this->hasSourceCache[$name] = false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        $exceptions = array();
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface && !$loader->exists($name)) {
+                continue;
+            }
+
+            try {
+                return $loader->getCacheKey($name);
+            } catch (Twig_Error_Loader $e) {
+                $exceptions[] = get_class($loader).': '.$e->getMessage();
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Template "%s" is not defined (%s).', $name, implode(' ', $exceptions)));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        $exceptions = array();
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface && !$loader->exists($name)) {
+                continue;
+            }
+
+            try {
+                return $loader->isFresh($name, $time);
+            } catch (Twig_Error_Loader $e) {
+                $exceptions[] = get_class($loader).': '.$e->getMessage();
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Template "%s" is not defined (%s).', $name, implode(' ', $exceptions)));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Loader/Filesystem.php b/vendor/twig/twig/lib/Twig/Loader/Filesystem.php
new file mode 100644
index 00000000..d47781ab
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Loader/Filesystem.php
@@ -0,0 +1,226 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads template from the filesystem.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_Filesystem implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    /** Identifier of the main namespace. */
+    const MAIN_NAMESPACE = '__main__';
+
+    protected $paths;
+    protected $cache;
+
+    /**
+     * Constructor.
+     *
+     * @param string|array $paths A path or an array of paths where to look for templates
+     */
+    public function __construct($paths = array())
+    {
+        if ($paths) {
+            $this->setPaths($paths);
+        }
+    }
+
+    /**
+     * Returns the paths to the templates.
+     *
+     * @param string $namespace A path namespace
+     *
+     * @return array The array of paths where to look for templates
+     */
+    public function getPaths($namespace = self::MAIN_NAMESPACE)
+    {
+        return isset($this->paths[$namespace]) ? $this->paths[$namespace] : array();
+    }
+
+    /**
+     * Returns the path namespaces.
+     *
+     * The main namespace is always defined.
+     *
+     * @return array The array of defined namespaces
+     */
+    public function getNamespaces()
+    {
+        return array_keys($this->paths);
+    }
+
+    /**
+     * Sets the paths where templates are stored.
+     *
+     * @param string|array $paths     A path or an array of paths where to look for templates
+     * @param string       $namespace A path namespace
+     */
+    public function setPaths($paths, $namespace = self::MAIN_NAMESPACE)
+    {
+        if (!is_array($paths)) {
+            $paths = array($paths);
+        }
+
+        $this->paths[$namespace] = array();
+        foreach ($paths as $path) {
+            $this->addPath($path, $namespace);
+        }
+    }
+
+    /**
+     * Adds a path where templates are stored.
+     *
+     * @param string $path      A path where to look for templates
+     * @param string $namespace A path name
+     *
+     * @throws Twig_Error_Loader
+     */
+    public function addPath($path, $namespace = self::MAIN_NAMESPACE)
+    {
+        // invalidate the cache
+        $this->cache = array();
+
+        if (!is_dir($path)) {
+            throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
+        }
+
+        $this->paths[$namespace][] = rtrim($path, '/\\');
+    }
+
+    /**
+     * Prepends a path where templates are stored.
+     *
+     * @param string $path      A path where to look for templates
+     * @param string $namespace A path name
+     *
+     * @throws Twig_Error_Loader
+     */
+    public function prependPath($path, $namespace = self::MAIN_NAMESPACE)
+    {
+        // invalidate the cache
+        $this->cache = array();
+
+        if (!is_dir($path)) {
+            throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
+        }
+
+        $path = rtrim($path, '/\\');
+
+        if (!isset($this->paths[$namespace])) {
+            $this->paths[$namespace][] = $path;
+        } else {
+            array_unshift($this->paths[$namespace], $path);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        return file_get_contents($this->findTemplate($name));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        return $this->findTemplate($name);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        $name = (string) $name;
+        if (isset($this->cache[$name])) {
+            return true;
+        }
+
+        try {
+            $this->findTemplate($name);
+
+            return true;
+        } catch (Twig_Error_Loader $exception) {
+            return false;
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        return filemtime($this->findTemplate($name)) <= $time;
+    }
+
+    protected function findTemplate($name)
+    {
+        $name = (string) $name;
+
+        // normalize name
+        $name = preg_replace('#/{2,}#', '/', strtr($name, '\\', '/'));
+
+        if (isset($this->cache[$name])) {
+            return $this->cache[$name];
+        }
+
+        $this->validateName($name);
+
+        $namespace = self::MAIN_NAMESPACE;
+        if (isset($name[0]) && '@' == $name[0]) {
+            if (false === $pos = strpos($name, '/')) {
+                throw new Twig_Error_Loader(sprintf('Malformed namespaced template name "%s" (expecting "@namespace/template_name").', $name));
+            }
+
+            $namespace = substr($name, 1, $pos - 1);
+
+            $name = substr($name, $pos + 1);
+        }
+
+        if (!isset($this->paths[$namespace])) {
+            throw new Twig_Error_Loader(sprintf('There are no registered paths for namespace "%s".', $namespace));
+        }
+
+        foreach ($this->paths[$namespace] as $path) {
+            if (is_file($path.'/'.$name)) {
+                return $this->cache[$name] = $path.'/'.$name;
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Unable to find template "%s" (looked into: %s).', $name, implode(', ', $this->paths[$namespace])));
+    }
+
+    protected function validateName($name)
+    {
+        if (false !== strpos($name, "\0")) {
+            throw new Twig_Error_Loader('A template name cannot contain NUL bytes.');
+        }
+
+        $name = ltrim($name, '/');
+        $parts = explode('/', $name);
+        $level = 0;
+        foreach ($parts as $part) {
+            if ('..' === $part) {
+                --$level;
+            } elseif ('.' !== $part) {
+                ++$level;
+            }
+
+            if ($level < 0) {
+                throw new Twig_Error_Loader(sprintf('Looks like you try to load a template outside configured directories (%s).', $name));
+            }
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Loader/String.php b/vendor/twig/twig/lib/Twig/Loader/String.php
new file mode 100644
index 00000000..8ad9856c
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Loader/String.php
@@ -0,0 +1,59 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads a template from a string.
+ *
+ * This loader should only be used for unit testing as it has many limitations
+ * (for instance, the include or extends tag does not make any sense for a string
+ * loader).
+ *
+ * When using this loader with a cache mechanism, you should know that a new cache
+ * key is generated each time a template content "changes" (the cache key being the
+ * source code of the template). If you don't want to see your cache grows out of
+ * control, you need to take care of clearing the old cache file by yourself.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_String implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        return $name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        return $name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        return true;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/LoaderInterface.php b/vendor/twig/twig/lib/Twig/LoaderInterface.php
new file mode 100644
index 00000000..927786d1
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/LoaderInterface.php
@@ -0,0 +1,52 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface all loaders must implement.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_LoaderInterface
+{
+    /**
+     * Gets the source code of a template, given its name.
+     *
+     * @param string $name The name of the template to load
+     *
+     * @return string The template source code
+     *
+     * @throws Twig_Error_Loader When $name is not found
+     */
+    public function getSource($name);
+
+    /**
+     * Gets the cache key to use for the cache for a given template name.
+     *
+     * @param string $name The name of the template to load
+     *
+     * @return string The cache key
+     *
+     * @throws Twig_Error_Loader When $name is not found
+     */
+    public function getCacheKey($name);
+
+    /**
+     * Returns true if the template is still fresh.
+     *
+     * @param string    $name The template name
+     * @param timestamp $time The last modification time of the cached template
+     *
+     * @return Boolean true if the template is fresh, false otherwise
+     *
+     * @throws Twig_Error_Loader When $name is not found
+     */
+    public function isFresh($name, $time);
+}
diff --git a/vendor/twig/twig/lib/Twig/Markup.php b/vendor/twig/twig/lib/Twig/Markup.php
new file mode 100644
index 00000000..69871fcb
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Markup.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a content as safe.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Markup implements Countable
+{
+    protected $content;
+    protected $charset;
+
+    public function __construct($content, $charset)
+    {
+        $this->content = (string) $content;
+        $this->charset = $charset;
+    }
+
+    public function __toString()
+    {
+        return $this->content;
+    }
+
+    public function count()
+    {
+        return function_exists('mb_get_info') ? mb_strlen($this->content, $this->charset) : strlen($this->content);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node.php b/vendor/twig/twig/lib/Twig/Node.php
new file mode 100644
index 00000000..931b4635
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node.php
@@ -0,0 +1,226 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node implements Twig_NodeInterface
+{
+    protected $nodes;
+    protected $attributes;
+    protected $lineno;
+    protected $tag;
+
+    /**
+     * Constructor.
+     *
+     * The nodes are automatically made available as properties ($this->node).
+     * The attributes are automatically made available as array items ($this['name']).
+     *
+     * @param array   $nodes      An array of named nodes
+     * @param array   $attributes An array of attributes (should not be nodes)
+     * @param integer $lineno     The line number
+     * @param string  $tag        The tag name associated with the Node
+     */
+    public function __construct(array $nodes = array(), array $attributes = array(), $lineno = 0, $tag = null)
+    {
+        $this->nodes = $nodes;
+        $this->attributes = $attributes;
+        $this->lineno = $lineno;
+        $this->tag = $tag;
+    }
+
+    public function __toString()
+    {
+        $attributes = array();
+        foreach ($this->attributes as $name => $value) {
+            $attributes[] = sprintf('%s: %s', $name, str_replace("\n", '', var_export($value, true)));
+        }
+
+        $repr = array(get_class($this).'('.implode(', ', $attributes));
+
+        if (count($this->nodes)) {
+            foreach ($this->nodes as $name => $node) {
+                $len = strlen($name) + 4;
+                $noderepr = array();
+                foreach (explode("\n", (string) $node) as $line) {
+                    $noderepr[] = str_repeat(' ', $len).$line;
+                }
+
+                $repr[] = sprintf('  %s: %s', $name, ltrim(implode("\n", $noderepr)));
+            }
+
+            $repr[] = ')';
+        } else {
+            $repr[0] .= ')';
+        }
+
+        return implode("\n", $repr);
+    }
+
+    public function toXml($asDom = false)
+    {
+        $dom = new DOMDocument('1.0', 'UTF-8');
+        $dom->formatOutput = true;
+        $dom->appendChild($xml = $dom->createElement('twig'));
+
+        $xml->appendChild($node = $dom->createElement('node'));
+        $node->setAttribute('class', get_class($this));
+
+        foreach ($this->attributes as $name => $value) {
+            $node->appendChild($attribute = $dom->createElement('attribute'));
+            $attribute->setAttribute('name', $name);
+            $attribute->appendChild($dom->createTextNode($value));
+        }
+
+        foreach ($this->nodes as $name => $n) {
+            if (null === $n) {
+                continue;
+            }
+
+            $child = $n->toXml(true)->getElementsByTagName('node')->item(0);
+            $child = $dom->importNode($child, true);
+            $child->setAttribute('name', $name);
+
+            $node->appendChild($child);
+        }
+
+        return $asDom ? $dom : $dom->saveXml();
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        foreach ($this->nodes as $node) {
+            $node->compile($compiler);
+        }
+    }
+
+    public function getLine()
+    {
+        return $this->lineno;
+    }
+
+    public function getNodeTag()
+    {
+        return $this->tag;
+    }
+
+    /**
+     * Returns true if the attribute is defined.
+     *
+     * @param  string  The attribute name
+     *
+     * @return Boolean true if the attribute is defined, false otherwise
+     */
+    public function hasAttribute($name)
+    {
+        return array_key_exists($name, $this->attributes);
+    }
+
+    /**
+     * Gets an attribute.
+     *
+     * @param  string The attribute name
+     *
+     * @return mixed The attribute value
+     */
+    public function getAttribute($name)
+    {
+        if (!array_key_exists($name, $this->attributes)) {
+            throw new LogicException(sprintf('Attribute "%s" does not exist for Node "%s".', $name, get_class($this)));
+        }
+
+        return $this->attributes[$name];
+    }
+
+    /**
+     * Sets an attribute.
+     *
+     * @param string The attribute name
+     * @param mixed  The attribute value
+     */
+    public function setAttribute($name, $value)
+    {
+        $this->attributes[$name] = $value;
+    }
+
+    /**
+     * Removes an attribute.
+     *
+     * @param string The attribute name
+     */
+    public function removeAttribute($name)
+    {
+        unset($this->attributes[$name]);
+    }
+
+    /**
+     * Returns true if the node with the given identifier exists.
+     *
+     * @param  string  The node name
+     *
+     * @return Boolean true if the node with the given name exists, false otherwise
+     */
+    public function hasNode($name)
+    {
+        return array_key_exists($name, $this->nodes);
+    }
+
+    /**
+     * Gets a node by name.
+     *
+     * @param  string The node name
+     *
+     * @return Twig_Node A Twig_Node instance
+     */
+    public function getNode($name)
+    {
+        if (!array_key_exists($name, $this->nodes)) {
+            throw new LogicException(sprintf('Node "%s" does not exist for Node "%s".', $name, get_class($this)));
+        }
+
+        return $this->nodes[$name];
+    }
+
+    /**
+     * Sets a node.
+     *
+     * @param string    The node name
+     * @param Twig_Node A Twig_Node instance
+     */
+    public function setNode($name, $node = null)
+    {
+        $this->nodes[$name] = $node;
+    }
+
+    /**
+     * Removes a node by name.
+     *
+     * @param string The node name
+     */
+    public function removeNode($name)
+    {
+        unset($this->nodes[$name]);
+    }
+
+    public function count()
+    {
+        return count($this->nodes);
+    }
+
+    public function getIterator()
+    {
+        return new ArrayIterator($this->nodes);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/AutoEscape.php b/vendor/twig/twig/lib/Twig/Node/AutoEscape.php
new file mode 100644
index 00000000..8f190e0b
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/AutoEscape.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an autoescape node.
+ *
+ * The value is the escaping strategy (can be html, js, ...)
+ *
+ * The true value is equivalent to html.
+ *
+ * If autoescaping is disabled, then the value is false.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_AutoEscape extends Twig_Node
+{
+    public function __construct($value, Twig_NodeInterface $body, $lineno, $tag = 'autoescape')
+    {
+        parent::__construct(array('body' => $body), array('value' => $value), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('body'));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Block.php b/vendor/twig/twig/lib/Twig/Node/Block.php
new file mode 100644
index 00000000..50eb67ed
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Block.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a block node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Block extends Twig_Node
+{
+    public function __construct($name, Twig_NodeInterface $body, $lineno, $tag = null)
+    {
+        parent::__construct(array('body' => $body), array('name' => $name), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write(sprintf("public function block_%s(\$context, array \$blocks = array())\n", $this->getAttribute('name')), "{\n")
+            ->indent()
+        ;
+
+        $compiler
+            ->subcompile($this->getNode('body'))
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/BlockReference.php b/vendor/twig/twig/lib/Twig/Node/BlockReference.php
new file mode 100644
index 00000000..013e369e
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/BlockReference.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a block call node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_BlockReference extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct($name, $lineno, $tag = null)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write(sprintf("\$this->displayBlock('%s', \$context, \$blocks);\n", $this->getAttribute('name')))
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Body.php b/vendor/twig/twig/lib/Twig/Node/Body.php
new file mode 100644
index 00000000..3ffb1342
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Body.php
@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a body node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Body extends Twig_Node
+{
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Do.php b/vendor/twig/twig/lib/Twig/Node/Do.php
new file mode 100644
index 00000000..c528066b
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Do.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a do node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Do extends Twig_Node
+{
+    public function __construct(Twig_Node_Expression $expr, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr), array(), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('')
+            ->subcompile($this->getNode('expr'))
+            ->raw(";\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Embed.php b/vendor/twig/twig/lib/Twig/Node/Embed.php
new file mode 100644
index 00000000..4c9456dc
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Embed.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an embed node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Embed extends Twig_Node_Include
+{
+    // we don't inject the module to avoid node visitors to traverse it twice (as it will be already visited in the main module)
+    public function __construct($filename, $index, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
+    {
+        parent::__construct(new Twig_Node_Expression_Constant('not_used', $lineno), $variables, $only, $ignoreMissing, $lineno, $tag);
+
+        $this->setAttribute('filename', $filename);
+        $this->setAttribute('index', $index);
+    }
+
+    protected function addGetTemplate(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("\$this->env->loadTemplate(")
+            ->string($this->getAttribute('filename'))
+            ->raw(', ')
+            ->string($this->getAttribute('index'))
+            ->raw(")")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression.php b/vendor/twig/twig/lib/Twig/Node/Expression.php
new file mode 100644
index 00000000..a7382e7d
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression.php
@@ -0,0 +1,20 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Abstract class for all nodes that represents an expression.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Twig_Node_Expression extends Twig_Node
+{
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Array.php b/vendor/twig/twig/lib/Twig/Node/Expression/Array.php
new file mode 100644
index 00000000..1da785fe
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Array.php
@@ -0,0 +1,86 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Array extends Twig_Node_Expression
+{
+    protected $index;
+
+    public function __construct(array $elements, $lineno)
+    {
+        parent::__construct($elements, array(), $lineno);
+
+        $this->index = -1;
+        foreach ($this->getKeyValuePairs() as $pair) {
+            if ($pair['key'] instanceof Twig_Node_Expression_Constant && ctype_digit((string) $pair['key']->getAttribute('value')) && $pair['key']->getAttribute('value') > $this->index) {
+                $this->index = $pair['key']->getAttribute('value');
+            }
+        }
+    }
+
+    public function getKeyValuePairs()
+    {
+        $pairs = array();
+
+        foreach (array_chunk($this->nodes, 2) as $pair) {
+            $pairs[] = array(
+                'key' => $pair[0],
+                'value' => $pair[1],
+            );
+        }
+
+        return $pairs;
+    }
+
+    public function hasElement(Twig_Node_Expression $key)
+    {
+        foreach ($this->getKeyValuePairs() as $pair) {
+            // we compare the string representation of the keys
+            // to avoid comparing the line numbers which are not relevant here.
+            if ((string) $key == (string) $pair['key']) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function addElement(Twig_Node_Expression $value, Twig_Node_Expression $key = null)
+    {
+        if (null === $key) {
+            $key = new Twig_Node_Expression_Constant(++$this->index, $value->getLine());
+        }
+
+        array_push($this->nodes, $key, $value);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw('array(');
+        $first = true;
+        foreach ($this->getKeyValuePairs() as $pair) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $first = false;
+
+            $compiler
+                ->subcompile($pair['key'])
+                ->raw(' => ')
+                ->subcompile($pair['value'])
+            ;
+        }
+        $compiler->raw(')');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/AssignName.php b/vendor/twig/twig/lib/Twig/Node/Expression/AssignName.php
new file mode 100644
index 00000000..2ddea78c
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/AssignName.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Node_Expression_AssignName extends Twig_Node_Expression_Name
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('$context[')
+            ->string($this->getAttribute('name'))
+            ->raw(']')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary.php
new file mode 100644
index 00000000..9dd5de2c
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Node_Expression_Binary extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $left, Twig_NodeInterface $right, $lineno)
+    {
+        parent::__construct(array('left' => $left, 'right' => $right), array(), $lineno);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('left'))
+            ->raw(' ')
+        ;
+        $this->operator($compiler);
+        $compiler
+            ->raw(' ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    abstract public function operator(Twig_Compiler $compiler);
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Add.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Add.php
new file mode 100644
index 00000000..0ef8e117
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Add.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Add extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('+');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/And.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/And.php
new file mode 100644
index 00000000..d5752ebb
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/And.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_And extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('&&');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseAnd.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseAnd.php
new file mode 100644
index 00000000..9a46d845
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseAnd.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_BitwiseAnd extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('&');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseOr.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseOr.php
new file mode 100644
index 00000000..058a20bf
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseOr.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_BitwiseOr extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('|');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseXor.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseXor.php
new file mode 100644
index 00000000..f4da73d4
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/BitwiseXor.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_BitwiseXor extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('^');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Concat.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Concat.php
new file mode 100644
index 00000000..f9a64627
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Concat.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Concat extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('.');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Div.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Div.php
new file mode 100644
index 00000000..e0797a61
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Div.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Div extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('/');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Equal.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Equal.php
new file mode 100644
index 00000000..7b1236d0
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Equal.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Equal extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('==');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/FloorDiv.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/FloorDiv.php
new file mode 100644
index 00000000..7fbd0556
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/FloorDiv.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_FloorDiv extends Twig_Node_Expression_Binary
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw('intval(floor(');
+        parent::compile($compiler);
+        $compiler->raw('))');
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('/');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Greater.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Greater.php
new file mode 100644
index 00000000..a110bd92
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Greater.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Greater extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('>');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/GreaterEqual.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/GreaterEqual.php
new file mode 100644
index 00000000..3754fed2
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/GreaterEqual.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_GreaterEqual extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('>=');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/In.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/In.php
new file mode 100644
index 00000000..788f9377
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/In.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_In extends Twig_Node_Expression_Binary
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('twig_in_filter(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('in');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Less.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Less.php
new file mode 100644
index 00000000..45fd3004
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Less.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Less extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('<');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/LessEqual.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/LessEqual.php
new file mode 100644
index 00000000..e38e257c
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/LessEqual.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_LessEqual extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('<=');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Mod.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Mod.php
new file mode 100644
index 00000000..9924114f
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Mod.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Mod extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('%');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Mul.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Mul.php
new file mode 100644
index 00000000..c91529ca
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Mul.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Mul extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('*');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/NotEqual.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/NotEqual.php
new file mode 100644
index 00000000..26867ba2
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/NotEqual.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_NotEqual extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('!=');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/NotIn.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/NotIn.php
new file mode 100644
index 00000000..f347b7b6
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/NotIn.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_NotIn extends Twig_Node_Expression_Binary
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('!twig_in_filter(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('not in');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Or.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Or.php
new file mode 100644
index 00000000..adba49c6
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Or.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Or extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('||');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Power.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Power.php
new file mode 100644
index 00000000..b2c59040
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Power.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Power extends Twig_Node_Expression_Binary
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('pow(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('**');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Range.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Range.php
new file mode 100644
index 00000000..bea4f2a6
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Range.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Range extends Twig_Node_Expression_Binary
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('range(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('..');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Sub.php b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Sub.php
new file mode 100644
index 00000000..d4463991
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Binary/Sub.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Sub extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('-');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/BlockReference.php b/vendor/twig/twig/lib/Twig/Node/Expression/BlockReference.php
new file mode 100644
index 00000000..647196eb
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/BlockReference.php
@@ -0,0 +1,51 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a block call node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_BlockReference extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $name, $asString = false, $lineno, $tag = null)
+    {
+        parent::__construct(array('name' => $name), array('as_string' => $asString, 'output' => false), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        if ($this->getAttribute('as_string')) {
+            $compiler->raw('(string) ');
+        }
+
+        if ($this->getAttribute('output')) {
+            $compiler
+                ->addDebugInfo($this)
+                ->write("\$this->displayBlock(")
+                ->subcompile($this->getNode('name'))
+                ->raw(", \$context, \$blocks);\n")
+            ;
+        } else {
+            $compiler
+                ->raw("\$this->renderBlock(")
+                ->subcompile($this->getNode('name'))
+                ->raw(", \$context, \$blocks)")
+            ;
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Call.php b/vendor/twig/twig/lib/Twig/Node/Expression/Call.php
new file mode 100644
index 00000000..dba9b0e6
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Call.php
@@ -0,0 +1,178 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
+{
+    protected function compileCallable(Twig_Compiler $compiler)
+    {
+        $callable = $this->getAttribute('callable');
+
+        $closingParenthesis = false;
+        if ($callable) {
+            if (is_string($callable)) {
+                $compiler->raw($callable);
+            } elseif (is_array($callable) && $callable[0] instanceof Twig_ExtensionInterface) {
+                $compiler->raw(sprintf('$this->env->getExtension(\'%s\')->%s', $callable[0]->getName(), $callable[1]));
+            } else {
+                $type = ucfirst($this->getAttribute('type'));
+                $compiler->raw(sprintf('call_user_func_array($this->env->get%s(\'%s\')->getCallable(), array', $type, $this->getAttribute('name')));
+                $closingParenthesis = true;
+            }
+        } else {
+            $compiler->raw($this->getAttribute('thing')->compile());
+        }
+
+        $this->compileArguments($compiler);
+
+        if ($closingParenthesis) {
+            $compiler->raw(')');
+        }
+    }
+
+    protected function compileArguments(Twig_Compiler $compiler)
+    {
+        $compiler->raw('(');
+
+        $first = true;
+
+        if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
+            $compiler->raw('$this->env');
+            $first = false;
+        }
+
+        if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $compiler->raw('$context');
+            $first = false;
+        }
+
+        if ($this->hasAttribute('arguments')) {
+            foreach ($this->getAttribute('arguments') as $argument) {
+                if (!$first) {
+                    $compiler->raw(', ');
+                }
+                $compiler->string($argument);
+                $first = false;
+            }
+        }
+
+        if ($this->hasNode('node')) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $compiler->subcompile($this->getNode('node'));
+            $first = false;
+        }
+
+        if ($this->hasNode('arguments') && null !== $this->getNode('arguments')) {
+            $callable = $this->hasAttribute('callable') ? $this->getAttribute('callable') : null;
+
+            $arguments = $this->getArguments($callable, $this->getNode('arguments'));
+
+            foreach ($arguments as $node) {
+                if (!$first) {
+                    $compiler->raw(', ');
+                }
+                $compiler->subcompile($node);
+                $first = false;
+            }
+        }
+
+        $compiler->raw(')');
+    }
+
+    protected function getArguments($callable, $arguments)
+    {
+        $parameters = array();
+        $named = false;
+        foreach ($arguments as $name => $node) {
+            if (!is_int($name)) {
+                $named = true;
+                $name = $this->normalizeName($name);
+            } elseif ($named) {
+                throw new Twig_Error_Syntax(sprintf('Positional arguments cannot be used after named arguments for %s "%s".', $this->getAttribute('type'), $this->getAttribute('name')));
+            }
+
+            $parameters[$name] = $node;
+        }
+
+        if (!$named) {
+            return $parameters;
+        }
+
+        if (!$callable) {
+            throw new LogicException(sprintf('Named arguments are not supported for %s "%s".', $this->getAttribute('type'), $this->getAttribute('name')));
+        }
+
+        // manage named arguments
+        if (is_array($callable)) {
+            $r = new ReflectionMethod($callable[0], $callable[1]);
+        } elseif (is_object($callable) && !$callable instanceof Closure) {
+            $r = new ReflectionObject($callable);
+            $r = $r->getMethod('__invoke');
+        } else {
+            $r = new ReflectionFunction($callable);
+        }
+
+        $definition = $r->getParameters();
+        if ($this->hasNode('node')) {
+            array_shift($definition);
+        }
+        if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
+            array_shift($definition);
+        }
+        if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
+            array_shift($definition);
+        }
+        if ($this->hasAttribute('arguments') && null !== $this->getAttribute('arguments')) {
+            foreach ($this->getAttribute('arguments') as $argument) {
+                array_shift($definition);
+            }
+        }
+
+        $arguments = array();
+        $pos = 0;
+        foreach ($definition as $param) {
+            $name = $this->normalizeName($param->name);
+
+            if (array_key_exists($name, $parameters)) {
+                if (array_key_exists($pos, $parameters)) {
+                    throw new Twig_Error_Syntax(sprintf('Argument "%s" is defined twice for %s "%s".', $name, $this->getAttribute('type'), $this->getAttribute('name')));
+                }
+
+                $arguments[] = $parameters[$name];
+                unset($parameters[$name]);
+            } elseif (array_key_exists($pos, $parameters)) {
+                $arguments[] = $parameters[$pos];
+                unset($parameters[$pos]);
+                ++$pos;
+            } elseif ($param->isDefaultValueAvailable()) {
+                $arguments[] = new Twig_Node_Expression_Constant($param->getDefaultValue(), -1);
+            } elseif ($param->isOptional()) {
+                break;
+            } else {
+                throw new Twig_Error_Syntax(sprintf('Value for argument "%s" is required for %s "%s".', $name, $this->getAttribute('type'), $this->getAttribute('name')));
+            }
+        }
+
+        if (!empty($parameters)) {
+            throw new Twig_Error_Syntax(sprintf('Unknown argument%s "%s" for %s "%s".', count($parameters) > 1 ? 's' : '' , implode('", "', array_keys($parameters)), $this->getAttribute('type'), $this->getAttribute('name')));
+        }
+
+        return $arguments;
+    }
+
+    protected function normalizeName($name)
+    {
+        return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), $name));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Conditional.php b/vendor/twig/twig/lib/Twig/Node/Expression/Conditional.php
new file mode 100644
index 00000000..edcb1e2d
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Conditional.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Conditional extends Twig_Node_Expression
+{
+    public function __construct(Twig_Node_Expression $expr1, Twig_Node_Expression $expr2, Twig_Node_Expression $expr3, $lineno)
+    {
+        parent::__construct(array('expr1' => $expr1, 'expr2' => $expr2, 'expr3' => $expr3), array(), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('((')
+            ->subcompile($this->getNode('expr1'))
+            ->raw(') ? (')
+            ->subcompile($this->getNode('expr2'))
+            ->raw(') : (')
+            ->subcompile($this->getNode('expr3'))
+            ->raw('))')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Constant.php b/vendor/twig/twig/lib/Twig/Node/Expression/Constant.php
new file mode 100644
index 00000000..a91dc698
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Constant.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Constant extends Twig_Node_Expression
+{
+    public function __construct($value, $lineno)
+    {
+        parent::__construct(array(), array('value' => $value), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->repr($this->getAttribute('value'));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/ExtensionReference.php b/vendor/twig/twig/lib/Twig/Node/Expression/ExtensionReference.php
new file mode 100644
index 00000000..00ac6701
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/ExtensionReference.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an extension call node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_ExtensionReference extends Twig_Node_Expression
+{
+    public function __construct($name, $lineno, $tag = null)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw(sprintf("\$this->env->getExtension('%s')", $this->getAttribute('name')));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Filter.php b/vendor/twig/twig/lib/Twig/Node/Expression/Filter.php
new file mode 100644
index 00000000..207b062a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Filter.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Filter extends Twig_Node_Expression_Call
+{
+    public function __construct(Twig_NodeInterface $node, Twig_Node_Expression_Constant $filterName, Twig_NodeInterface $arguments, $lineno, $tag = null)
+    {
+        parent::__construct(array('node' => $node, 'filter' => $filterName, 'arguments' => $arguments), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getNode('filter')->getAttribute('value');
+        $filter = $compiler->getEnvironment()->getFilter($name);
+
+        $this->setAttribute('name', $name);
+        $this->setAttribute('type', 'filter');
+        $this->setAttribute('thing', $filter);
+        $this->setAttribute('needs_environment', $filter->needsEnvironment());
+        $this->setAttribute('needs_context', $filter->needsContext());
+        $this->setAttribute('arguments', $filter->getArguments());
+        if ($filter instanceof Twig_FilterCallableInterface || $filter instanceof Twig_SimpleFilter) {
+            $this->setAttribute('callable', $filter->getCallable());
+        }
+
+        $this->compileCallable($compiler);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Filter/Default.php b/vendor/twig/twig/lib/Twig/Node/Expression/Filter/Default.php
new file mode 100644
index 00000000..1827c888
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Filter/Default.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Returns the value or the default value when it is undefined or empty.
+ *
+ * <pre>
+ *  {{ var.foo|default('foo item on var is not defined') }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Filter_Default extends Twig_Node_Expression_Filter
+{
+    public function __construct(Twig_NodeInterface $node, Twig_Node_Expression_Constant $filterName, Twig_NodeInterface $arguments, $lineno, $tag = null)
+    {
+        $default = new Twig_Node_Expression_Filter($node, new Twig_Node_Expression_Constant('default', $node->getLine()), $arguments, $node->getLine());
+
+        if ('default' === $filterName->getAttribute('value') && ($node instanceof Twig_Node_Expression_Name || $node instanceof Twig_Node_Expression_GetAttr)) {
+            $test = new Twig_Node_Expression_Test_Defined(clone $node, 'defined', new Twig_Node(), $node->getLine());
+            $false = count($arguments) ? $arguments->getNode(0) : new Twig_Node_Expression_Constant('', $node->getLine());
+
+            $node = new Twig_Node_Expression_Conditional($test, $default, $false, $node->getLine());
+        } else {
+            $node = $default;
+        }
+
+        parent::__construct($node, $filterName, $arguments, $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('node'));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Function.php b/vendor/twig/twig/lib/Twig/Node/Expression/Function.php
new file mode 100644
index 00000000..3e1f6b55
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Function.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Function extends Twig_Node_Expression_Call
+{
+    public function __construct($name, Twig_NodeInterface $arguments, $lineno)
+    {
+        parent::__construct(array('arguments' => $arguments), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+        $function = $compiler->getEnvironment()->getFunction($name);
+
+        $this->setAttribute('name', $name);
+        $this->setAttribute('type', 'function');
+        $this->setAttribute('thing', $function);
+        $this->setAttribute('needs_environment', $function->needsEnvironment());
+        $this->setAttribute('needs_context', $function->needsContext());
+        $this->setAttribute('arguments', $function->getArguments());
+        if ($function instanceof Twig_FunctionCallableInterface || $function instanceof Twig_SimpleFunction) {
+            $this->setAttribute('callable', $function->getCallable());
+        }
+
+        $this->compileCallable($compiler);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/GetAttr.php b/vendor/twig/twig/lib/Twig/Node/Expression/GetAttr.php
new file mode 100644
index 00000000..81a9b137
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/GetAttr.php
@@ -0,0 +1,53 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_GetAttr extends Twig_Node_Expression
+{
+    public function __construct(Twig_Node_Expression $node, Twig_Node_Expression $attribute, Twig_Node_Expression_Array $arguments, $type, $lineno)
+    {
+        parent::__construct(array('node' => $node, 'attribute' => $attribute, 'arguments' => $arguments), array('type' => $type, 'is_defined_test' => false, 'ignore_strict_check' => false, 'disable_c_ext' => false), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        if (function_exists('twig_template_get_attributes') && !$this->getAttribute('disable_c_ext')) {
+            $compiler->raw('twig_template_get_attributes($this, ');
+        } else {
+            $compiler->raw('$this->getAttribute(');
+        }
+
+        if ($this->getAttribute('ignore_strict_check')) {
+            $this->getNode('node')->setAttribute('ignore_strict_check', true);
+        }
+
+        $compiler->subcompile($this->getNode('node'));
+
+        $compiler->raw(', ')->subcompile($this->getNode('attribute'));
+
+        if (count($this->getNode('arguments')) || Twig_TemplateInterface::ANY_CALL !== $this->getAttribute('type') || $this->getAttribute('is_defined_test') || $this->getAttribute('ignore_strict_check')) {
+            $compiler->raw(', ')->subcompile($this->getNode('arguments'));
+
+            if (Twig_TemplateInterface::ANY_CALL !== $this->getAttribute('type') || $this->getAttribute('is_defined_test') || $this->getAttribute('ignore_strict_check')) {
+                $compiler->raw(', ')->repr($this->getAttribute('type'));
+            }
+
+            if ($this->getAttribute('is_defined_test') || $this->getAttribute('ignore_strict_check')) {
+                $compiler->raw(', '.($this->getAttribute('is_defined_test') ? 'true' : 'false'));
+            }
+
+            if ($this->getAttribute('ignore_strict_check')) {
+                $compiler->raw(', '.($this->getAttribute('ignore_strict_check') ? 'true' : 'false'));
+            }
+        }
+
+        $compiler->raw(')');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/MethodCall.php b/vendor/twig/twig/lib/Twig/Node/Expression/MethodCall.php
new file mode 100644
index 00000000..620b02bf
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/MethodCall.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_MethodCall extends Twig_Node_Expression
+{
+    public function __construct(Twig_Node_Expression $node, $method, Twig_Node_Expression_Array $arguments, $lineno)
+    {
+        parent::__construct(array('node' => $node, 'arguments' => $arguments), array('method' => $method, 'safe' => false), $lineno);
+
+        if ($node instanceof Twig_Node_Expression_Name) {
+            $node->setAttribute('always_defined', true);
+        }
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->subcompile($this->getNode('node'))
+            ->raw('->')
+            ->raw($this->getAttribute('method'))
+            ->raw('(')
+        ;
+        $first = true;
+        foreach ($this->getNode('arguments')->getKeyValuePairs() as $pair) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $first = false;
+
+            $compiler->subcompile($pair['value']);
+        }
+        $compiler->raw(')');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Name.php b/vendor/twig/twig/lib/Twig/Node/Expression/Name.php
new file mode 100644
index 00000000..3b8fae01
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Name.php
@@ -0,0 +1,88 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Name extends Twig_Node_Expression
+{
+    protected $specialVars = array(
+        '_self'    => '$this',
+        '_context' => '$context',
+        '_charset' => '$this->env->getCharset()',
+    );
+
+    public function __construct($name, $lineno)
+    {
+        parent::__construct(array(), array('name' => $name, 'is_defined_test' => false, 'ignore_strict_check' => false, 'always_defined' => false), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+
+        if ($this->getAttribute('is_defined_test')) {
+            if ($this->isSpecial()) {
+                $compiler->repr(true);
+            } else {
+                $compiler->raw('array_key_exists(')->repr($name)->raw(', $context)');
+            }
+        } elseif ($this->isSpecial()) {
+            $compiler->raw($this->specialVars[$name]);
+        } elseif ($this->getAttribute('always_defined')) {
+            $compiler
+                ->raw('$context[')
+                ->string($name)
+                ->raw(']')
+            ;
+        } else {
+            // remove the non-PHP 5.4 version when PHP 5.3 support is dropped
+            // as the non-optimized version is just a workaround for slow ternary operator
+            // when the context has a lot of variables
+            if (version_compare(phpversion(), '5.4.0RC1', '>=')) {
+                // PHP 5.4 ternary operator performance was optimized
+                $compiler
+                    ->raw('(isset($context[')
+                    ->string($name)
+                    ->raw(']) ? $context[')
+                    ->string($name)
+                    ->raw('] : ')
+                ;
+
+                if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
+                    $compiler->raw('null)');
+                } else {
+                    $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
+                }
+            } else {
+                $compiler
+                    ->raw('$this->getContext($context, ')
+                    ->string($name)
+                ;
+
+                if ($this->getAttribute('ignore_strict_check')) {
+                    $compiler->raw(', true');
+                }
+
+                $compiler
+                    ->raw(')')
+                ;
+            }
+        }
+    }
+
+    public function isSpecial()
+    {
+        return isset($this->specialVars[$this->getAttribute('name')]);
+    }
+
+    public function isSimple()
+    {
+        return !$this->isSpecial() && !$this->getAttribute('is_defined_test');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Parent.php b/vendor/twig/twig/lib/Twig/Node/Expression/Parent.php
new file mode 100644
index 00000000..dcf618c0
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Parent.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a parent node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Parent extends Twig_Node_Expression
+{
+    public function __construct($name, $lineno, $tag = null)
+    {
+        parent::__construct(array(), array('output' => false, 'name' => $name), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        if ($this->getAttribute('output')) {
+            $compiler
+                ->addDebugInfo($this)
+                ->write("\$this->displayParentBlock(")
+                ->string($this->getAttribute('name'))
+                ->raw(", \$context, \$blocks);\n")
+            ;
+        } else {
+            $compiler
+                ->raw("\$this->renderParentBlock(")
+                ->string($this->getAttribute('name'))
+                ->raw(", \$context, \$blocks)")
+            ;
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/TempName.php b/vendor/twig/twig/lib/Twig/Node/Expression/TempName.php
new file mode 100644
index 00000000..e6b058e8
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/TempName.php
@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_TempName extends Twig_Node_Expression
+{
+    public function __construct($name, $lineno)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('$_')
+            ->raw($this->getAttribute('name'))
+            ->raw('_')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test.php
new file mode 100644
index 00000000..639f501a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Test extends Twig_Node_Expression_Call
+{
+    public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
+    {
+        parent::__construct(array('node' => $node, 'arguments' => $arguments), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+        $test = $compiler->getEnvironment()->getTest($name);
+
+        $this->setAttribute('name', $name);
+        $this->setAttribute('type', 'test');
+        $this->setAttribute('thing', $test);
+        if ($test instanceof Twig_TestCallableInterface || $test instanceof Twig_SimpleTest) {
+            $this->setAttribute('callable', $test->getCallable());
+        }
+
+        $this->compileCallable($compiler);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test/Constant.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Constant.php
new file mode 100644
index 00000000..de55f5f5
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Constant.php
@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is the exact same value as a constant.
+ *
+ * <pre>
+ *  {% if post.status is constant('Post::PUBLISHED') %}
+ *    the status attribute is exactly the same as Post::PUBLISHED
+ *  {% endif %}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Constant extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' === constant(')
+        ;
+
+        if ($this->getNode('arguments')->hasNode(1)) {
+            $compiler
+                ->raw('get_class(')
+                ->subcompile($this->getNode('arguments')->getNode(1))
+                ->raw(')."::".')
+            ;
+        }
+
+        $compiler
+            ->subcompile($this->getNode('arguments')->getNode(0))
+            ->raw('))')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test/Defined.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Defined.php
new file mode 100644
index 00000000..247b2e23
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Defined.php
@@ -0,0 +1,54 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is defined in the current context.
+ *
+ * <pre>
+ * {# defined works with variable names and variable attributes #}
+ * {% if foo is defined %}
+ *     {# ... #}
+ * {% endif %}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
+{
+    public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
+    {
+        parent::__construct($node, $name, $arguments, $lineno);
+
+        if ($node instanceof Twig_Node_Expression_Name) {
+            $node->setAttribute('is_defined_test', true);
+        } elseif ($node instanceof Twig_Node_Expression_GetAttr) {
+            $node->setAttribute('is_defined_test', true);
+
+            $this->changeIgnoreStrictCheck($node);
+        } else {
+            throw new Twig_Error_Syntax('The "defined" test only works with simple variables', $this->getLine());
+        }
+    }
+
+    protected function changeIgnoreStrictCheck(Twig_Node_Expression_GetAttr $node)
+    {
+        $node->setAttribute('ignore_strict_check', true);
+
+        if ($node->getNode('node') instanceof Twig_Node_Expression_GetAttr) {
+            $this->changeIgnoreStrictCheck($node->getNode('node'));
+        }
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('node'));
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test/Divisibleby.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Divisibleby.php
new file mode 100644
index 00000000..0aceb530
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Divisibleby.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is divisible by a number.
+ *
+ * <pre>
+ *  {% if loop.index is divisibleby(3) %}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Divisibleby extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(0 == ')
+            ->subcompile($this->getNode('node'))
+            ->raw(' % ')
+            ->subcompile($this->getNode('arguments')->getNode(0))
+            ->raw(')')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test/Even.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Even.php
new file mode 100644
index 00000000..d7853e89
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Even.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a number is even.
+ *
+ * <pre>
+ *  {{ var is even }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Even extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' % 2 == 0')
+            ->raw(')')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test/Null.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Null.php
new file mode 100644
index 00000000..1c83825a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Null.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks that a variable is null.
+ *
+ * <pre>
+ *  {{ var is none }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Null extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(null === ')
+            ->subcompile($this->getNode('node'))
+            ->raw(')')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test/Odd.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Odd.php
new file mode 100644
index 00000000..421c19e8
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Odd.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a number is odd.
+ *
+ * <pre>
+ *  {{ var is odd }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Odd extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' % 2 == 1')
+            ->raw(')')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Test/Sameas.php b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Sameas.php
new file mode 100644
index 00000000..b48905ee
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Test/Sameas.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is the same as another one (=== in PHP).
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Sameas extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' === ')
+            ->subcompile($this->getNode('arguments')->getNode(0))
+            ->raw(')')
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Unary.php b/vendor/twig/twig/lib/Twig/Node/Expression/Unary.php
new file mode 100644
index 00000000..c514388e
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Unary.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Node_Expression_Unary extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $node, $lineno)
+    {
+        parent::__construct(array('node' => $node), array(), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw('(');
+        $this->operator($compiler);
+        $compiler
+            ->subcompile($this->getNode('node'))
+            ->raw(')')
+        ;
+    }
+
+    abstract public function operator(Twig_Compiler $compiler);
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Neg.php b/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Neg.php
new file mode 100644
index 00000000..2a3937ec
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Neg.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Unary_Neg extends Twig_Node_Expression_Unary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        $compiler->raw('-');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Not.php b/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Not.php
new file mode 100644
index 00000000..f94073cf
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Not.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Unary_Not extends Twig_Node_Expression_Unary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        $compiler->raw('!');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Pos.php b/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Pos.php
new file mode 100644
index 00000000..04edb52a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Expression/Unary/Pos.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Unary_Pos extends Twig_Node_Expression_Unary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        $compiler->raw('+');
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Flush.php b/vendor/twig/twig/lib/Twig/Node/Flush.php
new file mode 100644
index 00000000..0467ddce
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Flush.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a flush node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Flush extends Twig_Node
+{
+    public function __construct($lineno, $tag)
+    {
+        parent::__construct(array(), array(), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("flush();\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/For.php b/vendor/twig/twig/lib/Twig/Node/For.php
new file mode 100644
index 00000000..d1ff371d
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/For.php
@@ -0,0 +1,112 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a for node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_For extends Twig_Node
+{
+    protected $loop;
+
+    public function __construct(Twig_Node_Expression_AssignName $keyTarget, Twig_Node_Expression_AssignName $valueTarget, Twig_Node_Expression $seq, Twig_Node_Expression $ifexpr = null, Twig_NodeInterface $body, Twig_NodeInterface $else = null, $lineno, $tag = null)
+    {
+        $body = new Twig_Node(array($body, $this->loop = new Twig_Node_ForLoop($lineno, $tag)));
+
+        if (null !== $ifexpr) {
+            $body = new Twig_Node_If(new Twig_Node(array($ifexpr, $body)), null, $lineno, $tag);
+        }
+
+        parent::__construct(array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body, 'else' => $else), array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            // the (array) cast bypasses a PHP 5.2.6 bug
+            ->write("\$context['_parent'] = (array) \$context;\n")
+            ->write("\$context['_seq'] = twig_ensure_traversable(")
+            ->subcompile($this->getNode('seq'))
+            ->raw(");\n")
+        ;
+
+        if (null !== $this->getNode('else')) {
+            $compiler->write("\$context['_iterated'] = false;\n");
+        }
+
+        if ($this->getAttribute('with_loop')) {
+            $compiler
+                ->write("\$context['loop'] = array(\n")
+                ->write("  'parent' => \$context['_parent'],\n")
+                ->write("  'index0' => 0,\n")
+                ->write("  'index'  => 1,\n")
+                ->write("  'first'  => true,\n")
+                ->write(");\n")
+            ;
+
+            if (!$this->getAttribute('ifexpr')) {
+                $compiler
+                    ->write("if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {\n")
+                    ->indent()
+                    ->write("\$length = count(\$context['_seq']);\n")
+                    ->write("\$context['loop']['revindex0'] = \$length - 1;\n")
+                    ->write("\$context['loop']['revindex'] = \$length;\n")
+                    ->write("\$context['loop']['length'] = \$length;\n")
+                    ->write("\$context['loop']['last'] = 1 === \$length;\n")
+                    ->outdent()
+                    ->write("}\n")
+                ;
+            }
+        }
+
+        $this->loop->setAttribute('else', null !== $this->getNode('else'));
+        $this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
+        $this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));
+
+        $compiler
+            ->write("foreach (\$context['_seq'] as ")
+            ->subcompile($this->getNode('key_target'))
+            ->raw(" => ")
+            ->subcompile($this->getNode('value_target'))
+            ->raw(") {\n")
+            ->indent()
+            ->subcompile($this->getNode('body'))
+            ->outdent()
+            ->write("}\n")
+        ;
+
+        if (null !== $this->getNode('else')) {
+            $compiler
+                ->write("if (!\$context['_iterated']) {\n")
+                ->indent()
+                ->subcompile($this->getNode('else'))
+                ->outdent()
+                ->write("}\n")
+            ;
+        }
+
+        $compiler->write("\$_parent = \$context['_parent'];\n");
+
+        // remove some "private" loop variables (needed for nested loops)
+        $compiler->write('unset($context[\'_seq\'], $context[\'_iterated\'], $context[\''.$this->getNode('key_target')->getAttribute('name').'\'], $context[\''.$this->getNode('value_target')->getAttribute('name').'\'], $context[\'_parent\'], $context[\'loop\']);'."\n");
+
+        // keep the values set in the inner context for variables defined in the outer context
+        $compiler->write("\$context = array_intersect_key(\$context, \$_parent) + \$_parent;\n");
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/ForLoop.php b/vendor/twig/twig/lib/Twig/Node/ForLoop.php
new file mode 100644
index 00000000..b8841583
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/ForLoop.php
@@ -0,0 +1,55 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Internal node used by the for node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_ForLoop extends Twig_Node
+{
+    public function __construct($lineno, $tag = null)
+    {
+        parent::__construct(array(), array('with_loop' => false, 'ifexpr' => false, 'else' => false), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        if ($this->getAttribute('else')) {
+            $compiler->write("\$context['_iterated'] = true;\n");
+        }
+
+        if ($this->getAttribute('with_loop')) {
+            $compiler
+                ->write("++\$context['loop']['index0'];\n")
+                ->write("++\$context['loop']['index'];\n")
+                ->write("\$context['loop']['first'] = false;\n")
+            ;
+
+            if (!$this->getAttribute('ifexpr')) {
+                $compiler
+                    ->write("if (isset(\$context['loop']['length'])) {\n")
+                    ->indent()
+                    ->write("--\$context['loop']['revindex0'];\n")
+                    ->write("--\$context['loop']['revindex'];\n")
+                    ->write("\$context['loop']['last'] = 0 === \$context['loop']['revindex0'];\n")
+                    ->outdent()
+                    ->write("}\n")
+                ;
+            }
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/If.php b/vendor/twig/twig/lib/Twig/Node/If.php
new file mode 100644
index 00000000..4296a8d6
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/If.php
@@ -0,0 +1,66 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an if node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_If extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $tests, Twig_NodeInterface $else = null, $lineno, $tag = null)
+    {
+        parent::__construct(array('tests' => $tests, 'else' => $else), array(), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->addDebugInfo($this);
+        for ($i = 0; $i < count($this->getNode('tests')); $i += 2) {
+            if ($i > 0) {
+                $compiler
+                    ->outdent()
+                    ->write("} elseif (")
+                ;
+            } else {
+                $compiler
+                    ->write('if (')
+                ;
+            }
+
+            $compiler
+                ->subcompile($this->getNode('tests')->getNode($i))
+                ->raw(") {\n")
+                ->indent()
+                ->subcompile($this->getNode('tests')->getNode($i + 1))
+            ;
+        }
+
+        if ($this->hasNode('else') && null !== $this->getNode('else')) {
+            $compiler
+                ->outdent()
+                ->write("} else {\n")
+                ->indent()
+                ->subcompile($this->getNode('else'))
+            ;
+        }
+
+        $compiler
+            ->outdent()
+            ->write("}\n");
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Import.php b/vendor/twig/twig/lib/Twig/Node/Import.php
new file mode 100644
index 00000000..99efc091
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Import.php
@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an import node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Import extends Twig_Node
+{
+    public function __construct(Twig_Node_Expression $expr, Twig_Node_Expression $var, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr, 'var' => $var), array(), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('')
+            ->subcompile($this->getNode('var'))
+            ->raw(' = ')
+        ;
+
+        if ($this->getNode('expr') instanceof Twig_Node_Expression_Name && '_self' === $this->getNode('expr')->getAttribute('name')) {
+            $compiler->raw("\$this");
+        } else {
+            $compiler
+                ->raw('$this->env->loadTemplate(')
+                ->subcompile($this->getNode('expr'))
+                ->raw(")")
+            ;
+        }
+
+        $compiler->raw(";\n");
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Include.php b/vendor/twig/twig/lib/Twig/Node/Include.php
new file mode 100644
index 00000000..ed4a3751
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Include.php
@@ -0,0 +1,99 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an include node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Include extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct(Twig_Node_Expression $expr, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr, 'variables' => $variables), array('only' => (Boolean) $only, 'ignore_missing' => (Boolean) $ignoreMissing), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->addDebugInfo($this);
+
+        if ($this->getAttribute('ignore_missing')) {
+            $compiler
+                ->write("try {\n")
+                ->indent()
+            ;
+        }
+
+        $this->addGetTemplate($compiler);
+
+        $compiler->raw('->display(');
+
+        $this->addTemplateArguments($compiler);
+
+        $compiler->raw(");\n");
+
+        if ($this->getAttribute('ignore_missing')) {
+            $compiler
+                ->outdent()
+                ->write("} catch (Twig_Error_Loader \$e) {\n")
+                ->indent()
+                ->write("// ignore missing template\n")
+                ->outdent()
+                ->write("}\n\n")
+            ;
+        }
+    }
+
+    protected function addGetTemplate(Twig_Compiler $compiler)
+    {
+        if ($this->getNode('expr') instanceof Twig_Node_Expression_Constant) {
+            $compiler
+                ->write("\$this->env->loadTemplate(")
+                ->subcompile($this->getNode('expr'))
+                ->raw(")")
+            ;
+        } else {
+            $compiler
+                ->write("\$template = \$this->env->resolveTemplate(")
+                ->subcompile($this->getNode('expr'))
+                ->raw(");\n")
+                ->write('$template')
+            ;
+        }
+    }
+
+    protected function addTemplateArguments(Twig_Compiler $compiler)
+    {
+        if (false === $this->getAttribute('only')) {
+            if (null === $this->getNode('variables')) {
+                $compiler->raw('$context');
+            } else {
+                $compiler
+                    ->raw('array_merge($context, ')
+                    ->subcompile($this->getNode('variables'))
+                    ->raw(')')
+                ;
+            }
+        } else {
+            if (null === $this->getNode('variables')) {
+                $compiler->raw('array()');
+            } else {
+                $compiler->subcompile($this->getNode('variables'));
+            }
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Macro.php b/vendor/twig/twig/lib/Twig/Node/Macro.php
new file mode 100644
index 00000000..89910618
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Macro.php
@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a macro node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Macro extends Twig_Node
+{
+    public function __construct($name, Twig_NodeInterface $body, Twig_NodeInterface $arguments, $lineno, $tag = null)
+    {
+        parent::__construct(array('body' => $body, 'arguments' => $arguments), array('name' => $name), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write(sprintf("public function get%s(", $this->getAttribute('name')))
+        ;
+
+        $count = count($this->getNode('arguments'));
+        $pos = 0;
+        foreach ($this->getNode('arguments') as $name => $default) {
+            $compiler
+                ->raw('$_'.$name.' = ')
+                ->subcompile($default)
+            ;
+
+            if (++$pos < $count) {
+                $compiler->raw(', ');
+            }
+        }
+
+        $compiler
+            ->raw(")\n")
+            ->write("{\n")
+            ->indent()
+        ;
+
+        if (!count($this->getNode('arguments'))) {
+            $compiler->write("\$context = \$this->env->getGlobals();\n\n");
+        } else {
+            $compiler
+                ->write("\$context = \$this->env->mergeGlobals(array(\n")
+                ->indent()
+            ;
+
+            foreach ($this->getNode('arguments') as $name => $default) {
+                $compiler
+                    ->write('')
+                    ->string($name)
+                    ->raw(' => $_'.$name)
+                    ->raw(",\n")
+                ;
+            }
+
+            $compiler
+                ->outdent()
+                ->write("));\n\n")
+            ;
+        }
+
+        $compiler
+            ->write("\$blocks = array();\n\n")
+            ->write("ob_start();\n")
+            ->write("try {\n")
+            ->indent()
+            ->subcompile($this->getNode('body'))
+            ->outdent()
+            ->write("} catch (Exception \$e) {\n")
+            ->indent()
+            ->write("ob_end_clean();\n\n")
+            ->write("throw \$e;\n")
+            ->outdent()
+            ->write("}\n\n")
+            ->write("return ('' === \$tmp = ob_get_clean()) ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset());\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Module.php b/vendor/twig/twig/lib/Twig/Node/Module.php
new file mode 100644
index 00000000..585048b8
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Module.php
@@ -0,0 +1,371 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a module node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Module extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $body, Twig_Node_Expression $parent = null, Twig_NodeInterface $blocks, Twig_NodeInterface $macros, Twig_NodeInterface $traits, $embeddedTemplates, $filename)
+    {
+        // embedded templates are set as attributes so that they are only visited once by the visitors
+        parent::__construct(array('parent' => $parent, 'body' => $body, 'blocks' => $blocks, 'macros' => $macros, 'traits' => $traits), array('filename' => $filename, 'index' => null, 'embedded_templates' => $embeddedTemplates), 1);
+    }
+
+    public function setIndex($index)
+    {
+        $this->setAttribute('index', $index);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $this->compileTemplate($compiler);
+
+        foreach ($this->getAttribute('embedded_templates') as $template) {
+            $compiler->subcompile($template);
+        }
+    }
+
+    protected function compileTemplate(Twig_Compiler $compiler)
+    {
+        if (!$this->getAttribute('index')) {
+            $compiler->write('<?php');
+        }
+
+        $this->compileClassHeader($compiler);
+
+        if (count($this->getNode('blocks')) || count($this->getNode('traits')) || null === $this->getNode('parent') || $this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
+            $this->compileConstructor($compiler);
+        }
+
+        $this->compileGetParent($compiler);
+
+        $this->compileDisplayHeader($compiler);
+
+        $this->compileDisplayBody($compiler);
+
+        $this->compileDisplayFooter($compiler);
+
+        $compiler->subcompile($this->getNode('blocks'));
+
+        $this->compileMacros($compiler);
+
+        $this->compileGetTemplateName($compiler);
+
+        $this->compileIsTraitable($compiler);
+
+        $this->compileDebugInfo($compiler);
+
+        $this->compileClassFooter($compiler);
+    }
+
+    protected function compileGetParent(Twig_Compiler $compiler)
+    {
+        if (null === $this->getNode('parent')) {
+            return;
+        }
+
+        $compiler
+            ->write("protected function doGetParent(array \$context)\n", "{\n")
+            ->indent()
+            ->write("return ")
+        ;
+
+        if ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
+            $compiler->subcompile($this->getNode('parent'));
+        } else {
+            $compiler
+                ->raw("\$this->env->resolveTemplate(")
+                ->subcompile($this->getNode('parent'))
+                ->raw(")")
+            ;
+        }
+
+        $compiler
+            ->raw(";\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileDisplayBody(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('body'));
+
+        if (null !== $this->getNode('parent')) {
+            if ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
+                $compiler->write("\$this->parent");
+            } else {
+                $compiler->write("\$this->getParent(\$context)");
+            }
+            $compiler->raw("->display(\$context, array_merge(\$this->blocks, \$blocks));\n");
+        }
+    }
+
+    protected function compileClassHeader(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("\n\n")
+            // if the filename contains */, add a blank to avoid a PHP parse error
+            ->write("/* ".str_replace('*/', '* /', $this->getAttribute('filename'))." */\n")
+            ->write('class '.$compiler->getEnvironment()->getTemplateClass($this->getAttribute('filename'), $this->getAttribute('index')))
+            ->raw(sprintf(" extends %s\n", $compiler->getEnvironment()->getBaseTemplateClass()))
+            ->write("{\n")
+            ->indent()
+        ;
+    }
+
+    protected function compileConstructor(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("public function __construct(Twig_Environment \$env)\n", "{\n")
+            ->indent()
+            ->write("parent::__construct(\$env);\n\n")
+        ;
+
+        // parent
+        if (null === $this->getNode('parent')) {
+            $compiler->write("\$this->parent = false;\n\n");
+        } elseif ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
+            $compiler
+                ->write("\$this->parent = \$this->env->loadTemplate(")
+                ->subcompile($this->getNode('parent'))
+                ->raw(");\n\n")
+            ;
+        }
+
+        $countTraits = count($this->getNode('traits'));
+        if ($countTraits) {
+            // traits
+            foreach ($this->getNode('traits') as $i => $trait) {
+                $this->compileLoadTemplate($compiler, $trait->getNode('template'), sprintf('$_trait_%s', $i));
+
+                $compiler
+                    ->addDebugInfo($trait->getNode('template'))
+                    ->write(sprintf("if (!\$_trait_%s->isTraitable()) {\n", $i))
+                    ->indent()
+                    ->write("throw new Twig_Error_Runtime('Template \"'.")
+                    ->subcompile($trait->getNode('template'))
+                    ->raw(".'\" cannot be used as a trait.');\n")
+                    ->outdent()
+                    ->write("}\n")
+                    ->write(sprintf("\$_trait_%s_blocks = \$_trait_%s->getBlocks();\n\n", $i, $i))
+                ;
+
+                foreach ($trait->getNode('targets') as $key => $value) {
+                    $compiler
+                        ->write(sprintf("\$_trait_%s_blocks[", $i))
+                        ->subcompile($value)
+                        ->raw(sprintf("] = \$_trait_%s_blocks[", $i))
+                        ->string($key)
+                        ->raw(sprintf("]; unset(\$_trait_%s_blocks[", $i))
+                        ->string($key)
+                        ->raw("]);\n\n")
+                    ;
+                }
+            }
+
+            if ($countTraits > 1) {
+                $compiler
+                    ->write("\$this->traits = array_merge(\n")
+                    ->indent()
+                ;
+
+                for ($i = 0; $i < $countTraits; $i++) {
+                    $compiler
+                        ->write(sprintf("\$_trait_%s_blocks".($i == $countTraits - 1 ? '' : ',')."\n", $i))
+                    ;
+                }
+
+                $compiler
+                    ->outdent()
+                    ->write(");\n\n")
+                ;
+            } else {
+                $compiler
+                    ->write("\$this->traits = \$_trait_0_blocks;\n\n")
+                ;
+            }
+
+            $compiler
+                ->write("\$this->blocks = array_merge(\n")
+                ->indent()
+                ->write("\$this->traits,\n")
+                ->write("array(\n")
+            ;
+        } else {
+            $compiler
+                ->write("\$this->blocks = array(\n")
+            ;
+        }
+
+        // blocks
+        $compiler
+            ->indent()
+        ;
+
+        foreach ($this->getNode('blocks') as $name => $node) {
+            $compiler
+                ->write(sprintf("'%s' => array(\$this, 'block_%s'),\n", $name, $name))
+            ;
+        }
+
+        if ($countTraits) {
+            $compiler
+                ->outdent()
+                ->write(")\n")
+            ;
+        }
+
+        $compiler
+            ->outdent()
+            ->write(");\n")
+            ->outdent()
+            ->write("}\n\n");
+        ;
+    }
+
+    protected function compileDisplayHeader(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("protected function doDisplay(array \$context, array \$blocks = array())\n", "{\n")
+            ->indent()
+        ;
+    }
+
+    protected function compileDisplayFooter(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileClassFooter(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->outdent()
+            ->write("}\n")
+        ;
+    }
+
+    protected function compileMacros(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('macros'));
+    }
+
+    protected function compileGetTemplateName(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("public function getTemplateName()\n", "{\n")
+            ->indent()
+            ->write('return ')
+            ->repr($this->getAttribute('filename'))
+            ->raw(";\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileIsTraitable(Twig_Compiler $compiler)
+    {
+        // A template can be used as a trait if:
+        //   * it has no parent
+        //   * it has no macros
+        //   * it has no body
+        //
+        // Put another way, a template can be used as a trait if it
+        // only contains blocks and use statements.
+        $traitable = null === $this->getNode('parent') && 0 === count($this->getNode('macros'));
+        if ($traitable) {
+            if ($this->getNode('body') instanceof Twig_Node_Body) {
+                $nodes = $this->getNode('body')->getNode(0);
+            } else {
+                $nodes = $this->getNode('body');
+            }
+
+            if (!count($nodes)) {
+                $nodes = new Twig_Node(array($nodes));
+            }
+
+            foreach ($nodes as $node) {
+                if (!count($node)) {
+                    continue;
+                }
+
+                if ($node instanceof Twig_Node_Text && ctype_space($node->getAttribute('data'))) {
+                    continue;
+                }
+
+                if ($node instanceof Twig_Node_BlockReference) {
+                    continue;
+                }
+
+                $traitable = false;
+                break;
+            }
+        }
+
+        if ($traitable) {
+            return;
+        }
+
+        $compiler
+            ->write("public function isTraitable()\n", "{\n")
+            ->indent()
+            ->write(sprintf("return %s;\n", $traitable ? 'true' : 'false'))
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileDebugInfo(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("public function getDebugInfo()\n", "{\n")
+            ->indent()
+            ->write(sprintf("return %s;\n", str_replace("\n", '', var_export(array_reverse($compiler->getDebugInfo(), true), true))))
+            ->outdent()
+            ->write("}\n")
+        ;
+    }
+
+    protected function compileLoadTemplate(Twig_Compiler $compiler, $node, $var)
+    {
+        if ($node instanceof Twig_Node_Expression_Constant) {
+            $compiler
+                ->write(sprintf("%s = \$this->env->loadTemplate(", $var))
+                ->subcompile($node)
+                ->raw(");\n")
+            ;
+        } else {
+            $compiler
+                ->write(sprintf("%s = ", $var))
+                ->subcompile($node)
+                ->raw(";\n")
+                ->write(sprintf("if (!%s", $var))
+                ->raw(" instanceof Twig_Template) {\n")
+                ->indent()
+                ->write(sprintf("%s = \$this->env->loadTemplate(%s);\n", $var, $var))
+                ->outdent()
+                ->write("}\n")
+            ;
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Print.php b/vendor/twig/twig/lib/Twig/Node/Print.php
new file mode 100644
index 00000000..b0c41d1d
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Print.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a node that outputs an expression.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Print extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct(Twig_Node_Expression $expr, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr), array(), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('echo ')
+            ->subcompile($this->getNode('expr'))
+            ->raw(";\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Sandbox.php b/vendor/twig/twig/lib/Twig/Node/Sandbox.php
new file mode 100644
index 00000000..8cf3ed44
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Sandbox.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a sandbox node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Sandbox extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $body, $lineno, $tag = null)
+    {
+        parent::__construct(array('body' => $body), array(), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("\$sandbox = \$this->env->getExtension('sandbox');\n")
+            ->write("if (!\$alreadySandboxed = \$sandbox->isSandboxed()) {\n")
+            ->indent()
+            ->write("\$sandbox->enableSandbox();\n")
+            ->outdent()
+            ->write("}\n")
+            ->subcompile($this->getNode('body'))
+            ->write("if (!\$alreadySandboxed) {\n")
+            ->indent()
+            ->write("\$sandbox->disableSandbox();\n")
+            ->outdent()
+            ->write("}\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/SandboxedModule.php b/vendor/twig/twig/lib/Twig/Node/SandboxedModule.php
new file mode 100644
index 00000000..be1f5daa
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/SandboxedModule.php
@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a module node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_SandboxedModule extends Twig_Node_Module
+{
+    protected $usedFilters;
+    protected $usedTags;
+    protected $usedFunctions;
+
+    public function __construct(Twig_Node_Module $node, array $usedFilters, array $usedTags, array $usedFunctions)
+    {
+        parent::__construct($node->getNode('body'), $node->getNode('parent'), $node->getNode('blocks'), $node->getNode('macros'), $node->getNode('traits'), $node->getAttribute('embedded_templates'), $node->getAttribute('filename'), $node->getLine(), $node->getNodeTag());
+
+        $this->setAttribute('index', $node->getAttribute('index'));
+
+        $this->usedFilters = $usedFilters;
+        $this->usedTags = $usedTags;
+        $this->usedFunctions = $usedFunctions;
+    }
+
+    protected function compileDisplayBody(Twig_Compiler $compiler)
+    {
+        $compiler->write("\$this->checkSecurity();\n");
+
+        parent::compileDisplayBody($compiler);
+    }
+
+    protected function compileDisplayFooter(Twig_Compiler $compiler)
+    {
+        parent::compileDisplayFooter($compiler);
+
+        $compiler
+            ->write("protected function checkSecurity()\n", "{\n")
+            ->indent()
+            ->write("\$this->env->getExtension('sandbox')->checkSecurity(\n")
+            ->indent()
+            ->write(!$this->usedTags ? "array(),\n" : "array('".implode('\', \'', $this->usedTags)."'),\n")
+            ->write(!$this->usedFilters ? "array(),\n" : "array('".implode('\', \'', $this->usedFilters)."'),\n")
+            ->write(!$this->usedFunctions ? "array()\n" : "array('".implode('\', \'', $this->usedFunctions)."')\n")
+            ->outdent()
+            ->write(");\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/SandboxedPrint.php b/vendor/twig/twig/lib/Twig/Node/SandboxedPrint.php
new file mode 100644
index 00000000..73dfaa96
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/SandboxedPrint.php
@@ -0,0 +1,59 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_Node_SandboxedPrint adds a check for the __toString() method
+ * when the variable is an object and the sandbox is activated.
+ *
+ * When there is a simple Print statement, like {{ article }},
+ * and if the sandbox is enabled, we need to check that the __toString()
+ * method is allowed if 'article' is an object.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_SandboxedPrint extends Twig_Node_Print
+{
+    public function __construct(Twig_Node_Expression $expr, $lineno, $tag = null)
+    {
+        parent::__construct($expr, $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('echo $this->env->getExtension(\'sandbox\')->ensureToStringAllowed(')
+            ->subcompile($this->getNode('expr'))
+            ->raw(");\n")
+        ;
+    }
+
+    /**
+     * Removes node filters.
+     *
+     * This is mostly needed when another visitor adds filters (like the escaper one).
+     *
+     * @param Twig_Node $node A Node
+     */
+    protected function removeNodeFilter($node)
+    {
+        if ($node instanceof Twig_Node_Expression_Filter) {
+            return $this->removeNodeFilter($node->getNode('node'));
+        }
+
+        return $node;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Set.php b/vendor/twig/twig/lib/Twig/Node/Set.php
new file mode 100644
index 00000000..4c9c16ce
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Set.php
@@ -0,0 +1,101 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a set node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Set extends Twig_Node
+{
+    public function __construct($capture, Twig_NodeInterface $names, Twig_NodeInterface $values, $lineno, $tag = null)
+    {
+        parent::__construct(array('names' => $names, 'values' => $values), array('capture' => $capture, 'safe' => false), $lineno, $tag);
+
+        /*
+         * Optimizes the node when capture is used for a large block of text.
+         *
+         * {% set foo %}foo{% endset %} is compiled to $context['foo'] = new Twig_Markup("foo");
+         */
+        if ($this->getAttribute('capture')) {
+            $this->setAttribute('safe', true);
+
+            $values = $this->getNode('values');
+            if ($values instanceof Twig_Node_Text) {
+                $this->setNode('values', new Twig_Node_Expression_Constant($values->getAttribute('data'), $values->getLine()));
+                $this->setAttribute('capture', false);
+            }
+        }
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->addDebugInfo($this);
+
+        if (count($this->getNode('names')) > 1) {
+            $compiler->write('list(');
+            foreach ($this->getNode('names') as $idx => $node) {
+                if ($idx) {
+                    $compiler->raw(', ');
+                }
+
+                $compiler->subcompile($node);
+            }
+            $compiler->raw(')');
+        } else {
+            if ($this->getAttribute('capture')) {
+                $compiler
+                    ->write("ob_start();\n")
+                    ->subcompile($this->getNode('values'))
+                ;
+            }
+
+            $compiler->subcompile($this->getNode('names'), false);
+
+            if ($this->getAttribute('capture')) {
+                $compiler->raw(" = ('' === \$tmp = ob_get_clean()) ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset())");
+            }
+        }
+
+        if (!$this->getAttribute('capture')) {
+            $compiler->raw(' = ');
+
+            if (count($this->getNode('names')) > 1) {
+                $compiler->write('array(');
+                foreach ($this->getNode('values') as $idx => $value) {
+                    if ($idx) {
+                        $compiler->raw(', ');
+                    }
+
+                    $compiler->subcompile($value);
+                }
+                $compiler->raw(')');
+            } else {
+                if ($this->getAttribute('safe')) {
+                    $compiler
+                        ->raw("('' === \$tmp = ")
+                        ->subcompile($this->getNode('values'))
+                        ->raw(") ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset())")
+                    ;
+                } else {
+                    $compiler->subcompile($this->getNode('values'));
+                }
+            }
+        }
+
+        $compiler->raw(";\n");
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/SetTemp.php b/vendor/twig/twig/lib/Twig/Node/SetTemp.php
new file mode 100644
index 00000000..3bdd1cb7
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/SetTemp.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Node_SetTemp extends Twig_Node
+{
+    public function __construct($name, $lineno)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+        $compiler
+            ->addDebugInfo($this)
+            ->write('if (isset($context[')
+            ->string($name)
+            ->raw('])) { $_')
+            ->raw($name)
+            ->raw('_ = $context[')
+            ->repr($name)
+            ->raw(']; } else { $_')
+            ->raw($name)
+            ->raw("_ = null; }\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Spaceless.php b/vendor/twig/twig/lib/Twig/Node/Spaceless.php
new file mode 100644
index 00000000..7555fa0f
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Spaceless.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a spaceless node.
+ *
+ * It removes spaces between HTML tags.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Spaceless extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $body, $lineno, $tag = 'spaceless')
+    {
+        parent::__construct(array('body' => $body), array(), $lineno, $tag);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("ob_start();\n")
+            ->subcompile($this->getNode('body'))
+            ->write("echo trim(preg_replace('/>\s+</', '><', ob_get_clean()));\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Node/Text.php b/vendor/twig/twig/lib/Twig/Node/Text.php
new file mode 100644
index 00000000..21bdcea1
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Node/Text.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a text node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Text extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct($data, $lineno)
+    {
+        parent::__construct(array(), array('data' => $data), $lineno);
+    }
+
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('echo ')
+            ->string($this->getAttribute('data'))
+            ->raw(";\n")
+        ;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeInterface.php b/vendor/twig/twig/lib/Twig/NodeInterface.php
new file mode 100644
index 00000000..f0ef7258
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeInterface.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_NodeInterface extends Countable, IteratorAggregate
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler);
+
+    public function getLine();
+
+    public function getNodeTag();
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeOutputInterface.php b/vendor/twig/twig/lib/Twig/NodeOutputInterface.php
new file mode 100644
index 00000000..22172c09
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeOutputInterface.php
@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a displayable node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_NodeOutputInterface
+{
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeTraverser.php b/vendor/twig/twig/lib/Twig/NodeTraverser.php
new file mode 100644
index 00000000..28cba1ad
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeTraverser.php
@@ -0,0 +1,88 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeTraverser is a node traverser.
+ *
+ * It visits all nodes and their children and call the given visitor for each.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeTraverser
+{
+    protected $env;
+    protected $visitors;
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment $env      A Twig_Environment instance
+     * @param array            $visitors An array of Twig_NodeVisitorInterface instances
+     */
+    public function __construct(Twig_Environment $env, array $visitors = array())
+    {
+        $this->env = $env;
+        $this->visitors = array();
+        foreach ($visitors as $visitor) {
+            $this->addVisitor($visitor);
+        }
+    }
+
+    /**
+     * Adds a visitor.
+     *
+     * @param Twig_NodeVisitorInterface $visitor A Twig_NodeVisitorInterface instance
+     */
+    public function addVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        if (!isset($this->visitors[$visitor->getPriority()])) {
+            $this->visitors[$visitor->getPriority()] = array();
+        }
+
+        $this->visitors[$visitor->getPriority()][] = $visitor;
+    }
+
+    /**
+     * Traverses a node and calls the registered visitors.
+     *
+     * @param Twig_NodeInterface $node A Twig_NodeInterface instance
+     */
+    public function traverse(Twig_NodeInterface $node)
+    {
+        ksort($this->visitors);
+        foreach ($this->visitors as $visitors) {
+            foreach ($visitors as $visitor) {
+                $node = $this->traverseForVisitor($visitor, $node);
+            }
+        }
+
+        return $node;
+    }
+
+    protected function traverseForVisitor(Twig_NodeVisitorInterface $visitor, Twig_NodeInterface $node = null)
+    {
+        if (null === $node) {
+            return null;
+        }
+
+        $node = $visitor->enterNode($node, $this->env);
+
+        foreach ($node as $k => $n) {
+            if (false !== $n = $this->traverseForVisitor($visitor, $n)) {
+                $node->setNode($k, $n);
+            } else {
+                $node->removeNode($k);
+            }
+        }
+
+        return $visitor->leaveNode($node, $this->env);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeVisitor/Escaper.php b/vendor/twig/twig/lib/Twig/NodeVisitor/Escaper.php
new file mode 100644
index 00000000..cc4b3d71
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeVisitor/Escaper.php
@@ -0,0 +1,167 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitor_Escaper implements output escaping.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeVisitor_Escaper implements Twig_NodeVisitorInterface
+{
+    protected $statusStack = array();
+    protected $blocks = array();
+    protected $safeAnalysis;
+    protected $traverser;
+    protected $defaultStrategy = false;
+    protected $safeVars = array();
+
+    public function __construct()
+    {
+        $this->safeAnalysis = new Twig_NodeVisitor_SafeAnalysis();
+    }
+
+    /**
+     * Called before child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface The modified node
+     */
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            if ($env->hasExtension('escaper') && $defaultStrategy = $env->getExtension('escaper')->getDefaultStrategy($node->getAttribute('filename'))) {
+                $this->defaultStrategy = $defaultStrategy;
+            }
+            $this->safeVars = array();
+        } elseif ($node instanceof Twig_Node_AutoEscape) {
+            $this->statusStack[] = $node->getAttribute('value');
+        } elseif ($node instanceof Twig_Node_Block) {
+            $this->statusStack[] = isset($this->blocks[$node->getAttribute('name')]) ? $this->blocks[$node->getAttribute('name')] : $this->needEscaping($env);
+        } elseif ($node instanceof Twig_Node_Import) {
+            $this->safeVars[] = $node->getNode('var')->getAttribute('name');
+        }
+
+        return $node;
+    }
+
+    /**
+     * Called after child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface The modified node
+     */
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            $this->defaultStrategy = false;
+            $this->safeVars = array();
+        } elseif ($node instanceof Twig_Node_Expression_Filter) {
+            return $this->preEscapeFilterNode($node, $env);
+        } elseif ($node instanceof Twig_Node_Print) {
+            return $this->escapePrintNode($node, $env, $this->needEscaping($env));
+        }
+
+        if ($node instanceof Twig_Node_AutoEscape || $node instanceof Twig_Node_Block) {
+            array_pop($this->statusStack);
+        } elseif ($node instanceof Twig_Node_BlockReference) {
+            $this->blocks[$node->getAttribute('name')] = $this->needEscaping($env);
+        }
+
+        return $node;
+    }
+
+    protected function escapePrintNode(Twig_Node_Print $node, Twig_Environment $env, $type)
+    {
+        if (false === $type) {
+            return $node;
+        }
+
+        $expression = $node->getNode('expr');
+
+        if ($this->isSafeFor($type, $expression, $env)) {
+            return $node;
+        }
+
+        $class = get_class($node);
+
+        return new $class(
+            $this->getEscaperFilter($type, $expression),
+            $node->getLine()
+        );
+    }
+
+    protected function preEscapeFilterNode(Twig_Node_Expression_Filter $filter, Twig_Environment $env)
+    {
+        $name = $filter->getNode('filter')->getAttribute('value');
+
+        $type = $env->getFilter($name)->getPreEscape();
+        if (null === $type) {
+            return $filter;
+        }
+
+        $node = $filter->getNode('node');
+        if ($this->isSafeFor($type, $node, $env)) {
+            return $filter;
+        }
+
+        $filter->setNode('node', $this->getEscaperFilter($type, $node));
+
+        return $filter;
+    }
+
+    protected function isSafeFor($type, Twig_NodeInterface $expression, $env)
+    {
+        $safe = $this->safeAnalysis->getSafe($expression);
+
+        if (null === $safe) {
+            if (null === $this->traverser) {
+                $this->traverser = new Twig_NodeTraverser($env, array($this->safeAnalysis));
+            }
+
+            $this->safeAnalysis->setSafeVars($this->safeVars);
+
+            $this->traverser->traverse($expression);
+            $safe = $this->safeAnalysis->getSafe($expression);
+        }
+
+        return in_array($type, $safe) || in_array('all', $safe);
+    }
+
+    protected function needEscaping(Twig_Environment $env)
+    {
+        if (count($this->statusStack)) {
+            return $this->statusStack[count($this->statusStack) - 1];
+        }
+
+        return $this->defaultStrategy ? $this->defaultStrategy : false;
+    }
+
+    protected function getEscaperFilter($type, Twig_NodeInterface $node)
+    {
+        $line = $node->getLine();
+        $name = new Twig_Node_Expression_Constant('escape', $line);
+        $args = new Twig_Node(array(new Twig_Node_Expression_Constant((string) $type, $line), new Twig_Node_Expression_Constant(null, $line), new Twig_Node_Expression_Constant(true, $line)));
+
+        return new Twig_Node_Expression_Filter($node, $name, $args, $line);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php b/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php
new file mode 100644
index 00000000..a254def7
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php
@@ -0,0 +1,246 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitor_Optimizer tries to optimizes the AST.
+ *
+ * This visitor is always the last registered one.
+ *
+ * You can configure which optimizations you want to activate via the
+ * optimizer mode.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeVisitor_Optimizer implements Twig_NodeVisitorInterface
+{
+    const OPTIMIZE_ALL         = -1;
+    const OPTIMIZE_NONE        = 0;
+    const OPTIMIZE_FOR         = 2;
+    const OPTIMIZE_RAW_FILTER  = 4;
+    const OPTIMIZE_VAR_ACCESS  = 8;
+
+    protected $loops = array();
+    protected $optimizers;
+    protected $prependedNodes = array();
+    protected $inABody = false;
+
+    /**
+     * Constructor.
+     *
+     * @param integer $optimizers The optimizer mode
+     */
+    public function __construct($optimizers = -1)
+    {
+        if (!is_int($optimizers) || $optimizers > 2) {
+            throw new InvalidArgumentException(sprintf('Optimizer mode "%s" is not valid.', $optimizers));
+        }
+
+        $this->optimizers = $optimizers;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if (self::OPTIMIZE_FOR === (self::OPTIMIZE_FOR & $this->optimizers)) {
+            $this->enterOptimizeFor($node, $env);
+        }
+
+        if (!version_compare(phpversion(), '5.4.0RC1', '>=') && self::OPTIMIZE_VAR_ACCESS === (self::OPTIMIZE_VAR_ACCESS & $this->optimizers) && !$env->isStrictVariables() && !$env->hasExtension('sandbox')) {
+            if ($this->inABody) {
+                if (!$node instanceof Twig_Node_Expression) {
+                    if (get_class($node) !== 'Twig_Node') {
+                        array_unshift($this->prependedNodes, array());
+                    }
+                } else {
+                    $node = $this->optimizeVariables($node, $env);
+                }
+            } elseif ($node instanceof Twig_Node_Body) {
+                $this->inABody = true;
+            }
+        }
+
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        $expression = $node instanceof Twig_Node_Expression;
+
+        if (self::OPTIMIZE_FOR === (self::OPTIMIZE_FOR & $this->optimizers)) {
+            $this->leaveOptimizeFor($node, $env);
+        }
+
+        if (self::OPTIMIZE_RAW_FILTER === (self::OPTIMIZE_RAW_FILTER & $this->optimizers)) {
+            $node = $this->optimizeRawFilter($node, $env);
+        }
+
+        $node = $this->optimizePrintNode($node, $env);
+
+        if (self::OPTIMIZE_VAR_ACCESS === (self::OPTIMIZE_VAR_ACCESS & $this->optimizers) && !$env->isStrictVariables() && !$env->hasExtension('sandbox')) {
+            if ($node instanceof Twig_Node_Body) {
+                $this->inABody = false;
+            } elseif ($this->inABody) {
+                if (!$expression && get_class($node) !== 'Twig_Node' && $prependedNodes = array_shift($this->prependedNodes)) {
+                    $nodes = array();
+                    foreach (array_unique($prependedNodes) as $name) {
+                        $nodes[] = new Twig_Node_SetTemp($name, $node->getLine());
+                    }
+
+                    $nodes[] = $node;
+                    $node = new Twig_Node($nodes);
+                }
+            }
+        }
+
+        return $node;
+    }
+
+    protected function optimizeVariables($node, $env)
+    {
+        if ('Twig_Node_Expression_Name' === get_class($node) && $node->isSimple()) {
+            $this->prependedNodes[0][] = $node->getAttribute('name');
+
+            return new Twig_Node_Expression_TempName($node->getAttribute('name'), $node->getLine());
+        }
+
+        return $node;
+    }
+
+    /**
+     * Optimizes print nodes.
+     *
+     * It replaces:
+     *
+     *   * "echo $this->render(Parent)Block()" with "$this->display(Parent)Block()"
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     */
+    protected function optimizePrintNode($node, $env)
+    {
+        if (!$node instanceof Twig_Node_Print) {
+            return $node;
+        }
+
+        if (
+            $node->getNode('expr') instanceof Twig_Node_Expression_BlockReference ||
+            $node->getNode('expr') instanceof Twig_Node_Expression_Parent
+        ) {
+            $node->getNode('expr')->setAttribute('output', true);
+
+            return $node->getNode('expr');
+        }
+
+        return $node;
+    }
+
+    /**
+     * Removes "raw" filters.
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     */
+    protected function optimizeRawFilter($node, $env)
+    {
+        if ($node instanceof Twig_Node_Expression_Filter && 'raw' == $node->getNode('filter')->getAttribute('value')) {
+            return $node->getNode('node');
+        }
+
+        return $node;
+    }
+
+    /**
+     * Optimizes "for" tag by removing the "loop" variable creation whenever possible.
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     */
+    protected function enterOptimizeFor($node, $env)
+    {
+        if ($node instanceof Twig_Node_For) {
+            // disable the loop variable by default
+            $node->setAttribute('with_loop', false);
+            array_unshift($this->loops, $node);
+        } elseif (!$this->loops) {
+            // we are outside a loop
+            return;
+        }
+
+        // when do we need to add the loop variable back?
+
+        // the loop variable is referenced for the current loop
+        elseif ($node instanceof Twig_Node_Expression_Name && 'loop' === $node->getAttribute('name')) {
+            $this->addLoopToCurrent();
+        }
+
+        // block reference
+        elseif ($node instanceof Twig_Node_BlockReference || $node instanceof Twig_Node_Expression_BlockReference) {
+            $this->addLoopToCurrent();
+        }
+
+        // include without the only attribute
+        elseif ($node instanceof Twig_Node_Include && !$node->getAttribute('only')) {
+            $this->addLoopToAll();
+        }
+
+        // the loop variable is referenced via an attribute
+        elseif ($node instanceof Twig_Node_Expression_GetAttr
+            && (!$node->getNode('attribute') instanceof Twig_Node_Expression_Constant
+                || 'parent' === $node->getNode('attribute')->getAttribute('value')
+               )
+            && (true === $this->loops[0]->getAttribute('with_loop')
+                || ($node->getNode('node') instanceof Twig_Node_Expression_Name
+                    && 'loop' === $node->getNode('node')->getAttribute('name')
+                   )
+               )
+        ) {
+            $this->addLoopToAll();
+        }
+    }
+
+    /**
+     * Optimizes "for" tag by removing the "loop" variable creation whenever possible.
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     */
+    protected function leaveOptimizeFor($node, $env)
+    {
+        if ($node instanceof Twig_Node_For) {
+            array_shift($this->loops);
+        }
+    }
+
+    protected function addLoopToCurrent()
+    {
+        $this->loops[0]->setAttribute('with_loop', true);
+    }
+
+    protected function addLoopToAll()
+    {
+        foreach ($this->loops as $loop) {
+            $loop->setAttribute('with_loop', true);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 255;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeVisitor/SafeAnalysis.php b/vendor/twig/twig/lib/Twig/NodeVisitor/SafeAnalysis.php
new file mode 100644
index 00000000..c4bbd812
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeVisitor/SafeAnalysis.php
@@ -0,0 +1,131 @@
+<?php
+
+class Twig_NodeVisitor_SafeAnalysis implements Twig_NodeVisitorInterface
+{
+    protected $data = array();
+    protected $safeVars = array();
+
+    public function setSafeVars($safeVars)
+    {
+        $this->safeVars = $safeVars;
+    }
+
+    public function getSafe(Twig_NodeInterface $node)
+    {
+        $hash = spl_object_hash($node);
+        if (isset($this->data[$hash])) {
+            foreach ($this->data[$hash] as $bucket) {
+                if ($bucket['key'] === $node) {
+                    return $bucket['value'];
+                }
+            }
+        }
+    }
+
+    protected function setSafe(Twig_NodeInterface $node, array $safe)
+    {
+        $hash = spl_object_hash($node);
+        if (isset($this->data[$hash])) {
+            foreach ($this->data[$hash] as &$bucket) {
+                if ($bucket['key'] === $node) {
+                    $bucket['value'] = $safe;
+
+                    return;
+                }
+            }
+        }
+        $this->data[$hash][] = array(
+            'key' => $node,
+            'value' => $safe,
+        );
+    }
+
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        return $node;
+    }
+
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Expression_Constant) {
+            // constants are marked safe for all
+            $this->setSafe($node, array('all'));
+        } elseif ($node instanceof Twig_Node_Expression_BlockReference) {
+            // blocks are safe by definition
+            $this->setSafe($node, array('all'));
+        } elseif ($node instanceof Twig_Node_Expression_Parent) {
+            // parent block is safe by definition
+            $this->setSafe($node, array('all'));
+        } elseif ($node instanceof Twig_Node_Expression_Conditional) {
+            // intersect safeness of both operands
+            $safe = $this->intersectSafe($this->getSafe($node->getNode('expr2')), $this->getSafe($node->getNode('expr3')));
+            $this->setSafe($node, $safe);
+        } elseif ($node instanceof Twig_Node_Expression_Filter) {
+            // filter expression is safe when the filter is safe
+            $name = $node->getNode('filter')->getAttribute('value');
+            $args = $node->getNode('arguments');
+            if (false !== $filter = $env->getFilter($name)) {
+                $safe = $filter->getSafe($args);
+                if (null === $safe) {
+                    $safe = $this->intersectSafe($this->getSafe($node->getNode('node')), $filter->getPreservesSafety());
+                }
+                $this->setSafe($node, $safe);
+            } else {
+                $this->setSafe($node, array());
+            }
+        } elseif ($node instanceof Twig_Node_Expression_Function) {
+            // function expression is safe when the function is safe
+            $name = $node->getAttribute('name');
+            $args = $node->getNode('arguments');
+            $function = $env->getFunction($name);
+            if (false !== $function) {
+                $this->setSafe($node, $function->getSafe($args));
+            } else {
+                $this->setSafe($node, array());
+            }
+        } elseif ($node instanceof Twig_Node_Expression_MethodCall) {
+            if ($node->getAttribute('safe')) {
+                $this->setSafe($node, array('all'));
+            } else {
+                $this->setSafe($node, array());
+            }
+        } elseif ($node instanceof Twig_Node_Expression_GetAttr && $node->getNode('node') instanceof Twig_Node_Expression_Name) {
+            $name = $node->getNode('node')->getAttribute('name');
+            // attributes on template instances are safe
+            if ('_self' == $name || in_array($name, $this->safeVars)) {
+                $this->setSafe($node, array('all'));
+            } else {
+                $this->setSafe($node, array());
+            }
+        } else {
+            $this->setSafe($node, array());
+        }
+
+        return $node;
+    }
+
+    protected function intersectSafe(array $a = null, array $b = null)
+    {
+        if (null === $a || null === $b) {
+            return array();
+        }
+
+        if (in_array('all', $a)) {
+            return $b;
+        }
+
+        if (in_array('all', $b)) {
+            return $a;
+        }
+
+        return array_intersect($a, $b);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeVisitor/Sandbox.php b/vendor/twig/twig/lib/Twig/NodeVisitor/Sandbox.php
new file mode 100644
index 00000000..fb27045b
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeVisitor/Sandbox.php
@@ -0,0 +1,92 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitor_Sandbox implements sandboxing.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeVisitor_Sandbox implements Twig_NodeVisitorInterface
+{
+    protected $inAModule = false;
+    protected $tags;
+    protected $filters;
+    protected $functions;
+
+    /**
+     * Called before child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface The modified node
+     */
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            $this->inAModule = true;
+            $this->tags = array();
+            $this->filters = array();
+            $this->functions = array();
+
+            return $node;
+        } elseif ($this->inAModule) {
+            // look for tags
+            if ($node->getNodeTag()) {
+                $this->tags[] = $node->getNodeTag();
+            }
+
+            // look for filters
+            if ($node instanceof Twig_Node_Expression_Filter) {
+                $this->filters[] = $node->getNode('filter')->getAttribute('value');
+            }
+
+            // look for functions
+            if ($node instanceof Twig_Node_Expression_Function) {
+                $this->functions[] = $node->getAttribute('name');
+            }
+
+            // wrap print to check __toString() calls
+            if ($node instanceof Twig_Node_Print) {
+                return new Twig_Node_SandboxedPrint($node->getNode('expr'), $node->getLine(), $node->getNodeTag());
+            }
+        }
+
+        return $node;
+    }
+
+    /**
+     * Called after child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface The modified node
+     */
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            $this->inAModule = false;
+
+            return new Twig_Node_SandboxedModule($node, array_unique($this->filters), array_unique($this->tags), array_unique($this->functions));
+        }
+
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/NodeVisitorInterface.php b/vendor/twig/twig/lib/Twig/NodeVisitorInterface.php
new file mode 100644
index 00000000..f33c13fc
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/NodeVisitorInterface.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitorInterface is the interface the all node visitor classes must implement.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_NodeVisitorInterface
+{
+    /**
+     * Called before child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface The modified node
+     */
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env);
+
+    /**
+     * Called after child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface|false The modified node or false if the node must be removed
+     */
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env);
+
+    /**
+     * Returns the priority for this visitor.
+     *
+     * Priority should be between -10 and 10 (0 is the default).
+     *
+     * @return integer The priority level
+     */
+    public function getPriority();
+}
diff --git a/vendor/twig/twig/lib/Twig/Parser.php b/vendor/twig/twig/lib/Twig/Parser.php
new file mode 100644
index 00000000..958e46b3
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Parser.php
@@ -0,0 +1,394 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default parser implementation.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Parser implements Twig_ParserInterface
+{
+    protected $stack = array();
+    protected $stream;
+    protected $parent;
+    protected $handlers;
+    protected $visitors;
+    protected $expressionParser;
+    protected $blocks;
+    protected $blockStack;
+    protected $macros;
+    protected $env;
+    protected $reservedMacroNames;
+    protected $importedSymbols;
+    protected $traits;
+    protected $embeddedTemplates = array();
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment $env A Twig_Environment instance
+     */
+    public function __construct(Twig_Environment $env)
+    {
+        $this->env = $env;
+    }
+
+    public function getEnvironment()
+    {
+        return $this->env;
+    }
+
+    public function getVarName()
+    {
+        return sprintf('__internal_%s', hash('sha1', uniqid(mt_rand(), true), false));
+    }
+
+    public function getFilename()
+    {
+        return $this->stream->getFilename();
+    }
+
+    /**
+     * Converts a token stream to a node tree.
+     *
+     * @param Twig_TokenStream $stream A token stream instance
+     *
+     * @return Twig_Node_Module A node tree
+     */
+    public function parse(Twig_TokenStream $stream, $test = null, $dropNeedle = false)
+    {
+        // push all variables into the stack to keep the current state of the parser
+        $vars = get_object_vars($this);
+        unset($vars['stack'], $vars['env'], $vars['handlers'], $vars['visitors'], $vars['expressionParser']);
+        $this->stack[] = $vars;
+
+        // tag handlers
+        if (null === $this->handlers) {
+            $this->handlers = $this->env->getTokenParsers();
+            $this->handlers->setParser($this);
+        }
+
+        // node visitors
+        if (null === $this->visitors) {
+            $this->visitors = $this->env->getNodeVisitors();
+        }
+
+        if (null === $this->expressionParser) {
+            $this->expressionParser = new Twig_ExpressionParser($this, $this->env->getUnaryOperators(), $this->env->getBinaryOperators());
+        }
+
+        $this->stream = $stream;
+        $this->parent = null;
+        $this->blocks = array();
+        $this->macros = array();
+        $this->traits = array();
+        $this->blockStack = array();
+        $this->importedSymbols = array(array());
+        $this->embeddedTemplates = array();
+
+        try {
+            $body = $this->subparse($test, $dropNeedle);
+
+            if (null !== $this->parent) {
+                if (null === $body = $this->filterBodyNodes($body)) {
+                    $body = new Twig_Node();
+                }
+            }
+        } catch (Twig_Error_Syntax $e) {
+            if (!$e->getTemplateFile()) {
+                $e->setTemplateFile($this->getFilename());
+            }
+
+            if (!$e->getTemplateLine()) {
+                $e->setTemplateLine($this->stream->getCurrent()->getLine());
+            }
+
+            throw $e;
+        }
+
+        $node = new Twig_Node_Module(new Twig_Node_Body(array($body)), $this->parent, new Twig_Node($this->blocks), new Twig_Node($this->macros), new Twig_Node($this->traits), $this->embeddedTemplates, $this->getFilename());
+
+        $traverser = new Twig_NodeTraverser($this->env, $this->visitors);
+
+        $node = $traverser->traverse($node);
+
+        // restore previous stack so previous parse() call can resume working
+        foreach (array_pop($this->stack) as $key => $val) {
+            $this->$key = $val;
+        }
+
+        return $node;
+    }
+
+    public function subparse($test, $dropNeedle = false)
+    {
+        $lineno = $this->getCurrentToken()->getLine();
+        $rv = array();
+        while (!$this->stream->isEOF()) {
+            switch ($this->getCurrentToken()->getType()) {
+                case Twig_Token::TEXT_TYPE:
+                    $token = $this->stream->next();
+                    $rv[] = new Twig_Node_Text($token->getValue(), $token->getLine());
+                    break;
+
+                case Twig_Token::VAR_START_TYPE:
+                    $token = $this->stream->next();
+                    $expr = $this->expressionParser->parseExpression();
+                    $this->stream->expect(Twig_Token::VAR_END_TYPE);
+                    $rv[] = new Twig_Node_Print($expr, $token->getLine());
+                    break;
+
+                case Twig_Token::BLOCK_START_TYPE:
+                    $this->stream->next();
+                    $token = $this->getCurrentToken();
+
+                    if ($token->getType() !== Twig_Token::NAME_TYPE) {
+                        throw new Twig_Error_Syntax('A block must start with a tag name', $token->getLine(), $this->getFilename());
+                    }
+
+                    if (null !== $test && call_user_func($test, $token)) {
+                        if ($dropNeedle) {
+                            $this->stream->next();
+                        }
+
+                        if (1 === count($rv)) {
+                            return $rv[0];
+                        }
+
+                        return new Twig_Node($rv, array(), $lineno);
+                    }
+
+                    $subparser = $this->handlers->getTokenParser($token->getValue());
+                    if (null === $subparser) {
+                        if (null !== $test) {
+                            $error = sprintf('Unexpected tag name "%s"', $token->getValue());
+                            if (is_array($test) && isset($test[0]) && $test[0] instanceof Twig_TokenParserInterface) {
+                                $error .= sprintf(' (expecting closing tag for the "%s" tag defined near line %s)', $test[0]->getTag(), $lineno);
+                            }
+
+                            throw new Twig_Error_Syntax($error, $token->getLine(), $this->getFilename());
+                        }
+
+                        $message = sprintf('Unknown tag name "%s"', $token->getValue());
+                        if ($alternatives = $this->env->computeAlternatives($token->getValue(), array_keys($this->env->getTags()))) {
+                            $message = sprintf('%s. Did you mean "%s"', $message, implode('", "', $alternatives));
+                        }
+
+                        throw new Twig_Error_Syntax($message, $token->getLine(), $this->getFilename());
+                    }
+
+                    $this->stream->next();
+
+                    $node = $subparser->parse($token);
+                    if (null !== $node) {
+                        $rv[] = $node;
+                    }
+                    break;
+
+                default:
+                    throw new Twig_Error_Syntax('Lexer or parser ended up in unsupported state.', 0, $this->getFilename());
+            }
+        }
+
+        if (1 === count($rv)) {
+            return $rv[0];
+        }
+
+        return new Twig_Node($rv, array(), $lineno);
+    }
+
+    public function addHandler($name, $class)
+    {
+        $this->handlers[$name] = $class;
+    }
+
+    public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        $this->visitors[] = $visitor;
+    }
+
+    public function getBlockStack()
+    {
+        return $this->blockStack;
+    }
+
+    public function peekBlockStack()
+    {
+        return $this->blockStack[count($this->blockStack) - 1];
+    }
+
+    public function popBlockStack()
+    {
+        array_pop($this->blockStack);
+    }
+
+    public function pushBlockStack($name)
+    {
+        $this->blockStack[] = $name;
+    }
+
+    public function hasBlock($name)
+    {
+        return isset($this->blocks[$name]);
+    }
+
+    public function getBlock($name)
+    {
+        return $this->blocks[$name];
+    }
+
+    public function setBlock($name, $value)
+    {
+        $this->blocks[$name] = new Twig_Node_Body(array($value), array(), $value->getLine());
+    }
+
+    public function hasMacro($name)
+    {
+        return isset($this->macros[$name]);
+    }
+
+    public function setMacro($name, Twig_Node_Macro $node)
+    {
+        if (null === $this->reservedMacroNames) {
+            $this->reservedMacroNames = array();
+            $r = new ReflectionClass($this->env->getBaseTemplateClass());
+            foreach ($r->getMethods() as $method) {
+                $this->reservedMacroNames[] = $method->getName();
+            }
+        }
+
+        if (in_array($name, $this->reservedMacroNames)) {
+            throw new Twig_Error_Syntax(sprintf('"%s" cannot be used as a macro name as it is a reserved keyword', $name), $node->getLine(), $this->getFilename());
+        }
+
+        $this->macros[$name] = $node;
+    }
+
+    public function addTrait($trait)
+    {
+        $this->traits[] = $trait;
+    }
+
+    public function hasTraits()
+    {
+        return count($this->traits) > 0;
+    }
+
+    public function embedTemplate(Twig_Node_Module $template)
+    {
+        $template->setIndex(mt_rand());
+
+        $this->embeddedTemplates[] = $template;
+    }
+
+    public function addImportedSymbol($type, $alias, $name = null, Twig_Node_Expression $node = null)
+    {
+        $this->importedSymbols[0][$type][$alias] = array('name' => $name, 'node' => $node);
+    }
+
+    public function getImportedSymbol($type, $alias)
+    {
+        foreach ($this->importedSymbols as $functions) {
+            if (isset($functions[$type][$alias])) {
+                return $functions[$type][$alias];
+            }
+        }
+    }
+
+    public function isMainScope()
+    {
+        return 1 === count($this->importedSymbols);
+    }
+
+    public function pushLocalScope()
+    {
+        array_unshift($this->importedSymbols, array());
+    }
+
+    public function popLocalScope()
+    {
+        array_shift($this->importedSymbols);
+    }
+
+    /**
+     * Gets the expression parser.
+     *
+     * @return Twig_ExpressionParser The expression parser
+     */
+    public function getExpressionParser()
+    {
+        return $this->expressionParser;
+    }
+
+    public function getParent()
+    {
+        return $this->parent;
+    }
+
+    public function setParent($parent)
+    {
+        $this->parent = $parent;
+    }
+
+    /**
+     * Gets the token stream.
+     *
+     * @return Twig_TokenStream The token stream
+     */
+    public function getStream()
+    {
+        return $this->stream;
+    }
+
+    /**
+     * Gets the current token.
+     *
+     * @return Twig_Token The current token
+     */
+    public function getCurrentToken()
+    {
+        return $this->stream->getCurrent();
+    }
+
+    protected function filterBodyNodes(Twig_NodeInterface $node)
+    {
+        // check that the body does not contain non-empty output nodes
+        if (
+            ($node instanceof Twig_Node_Text && !ctype_space($node->getAttribute('data')))
+            ||
+            (!$node instanceof Twig_Node_Text && !$node instanceof Twig_Node_BlockReference && $node instanceof Twig_NodeOutputInterface)
+        ) {
+            if (false !== strpos((string) $node, chr(0xEF).chr(0xBB).chr(0xBF))) {
+                throw new Twig_Error_Syntax('A template that extends another one cannot have a body but a byte order mark (BOM) has been detected; it must be removed.', $node->getLine(), $this->getFilename());
+            }
+
+            throw new Twig_Error_Syntax('A template that extends another one cannot have a body.', $node->getLine(), $this->getFilename());
+        }
+
+        // bypass "set" nodes as they "capture" the output
+        if ($node instanceof Twig_Node_Set) {
+            return $node;
+        }
+
+        if ($node instanceof Twig_NodeOutputInterface) {
+            return;
+        }
+
+        foreach ($node as $k => $n) {
+            if (null !== $n && null === $n = $this->filterBodyNodes($n)) {
+                $node->removeNode($k);
+            }
+        }
+
+        return $node;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/ParserInterface.php b/vendor/twig/twig/lib/Twig/ParserInterface.php
new file mode 100644
index 00000000..f0d79009
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/ParserInterface.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by parser classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_ParserInterface
+{
+    /**
+     * Converts a token stream to a node tree.
+     *
+     * @param Twig_TokenStream $stream A token stream instance
+     *
+     * @return Twig_Node_Module A node tree
+     */
+    public function parse(Twig_TokenStream $stream);
+}
diff --git a/vendor/twig/twig/lib/Twig/Sandbox/SecurityError.php b/vendor/twig/twig/lib/Twig/Sandbox/SecurityError.php
new file mode 100644
index 00000000..015bfaea
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Sandbox/SecurityError.php
@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when a security error occurs at runtime.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Sandbox_SecurityError extends Twig_Error
+{
+}
diff --git a/vendor/twig/twig/lib/Twig/Sandbox/SecurityPolicy.php b/vendor/twig/twig/lib/Twig/Sandbox/SecurityPolicy.php
new file mode 100644
index 00000000..66ee2332
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Sandbox/SecurityPolicy.php
@@ -0,0 +1,119 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a security policy which need to be enforced when sandbox mode is enabled.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Sandbox_SecurityPolicy implements Twig_Sandbox_SecurityPolicyInterface
+{
+    protected $allowedTags;
+    protected $allowedFilters;
+    protected $allowedMethods;
+    protected $allowedProperties;
+    protected $allowedFunctions;
+
+    public function __construct(array $allowedTags = array(), array $allowedFilters = array(), array $allowedMethods = array(), array $allowedProperties = array(), array $allowedFunctions = array())
+    {
+        $this->allowedTags = $allowedTags;
+        $this->allowedFilters = $allowedFilters;
+        $this->setAllowedMethods($allowedMethods);
+        $this->allowedProperties = $allowedProperties;
+        $this->allowedFunctions = $allowedFunctions;
+    }
+
+    public function setAllowedTags(array $tags)
+    {
+        $this->allowedTags = $tags;
+    }
+
+    public function setAllowedFilters(array $filters)
+    {
+        $this->allowedFilters = $filters;
+    }
+
+    public function setAllowedMethods(array $methods)
+    {
+        $this->allowedMethods = array();
+        foreach ($methods as $class => $m) {
+            $this->allowedMethods[$class] = array_map('strtolower', is_array($m) ? $m : array($m));
+        }
+    }
+
+    public function setAllowedProperties(array $properties)
+    {
+        $this->allowedProperties = $properties;
+    }
+
+    public function setAllowedFunctions(array $functions)
+    {
+        $this->allowedFunctions = $functions;
+    }
+
+    public function checkSecurity($tags, $filters, $functions)
+    {
+        foreach ($tags as $tag) {
+            if (!in_array($tag, $this->allowedTags)) {
+                throw new Twig_Sandbox_SecurityError(sprintf('Tag "%s" is not allowed.', $tag));
+            }
+        }
+
+        foreach ($filters as $filter) {
+            if (!in_array($filter, $this->allowedFilters)) {
+                throw new Twig_Sandbox_SecurityError(sprintf('Filter "%s" is not allowed.', $filter));
+            }
+        }
+
+        foreach ($functions as $function) {
+            if (!in_array($function, $this->allowedFunctions)) {
+                throw new Twig_Sandbox_SecurityError(sprintf('Function "%s" is not allowed.', $function));
+            }
+        }
+    }
+
+    public function checkMethodAllowed($obj, $method)
+    {
+        if ($obj instanceof Twig_TemplateInterface || $obj instanceof Twig_Markup) {
+            return true;
+        }
+
+        $allowed = false;
+        $method = strtolower($method);
+        foreach ($this->allowedMethods as $class => $methods) {
+            if ($obj instanceof $class) {
+                $allowed = in_array($method, $methods);
+
+                break;
+            }
+        }
+
+        if (!$allowed) {
+            throw new Twig_Sandbox_SecurityError(sprintf('Calling "%s" method on a "%s" object is not allowed.', $method, get_class($obj)));
+        }
+    }
+
+    public function checkPropertyAllowed($obj, $property)
+    {
+        $allowed = false;
+        foreach ($this->allowedProperties as $class => $properties) {
+            if ($obj instanceof $class) {
+                $allowed = in_array($property, is_array($properties) ? $properties : array($properties));
+
+                break;
+            }
+        }
+
+        if (!$allowed) {
+            throw new Twig_Sandbox_SecurityError(sprintf('Calling "%s" property on a "%s" object is not allowed.', $property, get_class($obj)));
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Sandbox/SecurityPolicyInterface.php b/vendor/twig/twig/lib/Twig/Sandbox/SecurityPolicyInterface.php
new file mode 100644
index 00000000..6ab48e3c
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Sandbox/SecurityPolicyInterface.php
@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interfaces that all security policy classes must implements.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_Sandbox_SecurityPolicyInterface
+{
+    public function checkSecurity($tags, $filters, $functions);
+
+    public function checkMethodAllowed($obj, $method);
+
+    public function checkPropertyAllowed($obj, $method);
+}
diff --git a/vendor/twig/twig/lib/Twig/SimpleFilter.php b/vendor/twig/twig/lib/Twig/SimpleFilter.php
new file mode 100644
index 00000000..d35c5633
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/SimpleFilter.php
@@ -0,0 +1,94 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009-2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template filter.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_SimpleFilter
+{
+    protected $name;
+    protected $callable;
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct($name, $callable, array $options = array())
+    {
+        $this->name = $name;
+        $this->callable = $callable;
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context'     => false,
+            'is_safe'           => null,
+            'is_safe_callback'  => null,
+            'pre_escape'        => null,
+            'preserves_safety'  => null,
+            'node_class'        => 'Twig_Node_Expression_Filter',
+        ), $options);
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function getCallable()
+    {
+        return $this->callable;
+    }
+
+    public function getNodeClass()
+    {
+        return $this->options['node_class'];
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $filterArgs)
+    {
+        if (null !== $this->options['is_safe']) {
+            return $this->options['is_safe'];
+        }
+
+        if (null !== $this->options['is_safe_callback']) {
+            return call_user_func($this->options['is_safe_callback'], $filterArgs);
+        }
+    }
+
+    public function getPreservesSafety()
+    {
+        return $this->options['preserves_safety'];
+    }
+
+    public function getPreEscape()
+    {
+        return $this->options['pre_escape'];
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/SimpleFunction.php b/vendor/twig/twig/lib/Twig/SimpleFunction.php
new file mode 100644
index 00000000..8ef6aca2
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/SimpleFunction.php
@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010-2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template function.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_SimpleFunction
+{
+    protected $name;
+    protected $callable;
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct($name, $callable, array $options = array())
+    {
+        $this->name = $name;
+        $this->callable = $callable;
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context'     => false,
+            'is_safe'           => null,
+            'is_safe_callback'  => null,
+            'node_class'        => 'Twig_Node_Expression_Function',
+        ), $options);
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function getCallable()
+    {
+        return $this->callable;
+    }
+
+    public function getNodeClass()
+    {
+        return $this->options['node_class'];
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $functionArgs)
+    {
+        if (null !== $this->options['is_safe']) {
+            return $this->options['is_safe'];
+        }
+
+        if (null !== $this->options['is_safe_callback']) {
+            return call_user_func($this->options['is_safe_callback'], $functionArgs);
+        }
+
+        return array();
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/SimpleTest.php b/vendor/twig/twig/lib/Twig/SimpleTest.php
new file mode 100644
index 00000000..225459c9
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/SimpleTest.php
@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010-2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_SimpleTest
+{
+    protected $name;
+    protected $callable;
+    protected $options;
+
+    public function __construct($name, $callable, array $options = array())
+    {
+        $this->name = $name;
+        $this->callable = $callable;
+        $this->options = array_merge(array(
+            'node_class' => 'Twig_Node_Expression_Test',
+        ), $options);
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function getCallable()
+    {
+        return $this->callable;
+    }
+
+    public function getNodeClass()
+    {
+        return $this->options['node_class'];
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Template.php b/vendor/twig/twig/lib/Twig/Template.php
new file mode 100644
index 00000000..a001ca03
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Template.php
@@ -0,0 +1,455 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default base class for compiled templates.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Twig_Template implements Twig_TemplateInterface
+{
+    protected static $cache = array();
+
+    protected $parent;
+    protected $parents;
+    protected $env;
+    protected $blocks;
+    protected $traits;
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment $env A Twig_Environment instance
+     */
+    public function __construct(Twig_Environment $env)
+    {
+        $this->env = $env;
+        $this->blocks = array();
+        $this->traits = array();
+    }
+
+    /**
+     * Returns the template name.
+     *
+     * @return string The template name
+     */
+    abstract public function getTemplateName();
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getEnvironment()
+    {
+        return $this->env;
+    }
+
+    /**
+     * Returns the parent template.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @return Twig_TemplateInterface|false The parent template or false if there is no parent
+     */
+    public function getParent(array $context)
+    {
+        if (null !== $this->parent) {
+            return $this->parent;
+        }
+
+        $parent = $this->doGetParent($context);
+        if (false === $parent) {
+            return false;
+        } elseif ($parent instanceof Twig_Template) {
+            $name = $parent->getTemplateName();
+            $this->parents[$name] = $parent;
+            $parent = $name;
+        } elseif (!isset($this->parents[$parent])) {
+            $this->parents[$parent] = $this->env->loadTemplate($parent);
+        }
+
+        return $this->parents[$parent];
+    }
+
+    protected function doGetParent(array $context)
+    {
+        return false;
+    }
+
+    public function isTraitable()
+    {
+        return true;
+    }
+
+    /**
+     * Displays a parent block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name    The block name to display from the parent
+     * @param array  $context The context
+     * @param array  $blocks  The current set of blocks
+     */
+    public function displayParentBlock($name, array $context, array $blocks = array())
+    {
+        $name = (string) $name;
+
+        if (isset($this->traits[$name])) {
+            $this->traits[$name][0]->displayBlock($name, $context, $blocks);
+        } elseif (false !== $parent = $this->getParent($context)) {
+            $parent->displayBlock($name, $context, $blocks);
+        } else {
+            throw new Twig_Error_Runtime(sprintf('The template has no parent and no traits defining the "%s" block', $name), -1, $this->getTemplateName());
+        }
+    }
+
+    /**
+     * Displays a block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name    The block name to display
+     * @param array  $context The context
+     * @param array  $blocks  The current set of blocks
+     */
+    public function displayBlock($name, array $context, array $blocks = array())
+    {
+        $name = (string) $name;
+
+        if (isset($blocks[$name])) {
+            $b = $blocks;
+            unset($b[$name]);
+            call_user_func($blocks[$name], $context, $b);
+        } elseif (isset($this->blocks[$name])) {
+            call_user_func($this->blocks[$name], $context, $blocks);
+        } elseif (false !== $parent = $this->getParent($context)) {
+            $parent->displayBlock($name, $context, array_merge($this->blocks, $blocks));
+        }
+    }
+
+    /**
+     * Renders a parent block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name    The block name to render from the parent
+     * @param array  $context The context
+     * @param array  $blocks  The current set of blocks
+     *
+     * @return string The rendered block
+     */
+    public function renderParentBlock($name, array $context, array $blocks = array())
+    {
+        ob_start();
+        $this->displayParentBlock($name, $context, $blocks);
+
+        return ob_get_clean();
+    }
+
+    /**
+     * Renders a block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name    The block name to render
+     * @param array  $context The context
+     * @param array  $blocks  The current set of blocks
+     *
+     * @return string The rendered block
+     */
+    public function renderBlock($name, array $context, array $blocks = array())
+    {
+        ob_start();
+        $this->displayBlock($name, $context, $blocks);
+
+        return ob_get_clean();
+    }
+
+    /**
+     * Returns whether a block exists or not.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * This method does only return blocks defined in the current template
+     * or defined in "used" traits.
+     *
+     * It does not return blocks from parent templates as the parent
+     * template name can be dynamic, which is only known based on the
+     * current context.
+     *
+     * @param string $name The block name
+     *
+     * @return Boolean true if the block exists, false otherwise
+     */
+    public function hasBlock($name)
+    {
+        return isset($this->blocks[(string) $name]);
+    }
+
+    /**
+     * Returns all block names.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @return array An array of block names
+     *
+     * @see hasBlock
+     */
+    public function getBlockNames()
+    {
+        return array_keys($this->blocks);
+    }
+
+    /**
+     * Returns all blocks.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @return array An array of blocks
+     *
+     * @see hasBlock
+     */
+    public function getBlocks()
+    {
+        return $this->blocks;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function display(array $context, array $blocks = array())
+    {
+        $this->displayWithErrorHandling($this->env->mergeGlobals($context), $blocks);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function render(array $context)
+    {
+        $level = ob_get_level();
+        ob_start();
+        try {
+            $this->display($context);
+        } catch (Exception $e) {
+            while (ob_get_level() > $level) {
+                ob_end_clean();
+            }
+
+            throw $e;
+        }
+
+        return ob_get_clean();
+    }
+
+    protected function displayWithErrorHandling(array $context, array $blocks = array())
+    {
+        try {
+            $this->doDisplay($context, $blocks);
+        } catch (Twig_Error $e) {
+            if (!$e->getTemplateFile()) {
+                $e->setTemplateFile($this->getTemplateName());
+            }
+
+            // this is mostly useful for Twig_Error_Loader exceptions
+            // see Twig_Error_Loader
+            if (false === $e->getTemplateLine()) {
+                $e->setTemplateLine(-1);
+                $e->guess();
+            }
+
+            throw $e;
+        } catch (Exception $e) {
+            throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, null, $e);
+        }
+    }
+
+    /**
+     * Auto-generated method to display the template with the given context.
+     *
+     * @param array $context An array of parameters to pass to the template
+     * @param array $blocks  An array of blocks to pass to the template
+     */
+    abstract protected function doDisplay(array $context, array $blocks = array());
+
+    /**
+     * Returns a variable from the context.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * This method should not be overridden in a sub-class as this is an
+     * implementation detail that has been introduced to optimize variable
+     * access for versions of PHP before 5.4. This is not a way to override
+     * the way to get a variable value.
+     *
+     * @param array   $context           The context
+     * @param string  $item              The variable to return from the context
+     * @param Boolean $ignoreStrictCheck Whether to ignore the strict variable check or not
+     *
+     * @return The content of the context variable
+     *
+     * @throws Twig_Error_Runtime if the variable does not exist and Twig is running in strict mode
+     */
+    final protected function getContext($context, $item, $ignoreStrictCheck = false)
+    {
+        if (!array_key_exists($item, $context)) {
+            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                return null;
+            }
+
+            throw new Twig_Error_Runtime(sprintf('Variable "%s" does not exist', $item), -1, $this->getTemplateName());
+        }
+
+        return $context[$item];
+    }
+
+    /**
+     * Returns the attribute value for a given array/object.
+     *
+     * @param mixed   $object            The object or array from where to get the item
+     * @param mixed   $item              The item to get from the array or object
+     * @param array   $arguments         An array of arguments to pass if the item is an object method
+     * @param string  $type              The type of attribute (@see Twig_TemplateInterface)
+     * @param Boolean $isDefinedTest     Whether this is only a defined check
+     * @param Boolean $ignoreStrictCheck Whether to ignore the strict attribute check or not
+     *
+     * @return mixed The attribute value, or a Boolean when $isDefinedTest is true, or null when the attribute is not set and $ignoreStrictCheck is true
+     *
+     * @throws Twig_Error_Runtime if the attribute does not exist and Twig is running in strict mode and $isDefinedTest is false
+     */
+    protected function getAttribute($object, $item, array $arguments = array(), $type = Twig_TemplateInterface::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
+    {
+        // array
+        if (Twig_TemplateInterface::METHOD_CALL !== $type) {
+            $arrayItem = is_bool($item) || is_float($item) ? (int) $item : $item;
+
+            if ((is_array($object) && array_key_exists($arrayItem, $object))
+                || ($object instanceof ArrayAccess && isset($object[$arrayItem]))
+            ) {
+                if ($isDefinedTest) {
+                    return true;
+                }
+
+                return $object[$arrayItem];
+            }
+
+            if (Twig_TemplateInterface::ARRAY_CALL === $type || !is_object($object)) {
+                if ($isDefinedTest) {
+                    return false;
+                }
+
+                if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                    return null;
+                }
+
+                if (is_object($object)) {
+                    throw new Twig_Error_Runtime(sprintf('Key "%s" in object (with ArrayAccess) of type "%s" does not exist', $arrayItem, get_class($object)), -1, $this->getTemplateName());
+                } elseif (is_array($object)) {
+                    throw new Twig_Error_Runtime(sprintf('Key "%s" for array with keys "%s" does not exist', $arrayItem, implode(', ', array_keys($object))), -1, $this->getTemplateName());
+                } elseif (Twig_TemplateInterface::ARRAY_CALL === $type) {
+                    throw new Twig_Error_Runtime(sprintf('Impossible to access a key ("%s") on a %s variable ("%s")', $item, gettype($object), $object), -1, $this->getTemplateName());
+                } else {
+                    throw new Twig_Error_Runtime(sprintf('Impossible to access an attribute ("%s") on a %s variable ("%s")', $item, gettype($object), $object), -1, $this->getTemplateName());
+                }
+            }
+        }
+
+        if (!is_object($object)) {
+            if ($isDefinedTest) {
+                return false;
+            }
+
+            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                return null;
+            }
+
+            throw new Twig_Error_Runtime(sprintf('Impossible to invoke a method ("%s") on a %s variable ("%s")', $item, gettype($object), $object), -1, $this->getTemplateName());
+        }
+
+        $class = get_class($object);
+
+        // object property
+        if (Twig_TemplateInterface::METHOD_CALL !== $type) {
+            if (isset($object->$item) || array_key_exists((string) $item, $object)) {
+                if ($isDefinedTest) {
+                    return true;
+                }
+
+                if ($this->env->hasExtension('sandbox')) {
+                    $this->env->getExtension('sandbox')->checkPropertyAllowed($object, $item);
+                }
+
+                return $object->$item;
+            }
+        }
+
+        // object method
+        if (!isset(self::$cache[$class]['methods'])) {
+            self::$cache[$class]['methods'] = array_change_key_case(array_flip(get_class_methods($object)));
+        }
+
+        $lcItem = strtolower($item);
+        if (isset(self::$cache[$class]['methods'][$lcItem])) {
+            $method = (string) $item;
+        } elseif (isset(self::$cache[$class]['methods']['get'.$lcItem])) {
+            $method = 'get'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['is'.$lcItem])) {
+            $method = 'is'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['__call'])) {
+            $method = (string) $item;
+        } else {
+            if ($isDefinedTest) {
+                return false;
+            }
+
+            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                return null;
+            }
+
+            throw new Twig_Error_Runtime(sprintf('Method "%s" for object "%s" does not exist', $item, get_class($object)), -1, $this->getTemplateName());
+        }
+
+        if ($isDefinedTest) {
+            return true;
+        }
+
+        if ($this->env->hasExtension('sandbox')) {
+            $this->env->getExtension('sandbox')->checkMethodAllowed($object, $method);
+        }
+
+        $ret = call_user_func_array(array($object, $method), $arguments);
+
+        // useful when calling a template method from a template
+        // this is not supported but unfortunately heavily used in the Symfony profiler
+        if ($object instanceof Twig_TemplateInterface) {
+            return $ret === '' ? '' : new Twig_Markup($ret, $this->env->getCharset());
+        }
+
+        return $ret;
+    }
+
+    /**
+     * This method is only useful when testing Twig. Do not use it.
+     */
+    public static function clearCache()
+    {
+        self::$cache = array();
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TemplateInterface.php b/vendor/twig/twig/lib/Twig/TemplateInterface.php
new file mode 100644
index 00000000..879f503e
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TemplateInterface.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by all compiled templates.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_TemplateInterface
+{
+    const ANY_CALL    = 'any';
+    const ARRAY_CALL  = 'array';
+    const METHOD_CALL = 'method';
+
+    /**
+     * Renders the template with the given context and returns it as string.
+     *
+     * @param array $context An array of parameters to pass to the template
+     *
+     * @return string The rendered template
+     */
+    public function render(array $context);
+
+    /**
+     * Displays the template with the given context.
+     *
+     * @param array $context An array of parameters to pass to the template
+     * @param array $blocks  An array of blocks to pass to the template
+     */
+    public function display(array $context, array $blocks = array());
+
+    /**
+     * Returns the bound environment for this template.
+     *
+     * @return Twig_Environment The current environment
+     */
+    public function getEnvironment();
+}
diff --git a/vendor/twig/twig/lib/Twig/Test.php b/vendor/twig/twig/lib/Twig/Test.php
new file mode 100644
index 00000000..3baff885
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Test.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+abstract class Twig_Test implements Twig_TestInterface, Twig_TestCallableInterface
+{
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct(array $options = array())
+    {
+        $this->options = array_merge(array(
+            'callable' => null,
+        ), $options);
+    }
+
+    public function getCallable()
+    {
+        return $this->options['callable'];
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Test/Function.php b/vendor/twig/twig/lib/Twig/Test/Function.php
new file mode 100644
index 00000000..4be6b9b9
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Test/Function.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a function template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Function extends Twig_Test
+{
+    protected $function;
+
+    public function __construct($function, array $options = array())
+    {
+        $options['callable'] = $function;
+
+        parent::__construct($options);
+
+        $this->function = $function;
+    }
+
+    public function compile()
+    {
+        return $this->function;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Test/IntegrationTestCase.php b/vendor/twig/twig/lib/Twig/Test/IntegrationTestCase.php
new file mode 100644
index 00000000..724f0941
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Test/IntegrationTestCase.php
@@ -0,0 +1,154 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Integration test helper
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Karma Dordrak <drak@zikula.org>
+ */
+abstract class Twig_Test_IntegrationTestCase extends PHPUnit_Framework_TestCase
+{
+    abstract protected function getExtensions();
+    abstract protected function getFixturesDir();
+
+    /**
+     * @dataProvider getTests
+     */
+    public function testIntegration($file, $message, $condition, $templates, $exception, $outputs)
+    {
+        $this->doIntegrationTest($file, $message, $condition, $templates, $exception, $outputs);
+    }
+
+    public function getTests()
+    {
+        $fixturesDir = realpath($this->getFixturesDir());
+        $tests = array();
+
+        foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($fixturesDir), RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
+            if (!preg_match('/\.test$/', $file)) {
+                continue;
+            }
+
+            $test = file_get_contents($file->getRealpath());
+
+            if (preg_match('/
+                    --TEST--\s*(.*?)\s*(?:--CONDITION--\s*(.*))?\s*((?:--TEMPLATE(?:\(.*?\))?--(?:.*?))+)\s*(?:--DATA--\s*(.*))?\s*--EXCEPTION--\s*(.*)/sx', $test, $match)) {
+                $message = $match[1];
+                $condition = $match[2];
+                $templates = $this->parseTemplates($match[3]);
+                $exception = $match[5];
+                $outputs = array(array(null, $match[4], null, ''));
+            } elseif (preg_match('/--TEST--\s*(.*?)\s*(?:--CONDITION--\s*(.*))?\s*((?:--TEMPLATE(?:\(.*?\))?--(?:.*?))+)--DATA--.*?--EXPECT--.*/s', $test, $match)) {
+                $message = $match[1];
+                $condition = $match[2];
+                $templates = $this->parseTemplates($match[3]);
+                $exception = false;
+                preg_match_all('/--DATA--(.*?)(?:--CONFIG--(.*?))?--EXPECT--(.*?)(?=\-\-DATA\-\-|$)/s', $test, $outputs, PREG_SET_ORDER);
+            } else {
+                throw new InvalidArgumentException(sprintf('Test "%s" is not valid.', str_replace($fixturesDir.'/', '', $file)));
+            }
+
+            $tests[] = array(str_replace($fixturesDir.'/', '', $file), $message, $condition, $templates, $exception, $outputs);
+        }
+
+        return $tests;
+    }
+
+    protected function doIntegrationTest($file, $message, $condition, $templates, $exception, $outputs)
+    {
+        if ($condition) {
+            eval('$ret = '.$condition.';');
+            if (!$ret) {
+                $this->markTestSkipped($condition);
+            }
+        }
+
+        $loader = new Twig_Loader_Array($templates);
+
+        foreach ($outputs as $match) {
+            $config = array_merge(array(
+                'cache' => false,
+                'strict_variables' => true,
+            ), $match[2] ? eval($match[2].';') : array());
+            $twig = new Twig_Environment($loader, $config);
+            $twig->addGlobal('global', 'global');
+            foreach ($this->getExtensions() as $extension) {
+                $twig->addExtension($extension);
+            }
+
+            try {
+                $template = $twig->loadTemplate('index.twig');
+            } catch (Exception $e) {
+                if (false !== $exception) {
+                    $this->assertEquals(trim($exception), trim(sprintf('%s: %s', get_class($e), $e->getMessage())));
+
+                    return;
+                }
+
+                if ($e instanceof Twig_Error_Syntax) {
+                    $e->setTemplateFile($file);
+
+                    throw $e;
+                }
+
+                throw new Twig_Error(sprintf('%s: %s', get_class($e), $e->getMessage()), -1, $file, $e);
+            }
+
+            try {
+                $output = trim($template->render(eval($match[1].';')), "\n ");
+            } catch (Exception $e) {
+                if (false !== $exception) {
+                    $this->assertEquals(trim($exception), trim(sprintf('%s: %s', get_class($e), $e->getMessage())));
+
+                    return;
+                }
+
+                if ($e instanceof Twig_Error_Syntax) {
+                    $e->setTemplateFile($file);
+                } else {
+                    $e = new Twig_Error(sprintf('%s: %s', get_class($e), $e->getMessage()), -1, $file, $e);
+                }
+
+                $output = trim(sprintf('%s: %s', get_class($e), $e->getMessage()));
+            }
+
+            if (false !== $exception) {
+                list($class, ) = explode(':', $exception);
+                $this->assertThat(NULL, new PHPUnit_Framework_Constraint_Exception($class));
+            }
+
+            $expected = trim($match[3], "\n ");
+
+            if ($expected != $output) {
+                echo 'Compiled template that failed:';
+
+                foreach (array_keys($templates) as $name) {
+                    echo "Template: $name\n";
+                    $source = $loader->getSource($name);
+                    echo $twig->compile($twig->parse($twig->tokenize($source, $name)));
+                }
+            }
+            $this->assertEquals($expected, $output, $message.' (in '.$file.')');
+        }
+    }
+
+    protected static function parseTemplates($test)
+    {
+        $templates = array();
+        preg_match_all('/--TEMPLATE(?:\((.*?)\))?--(.*?)(?=\-\-TEMPLATE|$)/s', $test, $matches, PREG_SET_ORDER);
+        foreach ($matches as $match) {
+            $templates[($match[1] ? $match[1] : 'index.twig')] = $match[2];
+        }
+
+        return $templates;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Test/Method.php b/vendor/twig/twig/lib/Twig/Test/Method.php
new file mode 100644
index 00000000..17c6c041
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Test/Method.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a method template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Method extends Twig_Test
+{
+    protected $extension;
+    protected $method;
+
+    public function __construct(Twig_ExtensionInterface $extension, $method, array $options = array())
+    {
+        $options['callable'] = array($extension, $method);
+
+        parent::__construct($options);
+
+        $this->extension = $extension;
+        $this->method = $method;
+    }
+
+    public function compile()
+    {
+        return sprintf('$this->env->getExtension(\'%s\')->%s', $this->extension->getName(), $this->method);
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Test/Node.php b/vendor/twig/twig/lib/Twig/Test/Node.php
new file mode 100644
index 00000000..c832a57b
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Test/Node.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template test as a Node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Node extends Twig_Test
+{
+    protected $class;
+
+    public function __construct($class, array $options = array())
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/Test/NodeTestCase.php b/vendor/twig/twig/lib/Twig/Test/NodeTestCase.php
new file mode 100644
index 00000000..b15c85ff
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Test/NodeTestCase.php
@@ -0,0 +1,58 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Test_NodeTestCase extends PHPUnit_Framework_TestCase
+{
+    abstract public function getTests();
+
+    /**
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        $this->assertNodeCompilation($source, $node, $environment);
+    }
+
+    public function assertNodeCompilation($source, Twig_Node $node, Twig_Environment $environment = null)
+    {
+        $compiler = $this->getCompiler($environment);
+        $compiler->compile($node);
+
+        $this->assertEquals($source, trim($compiler->getSource()));
+    }
+
+    protected function getCompiler(Twig_Environment $environment = null)
+    {
+        return new Twig_Compiler(null === $environment ? $this->getEnvironment() : $environment);
+    }
+
+    protected function getEnvironment()
+    {
+        return new Twig_Environment();
+    }
+
+    protected function getVariableGetter($name)
+    {
+        if (version_compare(phpversion(), '5.4.0RC1', '>=')) {
+            return sprintf('(isset($context["%s"]) ? $context["%s"] : null)', $name, $name);
+        }
+
+        return sprintf('$this->getContext($context, "%s")', $name);
+    }
+
+    protected function getAttributeGetter()
+    {
+        if (function_exists('twig_template_get_attributes')) {
+            return 'twig_template_get_attributes($this, ';
+        }
+
+        return '$this->getAttribute(';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TestCallableInterface.php b/vendor/twig/twig/lib/Twig/TestCallableInterface.php
new file mode 100644
index 00000000..0db43682
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TestCallableInterface.php
@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a callable template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_TestCallableInterface
+{
+    public function getCallable();
+}
diff --git a/vendor/twig/twig/lib/Twig/TestInterface.php b/vendor/twig/twig/lib/Twig/TestInterface.php
new file mode 100644
index 00000000..30d8a2c4
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TestInterface.php
@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_TestInterface
+{
+    /**
+     * Compiles a test.
+     *
+     * @return string The PHP code for the test
+     */
+    public function compile();
+}
diff --git a/vendor/twig/twig/lib/Twig/Token.php b/vendor/twig/twig/lib/Twig/Token.php
new file mode 100644
index 00000000..bbca90db
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/Token.php
@@ -0,0 +1,218 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a Token.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Token
+{
+    protected $value;
+    protected $type;
+    protected $lineno;
+
+    const EOF_TYPE                  = -1;
+    const TEXT_TYPE                 = 0;
+    const BLOCK_START_TYPE          = 1;
+    const VAR_START_TYPE            = 2;
+    const BLOCK_END_TYPE            = 3;
+    const VAR_END_TYPE              = 4;
+    const NAME_TYPE                 = 5;
+    const NUMBER_TYPE               = 6;
+    const STRING_TYPE               = 7;
+    const OPERATOR_TYPE             = 8;
+    const PUNCTUATION_TYPE          = 9;
+    const INTERPOLATION_START_TYPE  = 10;
+    const INTERPOLATION_END_TYPE    = 11;
+
+    /**
+     * Constructor.
+     *
+     * @param integer $type   The type of the token
+     * @param string  $value  The token value
+     * @param integer $lineno The line position in the source
+     */
+    public function __construct($type, $value, $lineno)
+    {
+        $this->type   = $type;
+        $this->value  = $value;
+        $this->lineno = $lineno;
+    }
+
+    /**
+     * Returns a string representation of the token.
+     *
+     * @return string A string representation of the token
+     */
+    public function __toString()
+    {
+        return sprintf('%s(%s)', self::typeToString($this->type, true, $this->lineno), $this->value);
+    }
+
+    /**
+     * Tests the current token for a type and/or a value.
+     *
+     * Parameters may be:
+     * * just type
+     * * type and value (or array of possible values)
+     * * just value (or array of possible values) (NAME_TYPE is used as type)
+     *
+     * @param array|integer     $type   The type to test
+     * @param array|string|null $values The token value
+     *
+     * @return Boolean
+     */
+    public function test($type, $values = null)
+    {
+        if (null === $values && !is_int($type)) {
+            $values = $type;
+            $type = self::NAME_TYPE;
+        }
+
+        return ($this->type === $type) && (
+            null === $values ||
+            (is_array($values) && in_array($this->value, $values)) ||
+            $this->value == $values
+        );
+    }
+
+    /**
+     * Gets the line.
+     *
+     * @return integer The source line
+     */
+    public function getLine()
+    {
+        return $this->lineno;
+    }
+
+    /**
+     * Gets the token type.
+     *
+     * @return integer The token type
+     */
+    public function getType()
+    {
+        return $this->type;
+    }
+
+    /**
+     * Gets the token value.
+     *
+     * @return string The token value
+     */
+    public function getValue()
+    {
+        return $this->value;
+    }
+
+    /**
+     * Returns the constant representation (internal) of a given type.
+     *
+     * @param integer $type  The type as an integer
+     * @param Boolean $short Whether to return a short representation or not
+     * @param integer $line  The code line
+     *
+     * @return string The string representation
+     */
+    public static function typeToString($type, $short = false, $line = -1)
+    {
+        switch ($type) {
+            case self::EOF_TYPE:
+                $name = 'EOF_TYPE';
+                break;
+            case self::TEXT_TYPE:
+                $name = 'TEXT_TYPE';
+                break;
+            case self::BLOCK_START_TYPE:
+                $name = 'BLOCK_START_TYPE';
+                break;
+            case self::VAR_START_TYPE:
+                $name = 'VAR_START_TYPE';
+                break;
+            case self::BLOCK_END_TYPE:
+                $name = 'BLOCK_END_TYPE';
+                break;
+            case self::VAR_END_TYPE:
+                $name = 'VAR_END_TYPE';
+                break;
+            case self::NAME_TYPE:
+                $name = 'NAME_TYPE';
+                break;
+            case self::NUMBER_TYPE:
+                $name = 'NUMBER_TYPE';
+                break;
+            case self::STRING_TYPE:
+                $name = 'STRING_TYPE';
+                break;
+            case self::OPERATOR_TYPE:
+                $name = 'OPERATOR_TYPE';
+                break;
+            case self::PUNCTUATION_TYPE:
+                $name = 'PUNCTUATION_TYPE';
+                break;
+            case self::INTERPOLATION_START_TYPE:
+                $name = 'INTERPOLATION_START_TYPE';
+                break;
+            case self::INTERPOLATION_END_TYPE:
+                $name = 'INTERPOLATION_END_TYPE';
+                break;
+            default:
+                throw new LogicException(sprintf('Token of type "%s" does not exist.', $type));
+        }
+
+        return $short ? $name : 'Twig_Token::'.$name;
+    }
+
+    /**
+     * Returns the english representation of a given type.
+     *
+     * @param integer $type The type as an integer
+     * @param integer $line The code line
+     *
+     * @return string The string representation
+     */
+    public static function typeToEnglish($type, $line = -1)
+    {
+        switch ($type) {
+            case self::EOF_TYPE:
+                return 'end of template';
+            case self::TEXT_TYPE:
+                return 'text';
+            case self::BLOCK_START_TYPE:
+                return 'begin of statement block';
+            case self::VAR_START_TYPE:
+                return 'begin of print statement';
+            case self::BLOCK_END_TYPE:
+                return 'end of statement block';
+            case self::VAR_END_TYPE:
+                return 'end of print statement';
+            case self::NAME_TYPE:
+                return 'name';
+            case self::NUMBER_TYPE:
+                return 'number';
+            case self::STRING_TYPE:
+                return 'string';
+            case self::OPERATOR_TYPE:
+                return 'operator';
+            case self::PUNCTUATION_TYPE:
+                return 'punctuation';
+            case self::INTERPOLATION_START_TYPE:
+                return 'begin of string interpolation';
+            case self::INTERPOLATION_END_TYPE:
+                return 'end of string interpolation';
+            default:
+                throw new LogicException(sprintf('Token of type "%s" does not exist.', $type));
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser.php b/vendor/twig/twig/lib/Twig/TokenParser.php
new file mode 100644
index 00000000..decebd5e
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Base class for all token parsers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Twig_TokenParser implements Twig_TokenParserInterface
+{
+    /**
+     * @var Twig_Parser
+     */
+    protected $parser;
+
+    /**
+     * Sets the parser associated with this token parser
+     *
+     * @param $parser A Twig_Parser instance
+     */
+    public function setParser(Twig_Parser $parser)
+    {
+        $this->parser = $parser;
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/AutoEscape.php b/vendor/twig/twig/lib/Twig/TokenParser/AutoEscape.php
new file mode 100644
index 00000000..27560288
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/AutoEscape.php
@@ -0,0 +1,89 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a section of a template to be escaped or not.
+ *
+ * <pre>
+ * {% autoescape true %}
+ *   Everything will be automatically escaped in this block
+ * {% endautoescape %}
+ *
+ * {% autoescape false %}
+ *   Everything will be outputed as is in this block
+ * {% endautoescape %}
+ *
+ * {% autoescape true js %}
+ *   Everything will be automatically escaped in this block
+ *   using the js escaping strategy
+ * {% endautoescape %}
+ * </pre>
+ */
+class Twig_TokenParser_AutoEscape extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+
+        if ($stream->test(Twig_Token::BLOCK_END_TYPE)) {
+            $value = 'html';
+        } else {
+            $expr = $this->parser->getExpressionParser()->parseExpression();
+            if (!$expr instanceof Twig_Node_Expression_Constant) {
+                throw new Twig_Error_Syntax('An escaping strategy must be a string or a Boolean.', $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+            $value = $expr->getAttribute('value');
+
+            $compat = true === $value || false === $value;
+
+            if (true === $value) {
+                $value = 'html';
+            }
+
+            if ($compat && $stream->test(Twig_Token::NAME_TYPE)) {
+                if (false === $value) {
+                    throw new Twig_Error_Syntax('Unexpected escaping strategy as you set autoescaping to false.', $stream->getCurrent()->getLine(), $stream->getFilename());
+                }
+
+                $value = $stream->next()->getValue();
+            }
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_AutoEscape($value, $body, $lineno, $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endautoescape');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'autoescape';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Block.php b/vendor/twig/twig/lib/Twig/TokenParser/Block.php
new file mode 100644
index 00000000..a2e017f3
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Block.php
@@ -0,0 +1,83 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a section of a template as being reusable.
+ *
+ * <pre>
+ *  {% block head %}
+ *    <link rel="stylesheet" href="style.css" />
+ *    <title>{% block title %}{% endblock %} - My Webpage</title>
+ *  {% endblock %}
+ * </pre>
+ */
+class Twig_TokenParser_Block extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+        if ($this->parser->hasBlock($name)) {
+            throw new Twig_Error_Syntax(sprintf("The block '$name' has already been defined line %d", $this->parser->getBlock($name)->getLine()), $stream->getCurrent()->getLine(), $stream->getFilename());
+        }
+        $this->parser->setBlock($name, $block = new Twig_Node_Block($name, new Twig_Node(array()), $lineno));
+        $this->parser->pushLocalScope();
+        $this->parser->pushBlockStack($name);
+
+        if ($stream->test(Twig_Token::BLOCK_END_TYPE)) {
+            $stream->next();
+
+            $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+            if ($stream->test(Twig_Token::NAME_TYPE)) {
+                $value = $stream->next()->getValue();
+
+                if ($value != $name) {
+                    throw new Twig_Error_Syntax(sprintf("Expected endblock for block '$name' (but %s given)", $value), $stream->getCurrent()->getLine(), $stream->getFilename());
+                }
+            }
+        } else {
+            $body = new Twig_Node(array(
+                new Twig_Node_Print($this->parser->getExpressionParser()->parseExpression(), $lineno),
+            ));
+        }
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $block->setNode('body', $body);
+        $this->parser->popBlockStack();
+        $this->parser->popLocalScope();
+
+        return new Twig_Node_BlockReference($name, $lineno, $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endblock');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'block';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Do.php b/vendor/twig/twig/lib/Twig/TokenParser/Do.php
new file mode 100644
index 00000000..f50939dd
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Do.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Evaluates an expression, discarding the returned value.
+ */
+class Twig_TokenParser_Do extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $expr = $this->parser->getExpressionParser()->parseExpression();
+
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Do($expr, $token->getLine(), $this->getTag());
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'do';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Embed.php b/vendor/twig/twig/lib/Twig/TokenParser/Embed.php
new file mode 100644
index 00000000..69cb5f35
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Embed.php
@@ -0,0 +1,66 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Embeds a template.
+ */
+class Twig_TokenParser_Embed extends Twig_TokenParser_Include
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $stream = $this->parser->getStream();
+
+        $parent = $this->parser->getExpressionParser()->parseExpression();
+
+        list($variables, $only, $ignoreMissing) = $this->parseArguments();
+
+        // inject a fake parent to make the parent() function work
+        $stream->injectTokens(array(
+            new Twig_Token(Twig_Token::BLOCK_START_TYPE, '', $token->getLine()),
+            new Twig_Token(Twig_Token::NAME_TYPE, 'extends', $token->getLine()),
+            new Twig_Token(Twig_Token::STRING_TYPE, '__parent__', $token->getLine()),
+            new Twig_Token(Twig_Token::BLOCK_END_TYPE, '', $token->getLine()),
+        ));
+
+        $module = $this->parser->parse($stream, array($this, 'decideBlockEnd'), true);
+
+        // override the parent with the correct one
+        $module->setNode('parent', $parent);
+
+        $this->parser->embedTemplate($module);
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Embed($module->getAttribute('filename'), $module->getAttribute('index'), $variables, $only, $ignoreMissing, $token->getLine(), $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endembed');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'embed';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Extends.php b/vendor/twig/twig/lib/Twig/TokenParser/Extends.php
new file mode 100644
index 00000000..f5ecee21
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Extends.php
@@ -0,0 +1,52 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Extends a template by another one.
+ *
+ * <pre>
+ *  {% extends "base.html" %}
+ * </pre>
+ */
+class Twig_TokenParser_Extends extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        if (!$this->parser->isMainScope()) {
+            throw new Twig_Error_Syntax('Cannot extend from a block', $token->getLine(), $this->parser->getFilename());
+        }
+
+        if (null !== $this->parser->getParent()) {
+            throw new Twig_Error_Syntax('Multiple extends tags are forbidden', $token->getLine(), $this->parser->getFilename());
+        }
+        $this->parser->setParent($this->parser->getExpressionParser()->parseExpression());
+
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'extends';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Filter.php b/vendor/twig/twig/lib/Twig/TokenParser/Filter.php
new file mode 100644
index 00000000..2b97475a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Filter.php
@@ -0,0 +1,61 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Filters a section of a template by applying filters.
+ *
+ * <pre>
+ * {% filter upper %}
+ *  This text becomes uppercase
+ * {% endfilter %}
+ * </pre>
+ */
+class Twig_TokenParser_Filter extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $name = $this->parser->getVarName();
+        $ref = new Twig_Node_Expression_BlockReference(new Twig_Node_Expression_Constant($name, $token->getLine()), true, $token->getLine(), $this->getTag());
+
+        $filter = $this->parser->getExpressionParser()->parseFilterExpressionRaw($ref, $this->getTag());
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $block = new Twig_Node_Block($name, $body, $token->getLine());
+        $this->parser->setBlock($name, $block);
+
+        return new Twig_Node_Print($filter, $token->getLine(), $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endfilter');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'filter';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Flush.php b/vendor/twig/twig/lib/Twig/TokenParser/Flush.php
new file mode 100644
index 00000000..4e15e785
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Flush.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Flushes the output to the client.
+ *
+ * @see flush()
+ */
+class Twig_TokenParser_Flush extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Flush($token->getLine(), $this->getTag());
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'flush';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/For.php b/vendor/twig/twig/lib/Twig/TokenParser/For.php
new file mode 100644
index 00000000..98a6d079
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/For.php
@@ -0,0 +1,136 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loops over each item of a sequence.
+ *
+ * <pre>
+ * <ul>
+ *  {% for user in users %}
+ *    <li>{{ user.username|e }}</li>
+ *  {% endfor %}
+ * </ul>
+ * </pre>
+ */
+class Twig_TokenParser_For extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $targets = $this->parser->getExpressionParser()->parseAssignmentExpression();
+        $stream->expect(Twig_Token::OPERATOR_TYPE, 'in');
+        $seq = $this->parser->getExpressionParser()->parseExpression();
+
+        $ifexpr = null;
+        if ($stream->test(Twig_Token::NAME_TYPE, 'if')) {
+            $stream->next();
+            $ifexpr = $this->parser->getExpressionParser()->parseExpression();
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideForFork'));
+        if ($stream->next()->getValue() == 'else') {
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+            $else = $this->parser->subparse(array($this, 'decideForEnd'), true);
+        } else {
+            $else = null;
+        }
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        if (count($targets) > 1) {
+            $keyTarget = $targets->getNode(0);
+            $keyTarget = new Twig_Node_Expression_AssignName($keyTarget->getAttribute('name'), $keyTarget->getLine());
+            $valueTarget = $targets->getNode(1);
+            $valueTarget = new Twig_Node_Expression_AssignName($valueTarget->getAttribute('name'), $valueTarget->getLine());
+        } else {
+            $keyTarget = new Twig_Node_Expression_AssignName('_key', $lineno);
+            $valueTarget = $targets->getNode(0);
+            $valueTarget = new Twig_Node_Expression_AssignName($valueTarget->getAttribute('name'), $valueTarget->getLine());
+        }
+
+        if ($ifexpr) {
+            $this->checkLoopUsageCondition($stream, $ifexpr);
+            $this->checkLoopUsageBody($stream, $body);
+        }
+
+        return new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, $lineno, $this->getTag());
+    }
+
+    public function decideForFork(Twig_Token $token)
+    {
+        return $token->test(array('else', 'endfor'));
+    }
+
+    public function decideForEnd(Twig_Token $token)
+    {
+        return $token->test('endfor');
+    }
+
+    // the loop variable cannot be used in the condition
+    protected function checkLoopUsageCondition(Twig_TokenStream $stream, Twig_NodeInterface $node)
+    {
+        if ($node instanceof Twig_Node_Expression_GetAttr && $node->getNode('node') instanceof Twig_Node_Expression_Name && 'loop' == $node->getNode('node')->getAttribute('name')) {
+            throw new Twig_Error_Syntax('The "loop" variable cannot be used in a looping condition', $node->getLine(), $stream->getFilename());
+        }
+
+        foreach ($node as $n) {
+            if (!$n) {
+                continue;
+            }
+
+            $this->checkLoopUsageCondition($stream, $n);
+        }
+    }
+
+    // check usage of non-defined loop-items
+    // it does not catch all problems (for instance when a for is included into another or when the variable is used in an include)
+    protected function checkLoopUsageBody(Twig_TokenStream $stream, Twig_NodeInterface $node)
+    {
+        if ($node instanceof Twig_Node_Expression_GetAttr && $node->getNode('node') instanceof Twig_Node_Expression_Name && 'loop' == $node->getNode('node')->getAttribute('name')) {
+            $attribute = $node->getNode('attribute');
+            if ($attribute instanceof Twig_Node_Expression_Constant && in_array($attribute->getAttribute('value'), array('length', 'revindex0', 'revindex', 'last'))) {
+                throw new Twig_Error_Syntax(sprintf('The "loop.%s" variable is not defined when looping with a condition', $attribute->getAttribute('value')), $node->getLine(), $stream->getFilename());
+            }
+        }
+
+        // should check for parent.loop.XXX usage
+        if ($node instanceof Twig_Node_For) {
+            return;
+        }
+
+        foreach ($node as $n) {
+            if (!$n) {
+                continue;
+            }
+
+            $this->checkLoopUsageBody($stream, $n);
+        }
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'for';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/From.php b/vendor/twig/twig/lib/Twig/TokenParser/From.php
new file mode 100644
index 00000000..a54054db
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/From.php
@@ -0,0 +1,74 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Imports macros.
+ *
+ * <pre>
+ *   {% from 'forms.html' import forms %}
+ * </pre>
+ */
+class Twig_TokenParser_From extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $macro = $this->parser->getExpressionParser()->parseExpression();
+        $stream = $this->parser->getStream();
+        $stream->expect('import');
+
+        $targets = array();
+        do {
+            $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+
+            $alias = $name;
+            if ($stream->test('as')) {
+                $stream->next();
+
+                $alias = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+            }
+
+            $targets[$name] = $alias;
+
+            if (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                break;
+            }
+
+            $stream->next();
+        } while (true);
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $node = new Twig_Node_Import($macro, new Twig_Node_Expression_AssignName($this->parser->getVarName(), $token->getLine()), $token->getLine(), $this->getTag());
+
+        foreach ($targets as $name => $alias) {
+            $this->parser->addImportedSymbol('function', $alias, 'get'.$name, $node->getNode('var'));
+        }
+
+        return $node;
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'from';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/If.php b/vendor/twig/twig/lib/Twig/TokenParser/If.php
new file mode 100644
index 00000000..3d7d1f51
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/If.php
@@ -0,0 +1,94 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Tests a condition.
+ *
+ * <pre>
+ * {% if users %}
+ *  <ul>
+ *    {% for user in users %}
+ *      <li>{{ user.username|e }}</li>
+ *    {% endfor %}
+ *  </ul>
+ * {% endif %}
+ * </pre>
+ */
+class Twig_TokenParser_If extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $expr = $this->parser->getExpressionParser()->parseExpression();
+        $stream = $this->parser->getStream();
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideIfFork'));
+        $tests = array($expr, $body);
+        $else = null;
+
+        $end = false;
+        while (!$end) {
+            switch ($stream->next()->getValue()) {
+                case 'else':
+                    $stream->expect(Twig_Token::BLOCK_END_TYPE);
+                    $else = $this->parser->subparse(array($this, 'decideIfEnd'));
+                    break;
+
+                case 'elseif':
+                    $expr = $this->parser->getExpressionParser()->parseExpression();
+                    $stream->expect(Twig_Token::BLOCK_END_TYPE);
+                    $body = $this->parser->subparse(array($this, 'decideIfFork'));
+                    $tests[] = $expr;
+                    $tests[] = $body;
+                    break;
+
+                case 'endif':
+                    $end = true;
+                    break;
+
+                default:
+                    throw new Twig_Error_Syntax(sprintf('Unexpected end of template. Twig was looking for the following tags "else", "elseif", or "endif" to close the "if" block started at line %d)', $lineno), $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_If(new Twig_Node($tests), $else, $lineno, $this->getTag());
+    }
+
+    public function decideIfFork(Twig_Token $token)
+    {
+        return $token->test(array('elseif', 'else', 'endif'));
+    }
+
+    public function decideIfEnd(Twig_Token $token)
+    {
+        return $token->test(array('endif'));
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'if';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Import.php b/vendor/twig/twig/lib/Twig/TokenParser/Import.php
new file mode 100644
index 00000000..e7050c70
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Import.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Imports macros.
+ *
+ * <pre>
+ *   {% import 'forms.html' as forms %}
+ * </pre>
+ */
+class Twig_TokenParser_Import extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $macro = $this->parser->getExpressionParser()->parseExpression();
+        $this->parser->getStream()->expect('as');
+        $var = new Twig_Node_Expression_AssignName($this->parser->getStream()->expect(Twig_Token::NAME_TYPE)->getValue(), $token->getLine());
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $this->parser->addImportedSymbol('template', $var->getAttribute('name'));
+
+        return new Twig_Node_Import($macro, $var, $token->getLine(), $this->getTag());
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'import';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Include.php b/vendor/twig/twig/lib/Twig/TokenParser/Include.php
new file mode 100644
index 00000000..4a317868
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Include.php
@@ -0,0 +1,80 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Includes a template.
+ *
+ * <pre>
+ *   {% include 'header.html' %}
+ *     Body
+ *   {% include 'footer.html' %}
+ * </pre>
+ */
+class Twig_TokenParser_Include extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $expr = $this->parser->getExpressionParser()->parseExpression();
+
+        list($variables, $only, $ignoreMissing) = $this->parseArguments();
+
+        return new Twig_Node_Include($expr, $variables, $only, $ignoreMissing, $token->getLine(), $this->getTag());
+    }
+
+    protected function parseArguments()
+    {
+        $stream = $this->parser->getStream();
+
+        $ignoreMissing = false;
+        if ($stream->test(Twig_Token::NAME_TYPE, 'ignore')) {
+            $stream->next();
+            $stream->expect(Twig_Token::NAME_TYPE, 'missing');
+
+            $ignoreMissing = true;
+        }
+
+        $variables = null;
+        if ($stream->test(Twig_Token::NAME_TYPE, 'with')) {
+            $stream->next();
+
+            $variables = $this->parser->getExpressionParser()->parseExpression();
+        }
+
+        $only = false;
+        if ($stream->test(Twig_Token::NAME_TYPE, 'only')) {
+            $stream->next();
+
+            $only = true;
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return array($variables, $only, $ignoreMissing);
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'include';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Macro.php b/vendor/twig/twig/lib/Twig/TokenParser/Macro.php
new file mode 100644
index 00000000..82b4fa6d
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Macro.php
@@ -0,0 +1,68 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Defines a macro.
+ *
+ * <pre>
+ * {% macro input(name, value, type, size) %}
+ *    <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />
+ * {% endmacro %}
+ * </pre>
+ */
+class Twig_TokenParser_Macro extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+
+        $arguments = $this->parser->getExpressionParser()->parseArguments(true, true);
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $this->parser->pushLocalScope();
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        if ($stream->test(Twig_Token::NAME_TYPE)) {
+            $value = $stream->next()->getValue();
+
+            if ($value != $name) {
+                throw new Twig_Error_Syntax(sprintf("Expected endmacro for macro '$name' (but %s given)", $value), $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+        }
+        $this->parser->popLocalScope();
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $this->parser->setMacro($name, new Twig_Node_Macro($name, new Twig_Node_Body(array($body)), $arguments, $lineno, $this->getTag()));
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endmacro');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'macro';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Sandbox.php b/vendor/twig/twig/lib/Twig/TokenParser/Sandbox.php
new file mode 100644
index 00000000..9457325a
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Sandbox.php
@@ -0,0 +1,68 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a section of a template as untrusted code that must be evaluated in the sandbox mode.
+ *
+ * <pre>
+ * {% sandbox %}
+ *     {% include 'user.html' %}
+ * {% endsandbox %}
+ * </pre>
+ *
+ * @see http://www.twig-project.org/doc/api.html#sandbox-extension for details
+ */
+class Twig_TokenParser_Sandbox extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        // in a sandbox tag, only include tags are allowed
+        if (!$body instanceof Twig_Node_Include) {
+            foreach ($body as $node) {
+                if ($node instanceof Twig_Node_Text && ctype_space($node->getAttribute('data'))) {
+                    continue;
+                }
+
+                if (!$node instanceof Twig_Node_Include) {
+                    throw new Twig_Error_Syntax('Only "include" tags are allowed within a "sandbox" section', $node->getLine(), $this->parser->getFilename());
+                }
+            }
+        }
+
+        return new Twig_Node_Sandbox($body, $token->getLine(), $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endsandbox');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'sandbox';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Set.php b/vendor/twig/twig/lib/Twig/TokenParser/Set.php
new file mode 100644
index 00000000..70e0b41b
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Set.php
@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Defines a variable.
+ *
+ * <pre>
+ *  {% set foo = 'foo' %}
+ *
+ *  {% set foo = [1, 2] %}
+ *
+ *  {% set foo = {'foo': 'bar'} %}
+ *
+ *  {% set foo = 'foo' ~ 'bar' %}
+ *
+ *  {% set foo, bar = 'foo', 'bar' %}
+ *
+ *  {% set foo %}Some content{% endset %}
+ * </pre>
+ */
+class Twig_TokenParser_Set extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $names = $this->parser->getExpressionParser()->parseAssignmentExpression();
+
+        $capture = false;
+        if ($stream->test(Twig_Token::OPERATOR_TYPE, '=')) {
+            $stream->next();
+            $values = $this->parser->getExpressionParser()->parseMultitargetExpression();
+
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+            if (count($names) !== count($values)) {
+                throw new Twig_Error_Syntax("When using set, you must have the same number of variables and assignments.", $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+        } else {
+            $capture = true;
+
+            if (count($names) > 1) {
+                throw new Twig_Error_Syntax("When using set with a block, you cannot have a multi-target.", $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+            $values = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        }
+
+        return new Twig_Node_Set($capture, $names, $values, $lineno, $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endset');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'set';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Spaceless.php b/vendor/twig/twig/lib/Twig/TokenParser/Spaceless.php
new file mode 100644
index 00000000..1e3fa8f3
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Spaceless.php
@@ -0,0 +1,59 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Remove whitespaces between HTML tags.
+ *
+ * <pre>
+ * {% spaceless %}
+ *      <div>
+ *          <strong>foo</strong>
+ *      </div>
+ * {% endspaceless %}
+ *
+ * {# output will be <div><strong>foo</strong></div> #}
+ * </pre>
+ */
+class Twig_TokenParser_Spaceless extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideSpacelessEnd'), true);
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Spaceless($body, $lineno, $this->getTag());
+    }
+
+    public function decideSpacelessEnd(Twig_Token $token)
+    {
+        return $token->test('endspaceless');
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'spaceless';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParser/Use.php b/vendor/twig/twig/lib/Twig/TokenParser/Use.php
new file mode 100644
index 00000000..bc0e09ef
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParser/Use.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Imports blocks defined in another template into the current template.
+ *
+ * <pre>
+ * {% extends "base.html" %}
+ *
+ * {% use "blocks.html" %}
+ *
+ * {% block title %}{% endblock %}
+ * {% block content %}{% endblock %}
+ * </pre>
+ *
+ * @see http://www.twig-project.org/doc/templates.html#horizontal-reuse for details.
+ */
+class Twig_TokenParser_Use extends Twig_TokenParser
+{
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token)
+    {
+        $template = $this->parser->getExpressionParser()->parseExpression();
+        $stream = $this->parser->getStream();
+
+        if (!$template instanceof Twig_Node_Expression_Constant) {
+            throw new Twig_Error_Syntax('The template references in a "use" statement must be a string.', $stream->getCurrent()->getLine(), $stream->getFilename());
+        }
+
+        $targets = array();
+        if ($stream->test('with')) {
+            $stream->next();
+
+            do {
+                $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+
+                $alias = $name;
+                if ($stream->test('as')) {
+                    $stream->next();
+
+                    $alias = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+                }
+
+                $targets[$name] = new Twig_Node_Expression_Constant($alias, -1);
+
+                if (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                    break;
+                }
+
+                $stream->next();
+            } while (true);
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $this->parser->addTrait(new Twig_Node(array('template' => $template, 'targets' => new Twig_Node($targets))));
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'use';
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParserBroker.php b/vendor/twig/twig/lib/Twig/TokenParserBroker.php
new file mode 100644
index 00000000..ec3fba67
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParserBroker.php
@@ -0,0 +1,136 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default implementation of a token parser broker.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_TokenParserBroker implements Twig_TokenParserBrokerInterface
+{
+    protected $parser;
+    protected $parsers = array();
+    protected $brokers = array();
+
+    /**
+     * Constructor.
+     *
+     * @param array|Traversable $parsers A Traversable of Twig_TokenParserInterface instances
+     * @param array|Traversable $brokers A Traversable of Twig_TokenParserBrokerInterface instances
+     */
+    public function __construct($parsers = array(), $brokers = array())
+    {
+        foreach ($parsers as $parser) {
+            if (!$parser instanceof Twig_TokenParserInterface) {
+                throw new LogicException('$parsers must a an array of Twig_TokenParserInterface');
+            }
+            $this->parsers[$parser->getTag()] = $parser;
+        }
+        foreach ($brokers as $broker) {
+            if (!$broker instanceof Twig_TokenParserBrokerInterface) {
+                throw new LogicException('$brokers must a an array of Twig_TokenParserBrokerInterface');
+            }
+            $this->brokers[] = $broker;
+        }
+    }
+
+    /**
+     * Adds a TokenParser.
+     *
+     * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
+     */
+    public function addTokenParser(Twig_TokenParserInterface $parser)
+    {
+        $this->parsers[$parser->getTag()] = $parser;
+    }
+
+    /**
+     * Removes a TokenParser.
+     *
+     * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
+     */
+    public function removeTokenParser(Twig_TokenParserInterface $parser)
+    {
+        $name = $parser->getTag();
+        if (isset($this->parsers[$name]) && $parser === $this->parsers[$name]) {
+            unset($this->parsers[$name]);
+        }
+    }
+
+    /**
+     * Adds a TokenParserBroker.
+     *
+     * @param Twig_TokenParserBroker $broker A Twig_TokenParserBroker instance
+     */
+    public function addTokenParserBroker(Twig_TokenParserBroker $broker)
+    {
+        $this->brokers[] = $broker;
+    }
+
+    /**
+     * Removes a TokenParserBroker.
+     *
+     * @param Twig_TokenParserBroker $broker A Twig_TokenParserBroker instance
+     */
+    public function removeTokenParserBroker(Twig_TokenParserBroker $broker)
+    {
+        if (false !== $pos = array_search($broker, $this->brokers)) {
+            unset($this->brokers[$pos]);
+        }
+    }
+
+    /**
+     * Gets a suitable TokenParser for a tag.
+     *
+     * First looks in parsers, then in brokers.
+     *
+     * @param string $tag A tag name
+     *
+     * @return null|Twig_TokenParserInterface A Twig_TokenParserInterface or null if no suitable TokenParser was found
+     */
+    public function getTokenParser($tag)
+    {
+        if (isset($this->parsers[$tag])) {
+            return $this->parsers[$tag];
+        }
+        $broker = end($this->brokers);
+        while (false !== $broker) {
+            $parser = $broker->getTokenParser($tag);
+            if (null !== $parser) {
+                return $parser;
+            }
+            $broker = prev($this->brokers);
+        }
+    }
+
+    public function getParsers()
+    {
+        return $this->parsers;
+    }
+
+    public function getParser()
+    {
+        return $this->parser;
+    }
+
+    public function setParser(Twig_ParserInterface $parser)
+    {
+        $this->parser = $parser;
+        foreach ($this->parsers as $tokenParser) {
+            $tokenParser->setParser($parser);
+        }
+        foreach ($this->brokers as $broker) {
+            $broker->setParser($parser);
+        }
+    }
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParserBrokerInterface.php b/vendor/twig/twig/lib/Twig/TokenParserBrokerInterface.php
new file mode 100644
index 00000000..3f006e33
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParserBrokerInterface.php
@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by token parser brokers.
+ *
+ * Token parser brokers allows to implement custom logic in the process of resolving a token parser for a given tag name.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_TokenParserBrokerInterface
+{
+    /**
+     * Gets a TokenParser suitable for a tag.
+     *
+     * @param string $tag A tag name
+     *
+     * @return null|Twig_TokenParserInterface A Twig_TokenParserInterface or null if no suitable TokenParser was found
+     */
+    public function getTokenParser($tag);
+
+    /**
+     * Calls Twig_TokenParserInterface::setParser on all parsers the implementation knows of.
+     *
+     * @param Twig_ParserInterface $parser A Twig_ParserInterface interface
+     */
+    public function setParser(Twig_ParserInterface $parser);
+
+    /**
+     * Gets the Twig_ParserInterface.
+     *
+     * @return null|Twig_ParserInterface A Twig_ParserInterface instance or null
+     */
+    public function getParser();
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenParserInterface.php b/vendor/twig/twig/lib/Twig/TokenParserInterface.php
new file mode 100644
index 00000000..bbde7714
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenParserInterface.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by token parsers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_TokenParserInterface
+{
+    /**
+     * Sets the parser associated with this token parser
+     *
+     * @param $parser A Twig_Parser instance
+     */
+    public function setParser(Twig_Parser $parser);
+
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     */
+    public function parse(Twig_Token $token);
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag();
+}
diff --git a/vendor/twig/twig/lib/Twig/TokenStream.php b/vendor/twig/twig/lib/Twig/TokenStream.php
new file mode 100644
index 00000000..a78189f6
--- /dev/null
+++ b/vendor/twig/twig/lib/Twig/TokenStream.php
@@ -0,0 +1,144 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a token stream.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_TokenStream
+{
+    protected $tokens;
+    protected $current;
+    protected $filename;
+
+    /**
+     * Constructor.
+     *
+     * @param array  $tokens   An array of tokens
+     * @param string $filename The name of the filename which tokens are associated with
+     */
+    public function __construct(array $tokens, $filename = null)
+    {
+        $this->tokens     = $tokens;
+        $this->current    = 0;
+        $this->filename   = $filename;
+    }
+
+    /**
+     * Returns a string representation of the token stream.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return implode("\n", $this->tokens);
+    }
+
+    public function injectTokens(array $tokens)
+    {
+        $this->tokens = array_merge(array_slice($this->tokens, 0, $this->current), $tokens, array_slice($this->tokens, $this->current));
+    }
+
+    /**
+     * Sets the pointer to the next token and returns the old one.
+     *
+     * @return Twig_Token
+     */
+    public function next()
+    {
+        if (!isset($this->tokens[++$this->current])) {
+            throw new Twig_Error_Syntax('Unexpected end of template', $this->tokens[$this->current - 1]->getLine(), $this->filename);
+        }
+
+        return $this->tokens[$this->current - 1];
+    }
+
+    /**
+     * Tests a token and returns it or throws a syntax error.
+     *
+     * @return Twig_Token
+     */
+    public function expect($type, $value = null, $message = null)
+    {
+        $token = $this->tokens[$this->current];
+        if (!$token->test($type, $value)) {
+            $line = $token->getLine();
+            throw new Twig_Error_Syntax(sprintf('%sUnexpected token "%s" of value "%s" ("%s" expected%s)',
+                $message ? $message.'. ' : '',
+                Twig_Token::typeToEnglish($token->getType(), $line), $token->getValue(),
+                Twig_Token::typeToEnglish($type, $line), $value ? sprintf(' with value "%s"', $value) : ''),
+                $line,
+                $this->filename
+            );
+        }
+        $this->next();
+
+        return $token;
+    }
+
+    /**
+     * Looks at the next token.
+     *
+     * @param integer $number
+     *
+     * @return Twig_Token
+     */
+    public function look($number = 1)
+    {
+        if (!isset($this->tokens[$this->current + $number])) {
+            throw new Twig_Error_Syntax('Unexpected end of template', $this->tokens[$this->current + $number - 1]->getLine(), $this->filename);
+        }
+
+        return $this->tokens[$this->current + $number];
+    }
+
+    /**
+     * Tests the current token
+     *
+     * @return bool
+     */
+    public function test($primary, $secondary = null)
+    {
+        return $this->tokens[$this->current]->test($primary, $secondary);
+    }
+
+    /**
+     * Checks if end of stream was reached
+     *
+     * @return bool
+     */
+    public function isEOF()
+    {
+        return $this->tokens[$this->current]->getType() === Twig_Token::EOF_TYPE;
+    }
+
+    /**
+     * Gets the current token
+     *
+     * @return Twig_Token
+     */
+    public function getCurrent()
+    {
+        return $this->tokens[$this->current];
+    }
+
+    /**
+     * Gets the filename associated with this stream
+     *
+     * @return string
+     */
+    public function getFilename()
+    {
+        return $this->filename;
+    }
+}
diff --git a/vendor/twig/twig/phpunit.xml.dist b/vendor/twig/twig/phpunit.xml.dist
new file mode 100644
index 00000000..6c5046f1
--- /dev/null
+++ b/vendor/twig/twig/phpunit.xml.dist
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         syntaxCheck="false"
+         bootstrap="test/bootstrap.php"
+>
+  <testsuites>
+    <testsuite name="Twig Test Suite">
+      <directory>./test/Twig/</directory>
+    </testsuite>
+  </testsuites>
+
+  <filter>
+    <whitelist>
+      <directory suffix=".php">./lib/Twig/</directory>
+    </whitelist>
+  </filter>
+</phpunit>
diff --git a/vendor/twig/twig/test/Twig/Tests/AutoloaderTest.php b/vendor/twig/twig/test/Twig/Tests/AutoloaderTest.php
new file mode 100644
index 00000000..c8b7999a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/AutoloaderTest.php
@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_AutoloaderTest extends PHPUnit_Framework_TestCase
+{
+    public function testAutoload()
+    {
+        $this->assertFalse(class_exists('FooBarFoo'), '->autoload() does not try to load classes that does not begin with Twig');
+
+        $autoloader = new Twig_Autoloader();
+        $this->assertNull($autoloader->autoload('Foo'), '->autoload() returns false if it is not able to load a class');
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/CompilerTest.php b/vendor/twig/twig/test/Twig/Tests/CompilerTest.php
new file mode 100644
index 00000000..ebe79aef
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/CompilerTest.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_CompilerTest extends PHPUnit_Framework_TestCase
+{
+    public function testReprNumericValueWithLocale()
+    {
+        $compiler = new Twig_Compiler(new Twig_Environment());
+
+        $locale = setlocale(LC_NUMERIC, 0);
+        if (false === $locale) {
+            $this->markTestSkipped('Your platform does not support locales.');
+        }
+
+        $required_locales = array('fr_FR.UTF-8', 'fr_FR.UTF8', 'fr_FR.utf-8', 'fr_FR.utf8', 'French_France.1252');
+        if (false === setlocale(LC_ALL, $required_locales)) {
+            $this->markTestSkipped('Could not set any of required locales: ' . implode(", ", $required_locales));
+        }
+
+        $this->assertEquals('1.2', $compiler->repr(1.2)->getSource());
+        $this->assertContains('fr', strtolower(setlocale(LC_NUMERIC, 0)));
+
+        setlocale(LC_ALL, $locale);
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/EnvironmentTest.php b/vendor/twig/twig/test/Twig/Tests/EnvironmentTest.php
new file mode 100644
index 00000000..22461b5d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/EnvironmentTest.php
@@ -0,0 +1,288 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_EnvironmentTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @expectedException        LogicException
+     * @expectedExceptionMessage You must set a loader first.
+     */
+    public function testRenderNoLoader()
+    {
+        $env = new Twig_Environment();
+        $env->render('test');
+    }
+
+    public function testAutoescapeOption()
+    {
+        $loader = new Twig_Loader_Array(array(
+            'html' => '{{ foo }} {{ foo }}',
+            'js'   => '{{ bar }} {{ bar }}',
+        ));
+
+        $twig = new Twig_Environment($loader, array(
+            'debug'      => true,
+            'cache'      => false,
+            'autoescape' => array($this, 'escapingStrategyCallback'),
+        ));
+
+        $this->assertEquals('foo&lt;br/ &gt; foo&lt;br/ &gt;', $twig->render('html', array('foo' => 'foo<br/ >')));
+        $this->assertEquals('foo\x3Cbr\x2F\x20\x3E foo\x3Cbr\x2F\x20\x3E', $twig->render('js', array('bar' => 'foo<br/ >')));
+    }
+
+    public function escapingStrategyCallback($filename)
+    {
+        return $filename;
+    }
+
+    public function testGlobals()
+    {
+        // globals can be added after calling getGlobals
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addGlobal('foo', 'foo');
+        $globals = $twig->getGlobals();
+        $twig->addGlobal('foo', 'bar');
+        $globals = $twig->getGlobals();
+        $this->assertEquals('bar', $globals['foo']);
+
+        // globals can be modified after runtime init
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addGlobal('foo', 'foo');
+        $globals = $twig->getGlobals();
+        $twig->initRuntime();
+        $twig->addGlobal('foo', 'bar');
+        $globals = $twig->getGlobals();
+        $this->assertEquals('bar', $globals['foo']);
+
+        // globals can be modified after extensions init
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addGlobal('foo', 'foo');
+        $globals = $twig->getGlobals();
+        $twig->getFunctions();
+        $twig->addGlobal('foo', 'bar');
+        $globals = $twig->getGlobals();
+        $this->assertEquals('bar', $globals['foo']);
+
+        // globals can be modified after extensions and runtime init
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addGlobal('foo', 'foo');
+        $globals = $twig->getGlobals();
+        $twig->getFunctions();
+        $twig->initRuntime();
+        $twig->addGlobal('foo', 'bar');
+        $globals = $twig->getGlobals();
+        $this->assertEquals('bar', $globals['foo']);
+
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->getGlobals();
+        $twig->addGlobal('foo', 'bar');
+        $template = $twig->loadTemplate('{{foo}}');
+        $this->assertEquals('bar', $template->render(array()));
+
+        /* to be uncomment in Twig 2.0
+        // globals cannot be added after runtime init
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addGlobal('foo', 'foo');
+        $globals = $twig->getGlobals();
+        $twig->initRuntime();
+        try {
+            $twig->addGlobal('bar', 'bar');
+            $this->fail();
+        } catch (LogicException $e) {
+            $this->assertFalse(array_key_exists('bar', $twig->getGlobals()));
+        }
+
+        // globals cannot be added after extensions init
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addGlobal('foo', 'foo');
+        $globals = $twig->getGlobals();
+        $twig->getFunctions();
+        try {
+            $twig->addGlobal('bar', 'bar');
+            $this->fail();
+        } catch (LogicException $e) {
+            $this->assertFalse(array_key_exists('bar', $twig->getGlobals()));
+        }
+
+        // globals cannot be added after extensions and runtime init
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addGlobal('foo', 'foo');
+        $globals = $twig->getGlobals();
+        $twig->getFunctions();
+        $twig->initRuntime();
+        try {
+            $twig->addGlobal('bar', 'bar');
+            $this->fail();
+        } catch (LogicException $e) {
+            $this->assertFalse(array_key_exists('bar', $twig->getGlobals()));
+        }
+
+        // test adding globals after initRuntime without call to getGlobals
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->initRuntime();
+        try {
+            $twig->addGlobal('bar', 'bar');
+            $this->fail();
+        } catch (LogicException $e) {
+            $this->assertFalse(array_key_exists('bar', $twig->getGlobals()));
+        }
+        */
+    }
+
+    public function testExtensionsAreNotInitializedWhenRenderingACompiledTemplate()
+    {
+        $options = array('cache' => sys_get_temp_dir().'/twig', 'auto_reload' => false, 'debug' => false);
+
+        // force compilation
+        $twig = new Twig_Environment(new Twig_Loader_String(), $options);
+        $cache = $twig->getCacheFilename('{{ foo }}');
+        if (!is_dir(dirname($cache))) {
+            mkdir(dirname($cache), 0777, true);
+        }
+        file_put_contents($cache, $twig->compileSource('{{ foo }}', '{{ foo }}'));
+
+        // check that extensions won't be initialized when rendering a template that is already in the cache
+        $twig = $this
+            ->getMockBuilder('Twig_Environment')
+            ->setConstructorArgs(array(new Twig_Loader_String(), $options))
+            ->setMethods(array('initExtensions'))
+            ->getMock()
+        ;
+
+        $twig->expects($this->never())->method('initExtensions');
+
+        // render template
+        $output = $twig->render('{{ foo }}', array('foo' => 'bar'));
+        $this->assertEquals('bar', $output);
+
+        unlink($cache);
+    }
+
+    public function testAddExtension()
+    {
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addExtension(new Twig_Tests_EnvironmentTest_Extension());
+
+        $this->assertArrayHasKey('test', $twig->getTags());
+        $this->assertArrayHasKey('foo_filter', $twig->getFilters());
+        $this->assertArrayHasKey('foo_function', $twig->getFunctions());
+        $this->assertArrayHasKey('foo_test', $twig->getTests());
+        $this->assertArrayHasKey('foo_unary', $twig->getUnaryOperators());
+        $this->assertArrayHasKey('foo_binary', $twig->getBinaryOperators());
+        $this->assertArrayHasKey('foo_global', $twig->getGlobals());
+        $visitors = $twig->getNodeVisitors();
+        $this->assertEquals('Twig_Tests_EnvironmentTest_NodeVisitor', get_class($visitors[2]));
+    }
+
+    public function testRemoveExtension()
+    {
+        $twig = new Twig_Environment(new Twig_Loader_String());
+        $twig->addExtension(new Twig_Tests_EnvironmentTest_Extension());
+        $twig->removeExtension('environment_test');
+
+        $this->assertFalse(array_key_exists('test', $twig->getTags()));
+        $this->assertFalse(array_key_exists('foo_filter', $twig->getFilters()));
+        $this->assertFalse(array_key_exists('foo_function', $twig->getFunctions()));
+        $this->assertFalse(array_key_exists('foo_test', $twig->getTests()));
+        $this->assertFalse(array_key_exists('foo_unary', $twig->getUnaryOperators()));
+        $this->assertFalse(array_key_exists('foo_binary', $twig->getBinaryOperators()));
+        $this->assertFalse(array_key_exists('foo_global', $twig->getGlobals()));
+        $this->assertCount(2, $twig->getNodeVisitors());
+    }
+}
+
+class Twig_Tests_EnvironmentTest_Extension extends Twig_Extension
+{
+    public function getTokenParsers()
+    {
+        return array(
+            new Twig_Tests_EnvironmentTest_TokenParser(),
+        );
+    }
+
+    public function getNodeVisitors()
+    {
+        return array(
+            new Twig_Tests_EnvironmentTest_NodeVisitor(),
+        );
+    }
+
+    public function getFilters()
+    {
+        return array(
+            'foo_filter' => new Twig_Filter_Function('foo_filter'),
+        );
+    }
+
+    public function getTests()
+    {
+        return array(
+            'foo_test' => new Twig_Test_Function('foo_test'),
+        );
+    }
+
+    public function getFunctions()
+    {
+        return array(
+            'foo_function' => new Twig_Function_Function('foo_function'),
+        );
+    }
+
+    public function getOperators()
+    {
+        return array(
+            array('foo_unary' => array()),
+            array('foo_binary' => array()),
+        );
+    }
+
+    public function getGlobals()
+    {
+        return array(
+            'foo_global' => 'foo_global',
+        );
+    }
+
+    public function getName()
+    {
+        return 'environment_test';
+    }
+}
+
+class Twig_Tests_EnvironmentTest_TokenParser extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+    }
+
+    public function getTag()
+    {
+        return 'test';
+    }
+}
+
+class Twig_Tests_EnvironmentTest_NodeVisitor implements Twig_NodeVisitorInterface
+{
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        return $node;
+    }
+
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        return $node;
+    }
+
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/ErrorTest.php b/vendor/twig/twig/test/Twig/Tests/ErrorTest.php
new file mode 100644
index 00000000..9b286974
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/ErrorTest.php
@@ -0,0 +1,159 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_ErrorTest extends PHPUnit_Framework_TestCase
+{
+    public function testErrorWithObjectFilename()
+    {
+        $error = new Twig_Error('foo');
+        $error->setTemplateFile(new SplFileInfo(__FILE__));
+
+        $this->assertContains('test'.DIRECTORY_SEPARATOR.'Twig'.DIRECTORY_SEPARATOR.'Tests'.DIRECTORY_SEPARATOR.'ErrorTest.php', $error->getMessage());
+    }
+
+    public function testErrorWithArrayFilename()
+    {
+        $error = new Twig_Error('foo');
+        $error->setTemplateFile(array('foo' => 'bar'));
+
+        $this->assertEquals('foo in {"foo":"bar"}', $error->getMessage());
+    }
+
+    public function testTwigExceptionAddsFileAndLineWhenMissing()
+    {
+        $loader = new Twig_Loader_Array(array('index' => "\n\n{{ foo.bar }}\n\n\n{{ 'foo' }}"));
+        $twig = new Twig_Environment($loader, array('strict_variables' => true, 'debug' => true, 'cache' => false));
+
+        $template = $twig->loadTemplate('index');
+
+        try {
+            $template->render(array());
+
+            $this->fail();
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertEquals('Variable "foo" does not exist in "index" at line 3', $e->getMessage());
+            $this->assertEquals(3, $e->getTemplateLine());
+            $this->assertEquals('index', $e->getTemplateFile());
+        }
+    }
+
+    public function testRenderWrapsExceptions()
+    {
+        $loader = new Twig_Loader_Array(array('index' => "\n\n\n{{ foo.bar }}\n\n\n\n{{ 'foo' }}"));
+        $twig = new Twig_Environment($loader, array('strict_variables' => true, 'debug' => true, 'cache' => false));
+
+        $template = $twig->loadTemplate('index');
+
+        try {
+            $template->render(array('foo' => new Twig_Tests_ErrorTest_Foo()));
+
+            $this->fail();
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertEquals('An exception has been thrown during the rendering of a template ("Runtime error...") in "index" at line 4.', $e->getMessage());
+            $this->assertEquals(4, $e->getTemplateLine());
+            $this->assertEquals('index', $e->getTemplateFile());
+        }
+    }
+
+    public function testTwigExceptionAddsFileAndLineWhenMissingWithInheritance()
+    {
+        $loader = new Twig_Loader_Array(array(
+            'index' => "{% extends 'base' %}
+            {% block content %}
+                {{ foo.bar }}
+            {% endblock %}
+            {% block foo %}
+                {{ foo.bar }}
+            {% endblock %}",
+            'base' => '{% block content %}{% endblock %}'
+        ));
+        $twig = new Twig_Environment($loader, array('strict_variables' => true, 'debug' => true, 'cache' => false));
+
+        $template = $twig->loadTemplate('index');
+        try {
+            $template->render(array());
+
+            $this->fail();
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertEquals('Variable "foo" does not exist in "index" at line 3', $e->getMessage());
+            $this->assertEquals(3, $e->getTemplateLine());
+            $this->assertEquals('index', $e->getTemplateFile());
+        }
+
+        try {
+            $template->render(array('foo' => new Twig_Tests_ErrorTest_Foo()));
+
+            $this->fail();
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertEquals('An exception has been thrown during the rendering of a template ("Runtime error...") in "index" at line 3.', $e->getMessage());
+            $this->assertEquals(3, $e->getTemplateLine());
+            $this->assertEquals('index', $e->getTemplateFile());
+        }
+    }
+
+    public function testTwigExceptionAddsFileAndLineWhenMissingWithInheritanceAgain()
+    {
+        $loader = new Twig_Loader_Array(array(
+            'index' => "{% extends 'base' %}
+            {% block content %}
+                {{ parent() }}
+            {% endblock %}",
+            'base' => '{% block content %}{{ foo }}{% endblock %}'
+        ));
+        $twig = new Twig_Environment($loader, array('strict_variables' => true, 'debug' => true, 'cache' => false));
+
+        $template = $twig->loadTemplate('index');
+        try {
+            $template->render(array());
+
+            $this->fail();
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertEquals('Variable "foo" does not exist in "base" at line 1', $e->getMessage());
+            $this->assertEquals(1, $e->getTemplateLine());
+            $this->assertEquals('base', $e->getTemplateFile());
+        }
+    }
+
+    public function testTwigExceptionAddsFileAndLineWhenMissingWithInheritanceOnDisk()
+    {
+        $loader = new Twig_Loader_Filesystem(dirname(__FILE__).'/Fixtures/errors');
+        $twig = new Twig_Environment($loader, array('strict_variables' => true, 'debug' => true, 'cache' => false));
+
+        $template = $twig->loadTemplate('index.html');
+        try {
+            $template->render(array());
+
+            $this->fail();
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertEquals('Variable "foo" does not exist in "index.html" at line 3', $e->getMessage());
+            $this->assertEquals(3, $e->getTemplateLine());
+            $this->assertEquals('index.html', $e->getTemplateFile());
+        }
+
+        try {
+            $template->render(array('foo' => new Twig_Tests_ErrorTest_Foo()));
+
+            $this->fail();
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertEquals('An exception has been thrown during the rendering of a template ("Runtime error...") in "index.html" at line 3.', $e->getMessage());
+            $this->assertEquals(3, $e->getTemplateLine());
+            $this->assertEquals('index.html', $e->getTemplateFile());
+        }
+    }
+}
+
+class Twig_Tests_ErrorTest_Foo
+{
+    public function bar()
+    {
+        throw new Exception('Runtime error...');
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/ExpressionParserTest.php b/vendor/twig/twig/test/Twig/Tests/ExpressionParserTest.php
new file mode 100644
index 00000000..8ec6537a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/ExpressionParserTest.php
@@ -0,0 +1,332 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_ExpressionParserTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @dataProvider getFailingTestsForAssignment
+     */
+    public function testCanOnlyAssignToNames($template)
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize($template, 'index'));
+    }
+
+    public function getFailingTestsForAssignment()
+    {
+        return array(
+            array('{% set false = "foo" %}'),
+            array('{% set true = "foo" %}'),
+            array('{% set none = "foo" %}'),
+            array('{% set 3 = "foo" %}'),
+            array('{% set 1 + 2 = "foo" %}'),
+            array('{% set "bar" = "foo" %}'),
+            array('{% set %}{% endset %}')
+        );
+    }
+
+    /**
+     * @dataProvider getTestsForArray
+     */
+    public function testArrayExpression($template, $expected)
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $stream = $env->tokenize($template, 'index');
+        $parser = new Twig_Parser($env);
+
+        $this->assertEquals($expected, $parser->parse($stream)->getNode('body')->getNode(0)->getNode('expr'));
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @dataProvider getFailingTestsForArray
+     */
+    public function testArraySyntaxError($template)
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize($template, 'index'));
+    }
+
+    public function getFailingTestsForArray()
+    {
+        return array(
+            array('{{ [1, "a": "b"] }}'),
+            array('{{ {"a": "b", 2} }}'),
+        );
+    }
+
+    public function getTestsForArray()
+    {
+        return array(
+            // simple array
+            array('{{ [1, 2] }}', new Twig_Node_Expression_Array(array(
+                  new Twig_Node_Expression_Constant(0, 1),
+                  new Twig_Node_Expression_Constant(1, 1),
+
+                  new Twig_Node_Expression_Constant(1, 1),
+                  new Twig_Node_Expression_Constant(2, 1),
+                ), 1),
+            ),
+
+            // array with trailing ,
+            array('{{ [1, 2, ] }}', new Twig_Node_Expression_Array(array(
+                  new Twig_Node_Expression_Constant(0, 1),
+                  new Twig_Node_Expression_Constant(1, 1),
+
+                  new Twig_Node_Expression_Constant(1, 1),
+                  new Twig_Node_Expression_Constant(2, 1),
+                ), 1),
+            ),
+
+            // simple hash
+            array('{{ {"a": "b", "b": "c"} }}', new Twig_Node_Expression_Array(array(
+                  new Twig_Node_Expression_Constant('a', 1),
+                  new Twig_Node_Expression_Constant('b', 1),
+
+                  new Twig_Node_Expression_Constant('b', 1),
+                  new Twig_Node_Expression_Constant('c', 1),
+                ), 1),
+            ),
+
+            // hash with trailing ,
+            array('{{ {"a": "b", "b": "c", } }}', new Twig_Node_Expression_Array(array(
+                  new Twig_Node_Expression_Constant('a', 1),
+                  new Twig_Node_Expression_Constant('b', 1),
+
+                  new Twig_Node_Expression_Constant('b', 1),
+                  new Twig_Node_Expression_Constant('c', 1),
+                ), 1),
+            ),
+
+            // hash in an array
+            array('{{ [1, {"a": "b", "b": "c"}] }}', new Twig_Node_Expression_Array(array(
+                  new Twig_Node_Expression_Constant(0, 1),
+                  new Twig_Node_Expression_Constant(1, 1),
+
+                  new Twig_Node_Expression_Constant(1, 1),
+                  new Twig_Node_Expression_Array(array(
+                        new Twig_Node_Expression_Constant('a', 1),
+                        new Twig_Node_Expression_Constant('b', 1),
+
+                        new Twig_Node_Expression_Constant('b', 1),
+                        new Twig_Node_Expression_Constant('c', 1),
+                      ), 1),
+                ), 1),
+            ),
+
+            // array in a hash
+            array('{{ {"a": [1, 2], "b": "c"} }}', new Twig_Node_Expression_Array(array(
+                  new Twig_Node_Expression_Constant('a', 1),
+                  new Twig_Node_Expression_Array(array(
+                        new Twig_Node_Expression_Constant(0, 1),
+                        new Twig_Node_Expression_Constant(1, 1),
+
+                        new Twig_Node_Expression_Constant(1, 1),
+                        new Twig_Node_Expression_Constant(2, 1),
+                      ), 1),
+                  new Twig_Node_Expression_Constant('b', 1),
+                  new Twig_Node_Expression_Constant('c', 1),
+                ), 1),
+            ),
+        );
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     */
+    public function testStringExpressionDoesNotConcatenateTwoConsecutiveStrings()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false, 'optimizations' => 0));
+        $stream = $env->tokenize('{{ "a" "b" }}', 'index');
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($stream);
+    }
+
+    /**
+     * @dataProvider getTestsForString
+     */
+    public function testStringExpression($template, $expected)
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false, 'optimizations' => 0));
+        $stream = $env->tokenize($template, 'index');
+        $parser = new Twig_Parser($env);
+
+        $this->assertEquals($expected, $parser->parse($stream)->getNode('body')->getNode(0)->getNode('expr'));
+    }
+
+    public function getTestsForString()
+    {
+        return array(
+            array(
+                '{{ "foo" }}', new Twig_Node_Expression_Constant('foo', 1),
+            ),
+            array(
+                '{{ "foo #{bar}" }}', new Twig_Node_Expression_Binary_Concat(
+                    new Twig_Node_Expression_Constant('foo ', 1),
+                    new Twig_Node_Expression_Name('bar', 1),
+                    1
+                ),
+            ),
+            array(
+                '{{ "foo #{bar} baz" }}', new Twig_Node_Expression_Binary_Concat(
+                    new Twig_Node_Expression_Binary_Concat(
+                        new Twig_Node_Expression_Constant('foo ', 1),
+                        new Twig_Node_Expression_Name('bar', 1),
+                        1
+                    ),
+                    new Twig_Node_Expression_Constant(' baz', 1),
+                    1
+                )
+            ),
+
+            array(
+                '{{ "foo #{"foo #{bar} baz"} baz" }}', new Twig_Node_Expression_Binary_Concat(
+                    new Twig_Node_Expression_Binary_Concat(
+                        new Twig_Node_Expression_Constant('foo ', 1),
+                        new Twig_Node_Expression_Binary_Concat(
+                            new Twig_Node_Expression_Binary_Concat(
+                                new Twig_Node_Expression_Constant('foo ', 1),
+                                new Twig_Node_Expression_Name('bar', 1),
+                                1
+                            ),
+                            new Twig_Node_Expression_Constant(' baz', 1),
+                            1
+                        ),
+                        1
+                    ),
+                    new Twig_Node_Expression_Constant(' baz', 1),
+                    1
+                ),
+            ),
+        );
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     */
+    public function testAttributeCallDoesNotSupportNamedArguments()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize('{{ foo.bar(name="Foo") }}', 'index'));
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     */
+    public function testMacroCallDoesNotSupportNamedArguments()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize('{% from _self import foo %}{% macro foo() %}{% endmacro %}{{ foo(name="Foo") }}', 'index'));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage An argument must be a name. Unexpected token "string" of value "a" ("name" expected) in "index" at line 1
+     */
+    public function testMacroDefinitionDoesNotSupportNonNameVariableName()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize('{% macro foo("a") %}{% endmacro %}', 'index'));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage A default value for an argument must be a constant (a boolean, a string, a number, or an array) in "index" at line 1
+     * @dataProvider             getMacroDefinitionDoesNotSupportNonConstantDefaultValues
+     */
+    public function testMacroDefinitionDoesNotSupportNonConstantDefaultValues($template)
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize($template, 'index'));
+    }
+
+    public function getMacroDefinitionDoesNotSupportNonConstantDefaultValues()
+    {
+        return array(
+            array('{% macro foo(name = "a #{foo} a") %}{% endmacro %}'),
+            array('{% macro foo(name = [["b", "a #{foo} a"]]) %}{% endmacro %}'),
+        );
+    }
+
+    /**
+     * @dataProvider getMacroDefinitionSupportsConstantDefaultValues
+     */
+    public function testMacroDefinitionSupportsConstantDefaultValues($template)
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize($template, 'index'));
+    }
+
+    public function getMacroDefinitionSupportsConstantDefaultValues()
+    {
+        return array(
+            array('{% macro foo(name = "aa") %}{% endmacro %}'),
+            array('{% macro foo(name = 12) %}{% endmacro %}'),
+            array('{% macro foo(name = true) %}{% endmacro %}'),
+            array('{% macro foo(name = ["a"]) %}{% endmacro %}'),
+            array('{% macro foo(name = [["a"]]) %}{% endmacro %}'),
+            array('{% macro foo(name = {a: "a"}) %}{% endmacro %}'),
+            array('{% macro foo(name = {a: {b: "a"}}) %}{% endmacro %}'),
+        );
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage The function "cycl" does not exist. Did you mean "cycle" in "index" at line 1
+     */
+    public function testUnknownFunction()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize('{{ cycl() }}', 'index'));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage The filter "lowe" does not exist. Did you mean "lower" in "index" at line 1
+     */
+    public function testUnknownFilter()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize('{{ 1|lowe }}', 'index'));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage The test "nul" does not exist. Did you mean "null" in "index" at line 1
+     */
+    public function testUnknownTest()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $parser = new Twig_Parser($env);
+
+        $parser->parse($env->tokenize('{{ 1 is nul }}', 'index'));
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Extension/CoreTest.php b/vendor/twig/twig/test/Twig/Tests/Extension/CoreTest.php
new file mode 100644
index 00000000..5743e343
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Extension/CoreTest.php
@@ -0,0 +1,117 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Extension_CoreTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider getRandomFunctionTestData
+     */
+    public function testRandomFunction($value, $expectedInArray)
+    {
+        $env = new Twig_Environment();
+
+        for ($i = 0; $i < 100; $i++) {
+            $this->assertTrue(in_array(twig_random($env, $value), $expectedInArray, true)); // assertContains() would not consider the type
+        }
+    }
+
+    public function getRandomFunctionTestData()
+    {
+        return array(
+            array( // array
+                array('apple', 'orange', 'citrus'),
+                array('apple', 'orange', 'citrus'),
+            ),
+            array( // Traversable
+                new ArrayObject(array('apple', 'orange', 'citrus')),
+                array('apple', 'orange', 'citrus'),
+            ),
+            array( // unicode string
+                'Ä€é',
+                array('Ä', '€', 'é'),
+            ),
+            array( // numeric but string
+                '123',
+                array('1', '2', '3'),
+            ),
+            array( // integer
+                5,
+                range(0, 5, 1),
+            ),
+            array( // float
+                5.9,
+                range(0, 5, 1),
+            ),
+            array( // negative
+                -2,
+                array(0, -1, -2),
+            ),
+        );
+    }
+
+    public function testRandomFunctionWithoutParameter()
+    {
+        $max = mt_getrandmax();
+
+        for ($i = 0; $i < 100; $i++) {
+            $val = twig_random(new Twig_Environment());
+            $this->assertTrue(is_int($val) && $val >= 0 && $val <= $max);
+        }
+    }
+
+    public function testRandomFunctionReturnsAsIs()
+    {
+        $this->assertSame('', twig_random(new Twig_Environment(), ''));
+        $this->assertSame('', twig_random(new Twig_Environment(null, array('charset' => null)), ''));
+
+        $instance = new stdClass();
+        $this->assertSame($instance, twig_random(new Twig_Environment(), $instance));
+    }
+
+    /**
+     * @expectedException Twig_Error_Runtime
+     */
+    public function testRandomFunctionOfEmptyArrayThrowsException()
+    {
+        twig_random(new Twig_Environment(), array());
+    }
+
+    public function testRandomFunctionOnNonUTF8String()
+    {
+        if (!function_exists('iconv') && !function_exists('mb_convert_encoding')) {
+            $this->markTestSkipped('needs iconv or mbstring');
+        }
+
+        $twig = new Twig_Environment();
+        $twig->setCharset('ISO-8859-1');
+
+        $text = twig_convert_encoding('Äé', 'ISO-8859-1', 'UTF-8');
+        for ($i = 0; $i < 30; $i++) {
+            $rand = twig_random($twig, $text);
+            $this->assertTrue(in_array(twig_convert_encoding($rand, 'UTF-8', 'ISO-8859-1'), array('Ä', 'é'), true));
+        }
+    }
+
+    public function testReverseFilterOnNonUTF8String()
+    {
+        if (!function_exists('iconv') && !function_exists('mb_convert_encoding')) {
+            $this->markTestSkipped('needs iconv or mbstring');
+        }
+
+        $twig = new Twig_Environment();
+        $twig->setCharset('ISO-8859-1');
+
+        $input = twig_convert_encoding('Äé', 'ISO-8859-1', 'UTF-8');
+        $output = twig_convert_encoding(twig_reverse_filter($twig, $input), 'UTF-8', 'ISO-8859-1');
+
+        $this->assertEquals($output, 'éÄ');
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Extension/SandboxTest.php b/vendor/twig/twig/test/Twig/Tests/Extension/SandboxTest.php
new file mode 100644
index 00000000..72253c88
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Extension/SandboxTest.php
@@ -0,0 +1,212 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Extension_SandboxTest extends PHPUnit_Framework_TestCase
+{
+    protected static $params, $templates;
+
+    public function setUp()
+    {
+        self::$params = array(
+            'name' => 'Fabien',
+            'obj'  => new FooObject(),
+            'arr'  => array('obj' => new FooObject()),
+        );
+
+        self::$templates = array(
+            '1_basic1' => '{{ obj.foo }}',
+            '1_basic2' => '{{ name|upper }}',
+            '1_basic3' => '{% if name %}foo{% endif %}',
+            '1_basic4' => '{{ obj.bar }}',
+            '1_basic5' => '{{ obj }}',
+            '1_basic6' => '{{ arr.obj }}',
+            '1_basic7' => '{{ cycle(["foo","bar"], 1) }}',
+            '1_basic8' => '{{ obj.getfoobar }}{{ obj.getFooBar }}',
+            '1_basic'  => '{% if obj.foo %}{{ obj.foo|upper }}{% endif %}',
+            '1_layout' => '{% block content %}{% endblock %}',
+            '1_child'  => '{% extends "1_layout" %}{% block content %}{{ "a"|json_encode }}{% endblock %}',
+        );
+    }
+
+    /**
+     * @expectedException        Twig_Sandbox_SecurityError
+     * @expectedExceptionMessage Filter "json_encode" is not allowed in "1_child".
+     */
+    public function testSandboxWithInheritance()
+    {
+        $twig = $this->getEnvironment(true, array(), self::$templates, array('block'));
+        $twig->loadTemplate('1_child')->render(array());
+    }
+
+    public function testSandboxGloballySet()
+    {
+        $twig = $this->getEnvironment(false, array(), self::$templates);
+        $this->assertEquals('FOO', $twig->loadTemplate('1_basic')->render(self::$params), 'Sandbox does nothing if it is disabled globally');
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('1_basic1')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception if an unallowed method is called');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('1_basic2')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception if an unallowed filter is called');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('1_basic3')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception if an unallowed tag is used in the template');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('1_basic4')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception if an unallowed property is called in the template');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('1_basic5')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception if an unallowed method (__toString()) is called in the template');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('1_basic6')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception if an unallowed method (__toString()) is called in the template');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('1_basic7')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception if an unallowed function is called in the template');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+
+        $twig = $this->getEnvironment(true, array(), self::$templates, array(), array(), array('FooObject' => 'foo'));
+        FooObject::reset();
+        $this->assertEquals('foo', $twig->loadTemplate('1_basic1')->render(self::$params), 'Sandbox allow some methods');
+        $this->assertEquals(1, FooObject::$called['foo'], 'Sandbox only calls method once');
+
+        $twig = $this->getEnvironment(true, array(), self::$templates, array(), array(), array('FooObject' => '__toString'));
+        FooObject::reset();
+        $this->assertEquals('foo', $twig->loadTemplate('1_basic5')->render(self::$params), 'Sandbox allow some methods');
+        $this->assertEquals(1, FooObject::$called['__toString'], 'Sandbox only calls method once');
+
+        $twig = $this->getEnvironment(true, array(), self::$templates, array(), array('upper'));
+        $this->assertEquals('FABIEN', $twig->loadTemplate('1_basic2')->render(self::$params), 'Sandbox allow some filters');
+
+        $twig = $this->getEnvironment(true, array(), self::$templates, array('if'));
+        $this->assertEquals('foo', $twig->loadTemplate('1_basic3')->render(self::$params), 'Sandbox allow some tags');
+
+        $twig = $this->getEnvironment(true, array(), self::$templates, array(), array(), array(), array('FooObject' => 'bar'));
+        $this->assertEquals('bar', $twig->loadTemplate('1_basic4')->render(self::$params), 'Sandbox allow some properties');
+
+        $twig = $this->getEnvironment(true, array(), self::$templates, array(), array(), array(), array(), array('cycle'));
+        $this->assertEquals('bar', $twig->loadTemplate('1_basic7')->render(self::$params), 'Sandbox allow some functions');
+
+        foreach (array('getfoobar', 'getFoobar', 'getFooBar') as $name) {
+            $twig = $this->getEnvironment(true, array(), self::$templates, array(), array(), array('FooObject' => $name));
+            FooObject::reset();
+            $this->assertEquals('foobarfoobar', $twig->loadTemplate('1_basic8')->render(self::$params), 'Sandbox allow methods in a case-insensitive way');
+            $this->assertEquals(2, FooObject::$called['getFooBar'], 'Sandbox only calls method once');
+        }
+    }
+
+    public function testSandboxLocallySetForAnInclude()
+    {
+        self::$templates = array(
+            '2_basic'    => '{{ obj.foo }}{% include "2_included" %}{{ obj.foo }}',
+            '2_included' => '{% if obj.foo %}{{ obj.foo|upper }}{% endif %}',
+        );
+
+        $twig = $this->getEnvironment(false, array(), self::$templates);
+        $this->assertEquals('fooFOOfoo', $twig->loadTemplate('2_basic')->render(self::$params), 'Sandbox does nothing if disabled globally and sandboxed not used for the include');
+
+        self::$templates = array(
+            '3_basic'    => '{{ obj.foo }}{% sandbox %}{% include "3_included" %}{% endsandbox %}{{ obj.foo }}',
+            '3_included' => '{% if obj.foo %}{{ obj.foo|upper }}{% endif %}',
+        );
+
+        $twig = $this->getEnvironment(true, array(), self::$templates);
+        try {
+            $twig->loadTemplate('3_basic')->render(self::$params);
+            $this->fail('Sandbox throws a SecurityError exception when the included file is sandboxed');
+        } catch (Twig_Sandbox_SecurityError $e) {
+        }
+    }
+
+    public function testMacrosInASandbox()
+    {
+        $twig = $this->getEnvironment(true, array('autoescape' => true), array('index' => <<<EOF
+{%- import _self as macros %}
+
+{%- macro test(text) %}<p>{{ text }}</p>{% endmacro %}
+
+{{- macros.test('username') }}
+EOF
+        ), array('macro', 'import'), array('escape'));
+
+        $this->assertEquals('<p>username</p>', $twig->loadTemplate('index')->render(array()));
+    }
+
+    protected function getEnvironment($sandboxed, $options, $templates, $tags = array(), $filters = array(), $methods = array(), $properties = array(), $functions = array())
+    {
+        $loader = new Twig_Loader_Array($templates);
+        $twig = new Twig_Environment($loader, array_merge(array('debug' => true, 'cache' => false, 'autoescape' => false), $options));
+        $policy = new Twig_Sandbox_SecurityPolicy($tags, $filters, $methods, $properties, $functions);
+        $twig->addExtension(new Twig_Extension_Sandbox($policy, $sandboxed));
+
+        return $twig;
+    }
+}
+
+class FooObject
+{
+    public static $called = array('__toString' => 0, 'foo' => 0, 'getFooBar' => 0);
+
+    public $bar = 'bar';
+
+    public static function reset()
+    {
+        self::$called = array('__toString' => 0, 'foo' => 0, 'getFooBar' => 0);
+    }
+
+    public function __toString()
+    {
+        ++self::$called['__toString'];
+
+        return 'foo';
+    }
+
+    public function foo()
+    {
+        ++self::$called['foo'];
+
+        return 'foo';
+    }
+
+    public function getFooBar()
+    {
+        ++self::$called['getFooBar'];
+
+        return 'foobar';
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/FileCachingTest.php b/vendor/twig/twig/test/Twig/Tests/FileCachingTest.php
new file mode 100644
index 00000000..8efc948f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/FileCachingTest.php
@@ -0,0 +1,70 @@
+<?php
+
+class Twig_Tests_FileCachingTest extends PHPUnit_Framework_TestCase
+{
+    protected $fileName;
+    protected $env;
+    protected $tmpDir;
+
+    public function setUp()
+    {
+        $this->tmpDir = sys_get_temp_dir().'/TwigTests';
+        if (!file_exists($this->tmpDir)) {
+            @mkdir($this->tmpDir, 0777, true);
+        }
+
+        if (!is_writable($this->tmpDir)) {
+            $this->markTestSkipped(sprintf('Unable to run the tests as "%s" is not writable.', $this->tmpDir));
+        }
+
+        $this->env = new Twig_Environment(new Twig_Loader_String(), array('cache' => $this->tmpDir));
+    }
+
+    public function tearDown()
+    {
+        if ($this->fileName) {
+            unlink($this->fileName);
+        }
+
+        $this->removeDir($this->tmpDir);
+    }
+
+    public function testWritingCacheFiles()
+    {
+        $name = 'This is just text.';
+        $template = $this->env->loadTemplate($name);
+        $cacheFileName = $this->env->getCacheFilename($name);
+
+        $this->assertTrue(file_exists($cacheFileName), 'Cache file does not exist.');
+        $this->fileName = $cacheFileName;
+    }
+
+    public function testClearingCacheFiles()
+    {
+        $name = 'I will be deleted.';
+        $template = $this->env->loadTemplate($name);
+        $cacheFileName = $this->env->getCacheFilename($name);
+
+        $this->assertTrue(file_exists($cacheFileName), 'Cache file does not exist.');
+        $this->env->clearCacheFiles();
+        $this->assertFalse(file_exists($cacheFileName), 'Cache file was not cleared.');
+    }
+
+    private function removeDir($target)
+    {
+        $fp = opendir($target);
+        while (false !== $file = readdir($fp)) {
+            if (in_array($file, array('.', '..'))) {
+                continue;
+            }
+
+            if (is_dir($target.'/'.$file)) {
+                self::removeDir($target.'/'.$file);
+            } else {
+                unlink($target.'/'.$file);
+            }
+        }
+        closedir($fp);
+        rmdir($target);
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/errors/base.html b/vendor/twig/twig/test/Twig/Tests/Fixtures/errors/base.html
new file mode 100644
index 00000000..cb0dbe44
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/errors/base.html
@@ -0,0 +1 @@
+{% block content %}{% endblock %}
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/errors/index.html b/vendor/twig/twig/test/Twig/Tests/Fixtures/errors/index.html
new file mode 100644
index 00000000..df57c822
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/errors/index.html
@@ -0,0 +1,7 @@
+{% extends 'base.html' %}
+{% block content %}
+    {{ foo.bar }}
+{% endblock %}
+{% block foo %}
+    {{ foo.bar }}
+{% endblock %}
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/exceptions/unclosed_tag.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/exceptions/unclosed_tag.test
new file mode 100644
index 00000000..02245e93
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/exceptions/unclosed_tag.test
@@ -0,0 +1,20 @@
+--TEST--
+Exception for an unclosed tag
+--TEMPLATE--
+{% block foo %}
+     {% if foo %}
+
+
+
+
+         {% for i in fo %}
+
+
+
+         {% endfor %}
+
+
+
+{% endblock %}
+--EXCEPTION--
+Twig_Error_Syntax: Unexpected tag name "endblock" (expecting closing tag for the "if" tag defined near line 4) in "index.twig" at line 16
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/array.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/array.test
new file mode 100644
index 00000000..c69b1192
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/array.test
@@ -0,0 +1,61 @@
+--TEST--
+Twig supports array notation
+--TEMPLATE--
+{# empty array #}
+{{ []|join(',') }}
+
+{{ [1, 2]|join(',') }}
+{{ ['foo', "bar"]|join(',') }}
+{{ {0: 1, 'foo': 'bar'}|join(',') }}
+{{ {0: 1, 'foo': 'bar'}|keys|join(',') }}
+
+{{ {0: 1, foo: 'bar'}|join(',') }}
+{{ {0: 1, foo: 'bar'}|keys|join(',') }}
+
+{# nested arrays #}
+{% set a = [1, 2, [1, 2], {'foo': {'foo': 'bar'}}] %}
+{{ a[2]|join(',') }}
+{{ a[3]["foo"]|join(',') }}
+
+{# works even if [] is used inside the array #}
+{{ [foo[bar]]|join(',') }}
+
+{# elements can be any expression #}
+{{ ['foo'|upper, bar|upper, bar == foo]|join(',') }}
+
+{# arrays can have a trailing , like in PHP #}
+{{
+  [
+    1,
+    2,
+  ]|join(',')
+}}
+
+{# keys can be any expression #}
+{% set a = 1 %}
+{% set b = "foo" %}
+{% set ary = { (a): 'a', (b): 'b', 'c': 'c', (a ~ b): 'd' } %}
+{{ ary|keys|join(',') }}
+{{ ary|join(',') }}
+--DATA--
+return array('bar' => 'bar', 'foo' => array('bar' => 'bar'))
+--EXPECT--
+1,2
+foo,bar
+1,bar
+0,foo
+
+1,bar
+0,foo
+
+1,2
+bar
+
+bar
+
+FOO,BAR,
+
+1,2
+
+1,foo,c,1foo
+a,b,c,d
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/array_call.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/array_call.test
new file mode 100644
index 00000000..f3df328f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/array_call.test
@@ -0,0 +1,14 @@
+--TEST--
+Twig supports method calls
+--TEMPLATE--
+{{ items.foo }}
+{{ items['foo'] }}
+{{ items[foo] }}
+{{ items[items[foo]] }}
+--DATA--
+return array('foo' => 'bar', 'items' => array('foo' => 'bar', 'bar' => 'foo'))
+--EXPECT--
+bar
+bar
+foo
+bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/binary.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/binary.test
new file mode 100644
index 00000000..f5e68456
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/binary.test
@@ -0,0 +1,46 @@
+--TEST--
+Twig supports binary operations (+, -, *, /, ~, %, and, or)
+--TEMPLATE--
+{{ 1 + 1 }}
+{{ 2 - 1 }}
+{{ 2 * 2 }}
+{{ 2 / 2 }}
+{{ 3 % 2 }}
+{{ 1 and 1 }}
+{{ 1 and 0 }}
+{{ 0 and 1 }}
+{{ 0 and 0 }}
+{{ 1 or 1 }}
+{{ 1 or 0 }}
+{{ 0 or 1 }}
+{{ 0 or 0 }}
+{{ 0 or 1 and 0 }}
+{{ 1 or 0 and 1 }}
+{{ "foo" ~ "bar" }}
+{{ foo ~ "bar" }}
+{{ "foo" ~ bar }}
+{{ foo ~ bar }}
+{{ 20 // 7 }}
+--DATA--
+return array('foo' => 'bar', 'bar' => 'foo')
+--EXPECT--
+2
+1
+4
+1
+1
+1
+
+
+
+1
+1
+1
+
+
+1
+foobar
+barbar
+foofoo
+barfoo
+2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/bitwise.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/bitwise.test
new file mode 100644
index 00000000..7b56b761
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/bitwise.test
@@ -0,0 +1,14 @@
+--TEST--
+Twig supports bitwise operations
+--TEMPLATE--
+{{ 1 b-and 5 }}
+{{ 1 b-or 5 }}
+{{ 1 b-xor 5 }}
+{{ (1 and 0 b-or 0) is sameas(1 and (0 b-or 0)) ? 'ok' : 'ko' }}
+--DATA--
+return array()
+--EXPECT--
+1
+5
+4
+ok
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/comparison.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/comparison.test
new file mode 100644
index 00000000..726b8507
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/comparison.test
@@ -0,0 +1,14 @@
+--TEST--
+Twig supports comparison operators (==, !=, <, >, >=, <=)
+--TEMPLATE--
+{{ 1 > 2 }}/{{ 1 > 1 }}/{{ 1 >= 2 }}/{{ 1 >= 1 }}
+{{ 1 < 2 }}/{{ 1 < 1 }}/{{ 1 <= 2 }}/{{ 1 <= 1 }}
+{{ 1 == 1 }}/{{ 1 == 2 }}
+{{ 1 != 1 }}/{{ 1 != 2 }}
+--DATA--
+return array()
+--EXPECT--
+///1
+1//1/1
+1/
+/1
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/dotdot.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/dotdot.test
new file mode 100644
index 00000000..9cd0676c
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/dotdot.test
@@ -0,0 +1,20 @@
+--TEST--
+Twig supports the .. operator
+--TEMPLATE--
+{% for i in 0..10 %}{{ i }} {% endfor %}
+
+{% for letter in 'a'..'z' %}{{ letter }} {% endfor %}
+
+{% for letter in 'a'|upper..'z'|upper %}{{ letter }} {% endfor %}
+
+{% for i in foo[0]..foo[1] %}{{ i }} {% endfor %}
+
+{% for i in 0 + 1 .. 10 - 1 %}{{ i }} {% endfor %}
+--DATA--
+return array('foo' => array(1, 10))
+--EXPECT--
+0 1 2 3 4 5 6 7 8 9 10 
+a b c d e f g h i j k l m n o p q r s t u v w x y z 
+A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 
+1 2 3 4 5 6 7 8 9 10 
+1 2 3 4 5 6 7 8 9
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/grouping.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/grouping.test
new file mode 100644
index 00000000..79f8e0b0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/grouping.test
@@ -0,0 +1,8 @@
+--TEST--
+Twig supports grouping of expressions
+--TEMPLATE--
+{{ (2 + 2) / 2 }}
+--DATA--
+return array()
+--EXPECT--
+2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/literals.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/literals.test
new file mode 100644
index 00000000..7ae3bae9
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/literals.test
@@ -0,0 +1,22 @@
+--TEST--
+Twig supports literals
+--TEMPLATE--
+1 {{ true }}
+2 {{ TRUE }}
+3 {{ false }}
+4 {{ FALSE }}
+5 {{ none }}
+6 {{ NONE }}
+7 {{ null }}
+8 {{ NULL }}
+--DATA--
+return array()
+--EXPECT--
+1 1
+2 1
+3 
+4 
+5 
+6 
+7 
+8 
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/magic_call.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/magic_call.test
new file mode 100644
index 00000000..159db96f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/magic_call.test
@@ -0,0 +1,27 @@
+--TEST--
+Twig supports __call() for attributes
+--TEMPLATE--
+{{ foo.foo }}
+{{ foo.bar }}
+--DATA--
+class TestClassForMagicCallAttributes
+{
+  public function getBar()
+  {
+    return 'bar_from_getbar';
+  }
+
+  public function __call($method, $arguments)
+  {
+    if ('foo' === $method)
+    {
+      return 'foo_from_call';
+    }
+
+    return false;
+  }
+}
+return array('foo' => new TestClassForMagicCallAttributes())
+--EXPECT--
+foo_from_call
+bar_from_getbar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/method_call.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/method_call.test
new file mode 100644
index 00000000..5f801e63
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/method_call.test
@@ -0,0 +1,28 @@
+--TEST--
+Twig supports method calls
+--TEMPLATE--
+{{ items.foo.foo }}
+{{ items.foo.getFoo() }}
+{{ items.foo.bar }}
+{{ items.foo['bar'] }}
+{{ items.foo.bar('a', 43) }}
+{{ items.foo.bar(foo) }}
+{{ items.foo.self.foo() }}
+{{ items.foo.is }}
+{{ items.foo.in }}
+{{ items.foo.not }}
+--DATA--
+return array('foo' => 'bar', 'items' => array('foo' => new TwigTestFoo(), 'bar' => 'foo'))
+--CONFIG--
+return array('strict_variables' => false)
+--EXPECT--
+foo
+foo
+bar
+
+bar_a-43
+bar_bar
+foo
+is
+in
+not
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/postfix.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/postfix.test
new file mode 100644
index 00000000..542c3504
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/postfix.test
@@ -0,0 +1,22 @@
+--TEST--
+Twig parses postfix expressions
+--TEMPLATE--
+{% import _self as macros %}
+
+{% macro foo() %}foo{% endmacro %}
+
+{{ 'a' }}
+{{ 'a'|upper }}
+{{ ('a')|upper }}
+{{ -1|upper }}
+{{ macros.foo() }}
+{{ (macros).foo() }}
+--DATA--
+return array();
+--EXPECT--
+a
+A
+A
+-1
+foo
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/strings.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/strings.test
new file mode 100644
index 00000000..a9116613
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/strings.test
@@ -0,0 +1,10 @@
+--TEST--
+Twig supports string interpolation
+--TEMPLATE--
+{{ "foo #{"foo #{bar} baz"} baz" }}
+{{ "foo #{bar}#{bar} baz" }}
+--DATA--
+return array('bar' => 'BAR');
+--EXPECT--
+foo foo BAR baz baz
+foo BARBAR baz
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator.test
new file mode 100644
index 00000000..0e6fa96e
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator.test
@@ -0,0 +1,18 @@
+--TEST--
+Twig supports the ternary operator
+--TEMPLATE--
+{{ 1 ? 'YES' : 'NO' }}
+{{ 0 ? 'YES' : 'NO' }}
+{{ 0 ? 'YES' : (1 ? 'YES1' : 'NO1') }}
+{{ 0 ? 'YES' : (0 ? 'YES1' : 'NO1') }}
+{{ 1 == 1 ? 'foo<br />':'' }}
+{{ foo ~ (bar ? ('-' ~ bar) : '') }}
+--DATA--
+return array('foo' => 'foo', 'bar' => 'bar')
+--EXPECT--
+YES
+NO
+YES1
+NO1
+foo<br />
+foo-bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator_noelse.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator_noelse.test
new file mode 100644
index 00000000..fdc660fc
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator_noelse.test
@@ -0,0 +1,10 @@
+--TEST--
+Twig supports the ternary operator
+--TEMPLATE--
+{{ 1 ? 'YES' }}
+{{ 0 ? 'YES' }}
+--DATA--
+return array()
+--EXPECT--
+YES
+
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator_nothen.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator_nothen.test
new file mode 100644
index 00000000..9057e837
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/ternary_operator_nothen.test
@@ -0,0 +1,10 @@
+--TEST--
+Twig supports the ternary operator
+--TEMPLATE--
+{{ 'YES' ?: 'NO' }}
+{{ 0 ?: 'NO' }}
+--DATA--
+return array()
+--EXPECT--
+YES
+NO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/unary.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/unary.test
new file mode 100644
index 00000000..b79219a2
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/unary.test
@@ -0,0 +1,12 @@
+--TEST--
+Twig supports unary operators (not, -, +)
+--TEMPLATE--
+{{ not 1 }}/{{ not 0 }}
+{{ +1 + 1 }}/{{ -1 - 1 }}
+{{ not (false or true) }}
+--DATA--
+return array()
+--EXPECT--
+/1
+2/-2
+
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/unary_precedence.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/unary_precedence.test
new file mode 100644
index 00000000..cc6eef8d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/expressions/unary_precedence.test
@@ -0,0 +1,14 @@
+--TEST--
+Twig unary operators precedence
+--TEMPLATE--
+{{ -1 - 1 }}
+{{ -1 - -1 }}
+{{ -1 * -1 }}
+{{ 4 / -1 * 5 }}
+--DATA--
+return array()
+--EXPECT--
+-2
+0
+1
+-20
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/abs.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/abs.test
new file mode 100644
index 00000000..27e93fd6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/abs.test
@@ -0,0 +1,30 @@
+--TEST--
+"abs" filter
+--TEMPLATE--
+{{ (-5.5)|abs }}
+{{ (-5)|abs }}
+{{ (-0)|abs }}
+{{ 0|abs }}
+{{ 5|abs }}
+{{ 5.5|abs }}
+{{ number1|abs }}
+{{ number2|abs }}
+{{ number3|abs }}
+{{ number4|abs }}
+{{ number5|abs }}
+{{ number6|abs }}
+--DATA--
+return array('number1' => -5.5, 'number2' => -5, 'number3' => -0, 'number4' => 0, 'number5' => 5, 'number6' => 5.5)
+--EXPECT--
+5.5
+5
+0
+0
+5
+5.5
+5.5
+5
+0
+0
+5
+5.5
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch.test
new file mode 100644
index 00000000..cb6de7f9
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch.test
@@ -0,0 +1,31 @@
+--TEST--
+"batch" filter
+--TEMPLATE--
+{% for row in items|batch(3) %}
+  <div class=row>
+  {% for column in row %}
+    <div class=item>{{ column }}</div>
+  {% endfor %}
+  </div>
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'))
+--EXPECT--
+<div class=row>
+      <div class=item>a</div>
+      <div class=item>b</div>
+      <div class=item>c</div>
+    </div>
+  <div class=row>
+      <div class=item>d</div>
+      <div class=item>e</div>
+      <div class=item>f</div>
+    </div>
+  <div class=row>
+      <div class=item>g</div>
+      <div class=item>h</div>
+      <div class=item>i</div>
+    </div>
+  <div class=row>
+      <div class=item>j</div>
+    </div>
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_float.php b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_float.php
new file mode 100644
index 00000000..52de39cb
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_float.php
@@ -0,0 +1,31 @@
+--TEST--
+"batch" filter
+--TEMPLATE--
+{% for row in items|batch(3.1) %}
+  <div class=row>
+  {% for column in row %}
+    <div class=item>{{ column }}</div>
+  {% endfor %}
+  </div>
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'))
+--EXPECT--
+<div class=row>
+      <div class=item>a</div>
+      <div class=item>b</div>
+      <div class=item>c</div>
+    </div>
+  <div class=row>
+      <div class=item>d</div>
+      <div class=item>e</div>
+      <div class=item>f</div>
+    </div>
+  <div class=row>
+      <div class=item>g</div>
+      <div class=item>h</div>
+      <div class=item>i</div>
+    </div>
+  <div class=row>
+      <div class=item>j</div>
+    </div>
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_with_empty_fill.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_with_empty_fill.test
new file mode 100644
index 00000000..af996f24
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_with_empty_fill.test
@@ -0,0 +1,37 @@
+--TEST--
+"batch" filter
+--TEMPLATE--
+<table>
+{% for row in items|batch(3, '') %}
+  <tr>
+  {% for column in row %}
+    <td>{{ column }}</td>
+  {% endfor %}
+  </tr>
+{% endfor %}
+</table>
+--DATA--
+return array('items' => array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'))
+--EXPECT--
+<table>
+  <tr>
+      <td>a</td>
+      <td>b</td>
+      <td>c</td>
+    </tr>
+  <tr>
+      <td>d</td>
+      <td>e</td>
+      <td>f</td>
+    </tr>
+  <tr>
+      <td>g</td>
+      <td>h</td>
+      <td>i</td>
+    </tr>
+  <tr>
+      <td>j</td>
+      <td></td>
+      <td></td>
+    </tr>
+</table>
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_with_fill.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_with_fill.test
new file mode 100644
index 00000000..746295f1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/batch_with_fill.test
@@ -0,0 +1,37 @@
+--TEST--
+"batch" filter
+--TEMPLATE--
+<table>
+{% for row in items|batch(3, 'fill') %}
+  <tr>
+  {% for column in row %}
+    <td>{{ column }}</td>
+  {% endfor %}
+  </tr>
+{% endfor %}
+</table>
+--DATA--
+return array('items' => array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'))
+--EXPECT--
+<table>
+  <tr>
+      <td>a</td>
+      <td>b</td>
+      <td>c</td>
+    </tr>
+  <tr>
+      <td>d</td>
+      <td>e</td>
+      <td>f</td>
+    </tr>
+  <tr>
+      <td>g</td>
+      <td>h</td>
+      <td>i</td>
+    </tr>
+  <tr>
+      <td>j</td>
+      <td>fill</td>
+      <td>fill</td>
+    </tr>
+</table>
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/convert_encoding.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/convert_encoding.test
new file mode 100644
index 00000000..380b04bb
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/convert_encoding.test
@@ -0,0 +1,10 @@
+--TEST--
+"convert_encoding" filter
+--CONDITION--
+function_exists('iconv') || function_exists('mb_convert_encoding')
+--TEMPLATE--
+{{ "愛していますか？"|convert_encoding('ISO-2022-JP', 'UTF-8')|convert_encoding('UTF-8', 'ISO-2022-JP') }}
+--DATA--
+return array()
+--EXPECT--
+愛していますか？
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date.test
new file mode 100644
index 00000000..d40bb04a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date.test
@@ -0,0 +1,76 @@
+--TEST--
+"date" filter
+--TEMPLATE--
+{{ date1|date }}
+{{ date1|date('d/m/Y') }}
+{{ date1|date('d/m/Y H:i:s', 'Asia/Hong_Kong') }}
+{{ date1|date('d/m/Y H:i:s P', 'Asia/Hong_Kong') }}
+{{ date1|date('d/m/Y H:i:s P', 'America/Chicago') }}
+{{ date1|date('e') }}
+{{ date1|date('d/m/Y H:i:s') }}
+
+{{ date2|date }}
+{{ date2|date('d/m/Y') }}
+{{ date2|date('d/m/Y H:i:s', 'Asia/Hong_Kong') }}
+{{ date2|date('d/m/Y H:i:s', timezone1) }}
+{{ date2|date('d/m/Y H:i:s') }}
+
+{{ date3|date }}
+{{ date3|date('d/m/Y') }}
+
+{{ date4|date }}
+{{ date4|date('d/m/Y') }}
+
+{{ date5|date }}
+{{ date5|date('d/m/Y') }}
+
+{{ date6|date('d/m/Y H:i:s P', 'Europe/Paris') }}
+{{ date6|date('d/m/Y H:i:s P', 'Asia/Hong_Kong') }}
+{{ date6|date('d/m/Y H:i:s P', false) }}
+{{ date6|date('e', 'Europe/Paris') }}
+{{ date6|date('e', false) }}
+
+{{ date7|date }}
+--DATA--
+date_default_timezone_set('Europe/Paris');
+return array(
+    'date1' => mktime(13, 45, 0, 10, 4, 2010),
+    'date2' => new DateTime('2010-10-04 13:45'),
+    'date3' => '2010-10-04 13:45',
+    'date4' => 1286199900, // DateTime::createFromFormat('Y-m-d H:i', '2010-10-04 13:45', new DateTimeZone('UTC'))->getTimestamp() -- A unixtimestamp is always GMT
+    'date5' => -189291360, // DateTime::createFromFormat('Y-m-d H:i', '1964-01-02 03:04', new DateTimeZone('UTC'))->getTimestamp(),
+    'date6' => new DateTime('2010-10-04 13:45', new DateTimeZone('America/New_York')),
+    'date7' => '2010-01-28T15:00:00+05:00',
+    'timezone1' => new DateTimeZone('America/New_York'),
+)
+--EXPECT--
+October 4, 2010 13:45
+04/10/2010
+04/10/2010 19:45:00
+04/10/2010 19:45:00 +08:00
+04/10/2010 06:45:00 -05:00
+Europe/Paris
+04/10/2010 13:45:00
+
+October 4, 2010 13:45
+04/10/2010
+04/10/2010 19:45:00
+04/10/2010 07:45:00
+04/10/2010 13:45:00
+
+October 4, 2010 13:45
+04/10/2010
+
+October 4, 2010 15:45
+04/10/2010
+
+January 2, 1964 04:04
+02/01/1964
+
+04/10/2010 19:45:00 +02:00
+05/10/2010 01:45:00 +08:00
+04/10/2010 13:45:00 -04:00
+Europe/Paris
+America/New_York
+
+January 28, 2010 11:00
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_default_format.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_default_format.test
new file mode 100644
index 00000000..11a1ef4b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_default_format.test
@@ -0,0 +1,14 @@
+--TEST--
+"date" filter
+--TEMPLATE--
+{{ date1|date }}
+{{ date1|date('d/m/Y') }}
+--DATA--
+date_default_timezone_set('UTC');
+$twig->getExtension('core')->setDateFormat('Y-m-d', '%d days %h hours');
+return array(
+    'date1' => mktime(13, 45, 0, 10, 4, 2010),
+)
+--EXPECT--
+2010-10-04
+04/10/2010
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_default_format_interval.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_default_format_interval.test
new file mode 100644
index 00000000..e6d3707d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_default_format_interval.test
@@ -0,0 +1,16 @@
+--TEST--
+"date" filter (interval support as of PHP 5.3)
+--CONDITION--
+version_compare(phpversion(), '5.3.0', '>=')
+--TEMPLATE--
+{{ date2|date }}
+{{ date2|date('%d days') }}
+--DATA--
+date_default_timezone_set('UTC');
+$twig->getExtension('core')->setDateFormat('Y-m-d', '%d days %h hours');
+return array(
+    'date2' => new DateInterval('P2D'),
+)
+--EXPECT--
+2 days 0 hours
+2 days
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_interval.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_interval.test
new file mode 100644
index 00000000..0c8c6f1a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_interval.test
@@ -0,0 +1,19 @@
+--TEST--
+"date" filter (interval support as of PHP 5.3)
+--CONDITION--
+version_compare(phpversion(), '5.3.0', '>=')
+--TEMPLATE--
+{{ date1|date }}
+{{ date1|date('%d days %h hours') }}
+{{ date1|date('%d days %h hours', timezone1) }}
+--DATA--
+date_default_timezone_set('UTC');
+return array(
+    'date1' => new DateInterval('P2D'),
+    // This should have no effect on DateInterval formatting
+    'timezone1' => new DateTimeZone('America/New_York'),
+)
+--EXPECT--
+2 days
+2 days 0 hours
+2 days 0 hours
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_modify.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_modify.test
new file mode 100644
index 00000000..53d3a69c
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_modify.test
@@ -0,0 +1,14 @@
+--TEST--
+"date_modify" filter
+--TEMPLATE--
+{{ date1|date_modify('-1day')|date('Y-m-d H:i:s') }}
+{{ date2|date_modify('-1day')|date('Y-m-d H:i:s') }}
+--DATA--
+date_default_timezone_set('UTC');
+return array(
+    'date1' => '2010-10-04 13:45',
+    'date2' => new DateTime('2010-10-04 13:45'),
+)
+--EXPECT--
+2010-10-03 13:45:00
+2010-10-03 13:45:00
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_namedargs.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_namedargs.test
new file mode 100644
index 00000000..4ecde8a1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/date_namedargs.test
@@ -0,0 +1,13 @@
+--TEST--
+"date" filter
+--TEMPLATE--
+{{ date|date(format='d/m/Y H:i:s P', timezone='America/Chicago') }}
+{{ date|date(timezone='America/Chicago', format='d/m/Y H:i:s P') }}
+{{ date|date('d/m/Y H:i:s P', timezone='America/Chicago') }}
+--DATA--
+date_default_timezone_set('UTC');
+return array('date' => mktime(13, 45, 0, 10, 4, 2010))
+--EXPECT--
+04/10/2010 08:45:00 -05:00
+04/10/2010 08:45:00 -05:00
+04/10/2010 08:45:00 -05:00
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/default.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/default.test
new file mode 100644
index 00000000..0e4404b1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/default.test
@@ -0,0 +1,150 @@
+--TEST--
+"default" filter
+--TEMPLATE--
+Variable:
+{{ definedVar                  |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ zeroVar                     |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ emptyVar                    |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ nullVar                     |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ undefinedVar                |default('default') is sameas('default') ? 'ok' : 'ko' }}
+Array access:
+{{ nested.definedVar           |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ nested['definedVar']        |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ nested.zeroVar              |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ nested.emptyVar             |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ nested.nullVar              |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ nested.undefinedVar         |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ nested['undefinedVar']      |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ undefinedVar.foo            |default('default') is sameas('default') ? 'ok' : 'ko' }}
+Plain values:
+{{ 'defined'                   |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ 0                           |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ ''                          |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ null                        |default('default') is sameas('default') ? 'ok' : 'ko' }}
+Precedence:
+{{ 'o' ~ nullVar               |default('k') }}
+{{ 'o' ~ nested.nullVar        |default('k') }}
+Object methods:
+{{ object.foo                  |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ object.undefinedMethod      |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ object.getFoo()             |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ object.getFoo('a')          |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ object.undefinedMethod()    |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ object.undefinedMethod('a') |default('default') is sameas('default') ? 'ok' : 'ko' }}
+Deep nested:
+{{ nested.undefinedVar.foo.bar |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ nested.definedArray.0       |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ nested['definedArray'][0]   |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ object.self.foo             |default('default') is sameas('default') ? 'ko' : 'ok' }}
+{{ object.self.undefinedMethod |default('default') is sameas('default') ? 'ok' : 'ko' }}
+{{ object.undefinedMethod.self |default('default') is sameas('default') ? 'ok' : 'ko' }}
+--DATA--
+return array(
+    'definedVar' => 'defined',
+    'zeroVar'    => 0,
+    'emptyVar'   => '',
+    'nullVar'    => null,
+    'nested'     => array(
+        'definedVar'   => 'defined',
+        'zeroVar'      => 0,
+        'emptyVar'     => '',
+        'nullVar'      => null,
+        'definedArray' => array(0),
+    ),
+    'object' => new TwigTestFoo(),
+)
+--CONFIG--
+return array('strict_variables' => false)
+--EXPECT--
+Variable:
+ok
+ok
+ok
+ok
+ok
+Array access:
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+Plain values:
+ok
+ok
+ok
+ok
+Precedence:
+ok
+ok
+Object methods:
+ok
+ok
+ok
+ok
+ok
+ok
+Deep nested:
+ok
+ok
+ok
+ok
+ok
+ok
+--DATA--
+return array(
+    'definedVar' => 'defined',
+    'zeroVar'    => 0,
+    'emptyVar'   => '',
+    'nullVar'    => null,
+    'nested'     => array(
+        'definedVar'   => 'defined',
+        'zeroVar'      => 0,
+        'emptyVar'     => '',
+        'nullVar'      => null,
+        'definedArray' => array(0),
+    ),
+    'object' => new TwigTestFoo(),
+)
+--CONFIG--
+return array('strict_variables' => true)
+--EXPECT--
+Variable:
+ok
+ok
+ok
+ok
+ok
+Array access:
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+Plain values:
+ok
+ok
+ok
+ok
+Precedence:
+ok
+ok
+Object methods:
+ok
+ok
+ok
+ok
+ok
+ok
+Deep nested:
+ok
+ok
+ok
+ok
+ok
+ok
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/dynamic_filter.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/dynamic_filter.test
new file mode 100644
index 00000000..93c5913f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/dynamic_filter.test
@@ -0,0 +1,10 @@
+--TEST--
+dynamic filter
+--TEMPLATE--
+{{ 'bar'|foo_path }}
+{{ 'bar'|a_foo_b_bar }}
+--DATA--
+return array()
+--EXPECT--
+foo/bar
+a/b/bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/escape.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/escape.test
new file mode 100644
index 00000000..a606c106
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/escape.test
@@ -0,0 +1,8 @@
+--TEST--
+"escape" filter
+--TEMPLATE--
+{{ "foo <br />"|e }}
+--DATA--
+return array()
+--EXPECT--
+foo &lt;br /&gt;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/escape_non_supported_charset.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/escape_non_supported_charset.test
new file mode 100644
index 00000000..bba26a0d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/escape_non_supported_charset.test
@@ -0,0 +1,8 @@
+--TEST--
+"escape" filter
+--TEMPLATE--
+{{ "愛していますか？ <br />"|e }}
+--DATA--
+return array()
+--EXPECT--
+愛していますか？ &lt;br /&gt;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/first.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/first.test
new file mode 100644
index 00000000..853465b6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/first.test
@@ -0,0 +1,14 @@
+--TEST--
+"first" filter
+--TEMPLATE--
+{{ [1, 2, 3, 4]|first }}
+{{ {a: 1, b: 2, c: 3, d: 4}|first }}
+{{ '1234'|first }}
+{{ arr|first }}
+--DATA--
+return array('arr' => new ArrayObject(array(1, 2, 3, 4)))
+--EXPECT--
+1
+1
+1
+1
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/force_escape.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/force_escape.test
new file mode 100644
index 00000000..85a9b717
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/force_escape.test
@@ -0,0 +1,18 @@
+--TEST--
+"escape" filter
+--TEMPLATE--
+{% set foo %}
+    foo<br />
+{% endset %}
+
+{{ foo|e('html') -}}
+{{ foo|e('js') }}
+{% autoescape true %}
+    {{ foo }}
+{% endautoescape %}
+--DATA--
+return array()
+--EXPECT--
+    foo&lt;br /&gt;
+\x20\x20\x20\x20foo\x3Cbr\x20\x2F\x3E\x0A
+        foo<br />
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/format.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/format.test
new file mode 100644
index 00000000..97221ff8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/format.test
@@ -0,0 +1,8 @@
+--TEST--
+"format" filter
+--TEMPLATE--
+{{ string|format(foo, 3) }}
+--DATA--
+return array('string' => '%s/%d', 'foo' => 'bar')
+--EXPECT--
+bar/3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/join.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/join.test
new file mode 100644
index 00000000..b342c174
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/join.test
@@ -0,0 +1,12 @@
+--TEST--
+"join" filter
+--TEMPLATE--
+{{ ["foo", "bar"]|join(', ') }}
+{{ foo|join(', ') }}
+{{ bar|join(', ') }}
+--DATA--
+return array('foo' => new TwigTestFoo(), 'bar' => new ArrayObject(array(3, 4)))
+--EXPECT--
+foo, bar
+1, 2
+3, 4
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/json_encode.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/json_encode.test
new file mode 100644
index 00000000..1738d40c
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/json_encode.test
@@ -0,0 +1,12 @@
+--TEST--
+"json_encode" filter
+--TEMPLATE--
+{{ "foo"|json_encode|raw }}
+{{ foo|json_encode|raw }}
+{{ [foo, "foo"]|json_encode|raw }}
+--DATA--
+return array('foo' => new Twig_Markup('foo', 'UTF-8'))
+--EXPECT--
+"foo"
+"foo"
+["foo","foo"]
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/last.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/last.test
new file mode 100644
index 00000000..ca3ac0cf
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/last.test
@@ -0,0 +1,14 @@
+--TEST--
+"last" filter
+--TEMPLATE--
+{{ [1, 2, 3, 4]|last }}
+{{ {a: 1, b: 2, c: 3, d: 4}|last }}
+{{ '1234'|last }}
+{{ arr|last }}
+--DATA--
+return array('arr' => new ArrayObject(array(1, 2, 3, 4)))
+--EXPECT--
+4
+4
+4
+4
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/length.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/length.test
new file mode 100644
index 00000000..3347474d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/length.test
@@ -0,0 +1,14 @@
+--TEST--
+"length" filter
+--TEMPLATE--
+{{ array|length }}
+{{ string|length }}
+{{ number|length }}
+{{ markup|length }}
+--DATA--
+return array('array' => array(1, 4), 'string' => 'foo', 'number' => 1000, 'markup' => new Twig_Markup('foo', 'UTF-8'))
+--EXPECT--
+2
+3
+4
+3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/length_utf8.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/length_utf8.test
new file mode 100644
index 00000000..5d5e2436
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/length_utf8.test
@@ -0,0 +1,12 @@
+--TEST--
+"length" filter
+--CONDITION--
+function_exists('mb_get_info')
+--TEMPLATE--
+{{ string|length }}
+{{ markup|length }}
+--DATA--
+return array('string' => 'été', 'markup' => new Twig_Markup('foo', 'UTF-8'))
+--EXPECT--
+3
+3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/merge.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/merge.test
new file mode 100644
index 00000000..2bd3d4c0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/merge.test
@@ -0,0 +1,16 @@
+--TEST--
+"merge" filter
+--TEMPLATE--
+{{ items|merge({'bar': 'foo'})|join }}
+{{ items|merge({'bar': 'foo'})|keys|join }}
+{{ {'bar': 'foo'}|merge(items)|join }}
+{{ {'bar': 'foo'}|merge(items)|keys|join }}
+{{ numerics|merge([4, 5, 6])|join }}
+--DATA--
+return array('items' => array('foo' => 'bar'), 'numerics' => array(1, 2, 3))
+--EXPECT--
+barfoo
+foobar
+foobar
+barfoo
+123456
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/nl2br.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/nl2br.test
new file mode 100644
index 00000000..6545a9bb
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/nl2br.test
@@ -0,0 +1,14 @@
+--TEST--
+"nl2br" filter
+--TEMPLATE--
+{{ "I like Twig.\nYou will like it too.\n\nEverybody like it!"|nl2br }}
+{{ text|nl2br }}
+--DATA--
+return array('text' => "If you have some <strong>HTML</strong>\nit will be escaped.")
+--EXPECT--
+I like Twig.<br />
+You will like it too.<br />
+<br />
+Everybody like it!
+If you have some &lt;strong&gt;HTML&lt;/strong&gt;<br />
+it will be escaped.
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/number_format.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/number_format.test
new file mode 100644
index 00000000..639a8659
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/number_format.test
@@ -0,0 +1,18 @@
+--TEST--
+"number_format" filter
+--TEMPLATE--
+{{ 20|number_format }}
+{{ 20.25|number_format }}
+{{ 20.25|number_format(2) }}
+{{ 20.25|number_format(2, ',') }}
+{{ 1020.25|number_format(2, ',') }}
+{{ 1020.25|number_format(2, ',', '.') }}
+--DATA--
+return array();
+--EXPECT--
+20
+20
+20.25
+20,25
+1,020,25
+1.020,25
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/number_format_default.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/number_format_default.test
new file mode 100644
index 00000000..c6903cc7
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/number_format_default.test
@@ -0,0 +1,21 @@
+--TEST--
+"number_format" filter with defaults.
+--TEMPLATE--
+{{ 20|number_format }}
+{{ 20.25|number_format }}
+{{ 20.25|number_format(1) }}
+{{ 20.25|number_format(2, ',') }}
+{{ 1020.25|number_format }}
+{{ 1020.25|number_format(2, ',') }}
+{{ 1020.25|number_format(2, ',', '.') }}
+--DATA--
+$twig->getExtension('core')->setNumberFormat(2, '!', '=');
+return array();
+--EXPECT--
+20!00
+20!25
+20!3
+20,25
+1=020!25
+1=020,25
+1.020,25
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/replace.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/replace.test
new file mode 100644
index 00000000..4021660b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/replace.test
@@ -0,0 +1,8 @@
+--TEST--
+"replace" filter
+--TEMPLATE--
+{{ "I like %this% and %that%."|replace({'%this%': "foo", '%that%': "bar"}) }}
+--DATA--
+return array()
+--EXPECT--
+I like foo and bar.
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/reverse.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/reverse.test
new file mode 100644
index 00000000..7948ac45
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/reverse.test
@@ -0,0 +1,18 @@
+--TEST--
+"reverse" filter
+--TEMPLATE--
+{{ [1, 2, 3, 4]|reverse|join('') }}
+{{ '1234évènement'|reverse }}
+{{ arr|reverse|join('') }}
+{{ {'a': 'c', 'b': 'a'}|reverse()|join(',') }}
+{{ {'a': 'c', 'b': 'a'}|reverse(preserveKeys=true)|join(glue=',') }}
+{{ {'a': 'c', 'b': 'a'}|reverse(preserve_keys=true)|join(glue=',') }}
+--DATA--
+return array('arr' => new ArrayObject(array(1, 2, 3, 4)))
+--EXPECT--
+4321
+tnemenèvé4321
+4321
+a,c
+a,c
+a,c
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/slice.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/slice.test
new file mode 100644
index 00000000..b37ad651
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/slice.test
@@ -0,0 +1,42 @@
+--TEST--
+"slice" filter
+--TEMPLATE--
+{{ [1, 2, 3, 4][1:2]|join('') }}
+{{ {a: 1, b: 2, c: 3, d: 4}[1:2]|join('') }}
+{{ [1, 2, 3, 4][start:length]|join('') }}
+{{ [1, 2, 3, 4]|slice(1, 2)|join('') }}
+{{ [1, 2, 3, 4]|slice(1, 2)|keys|join('') }}
+{{ [1, 2, 3, 4]|slice(1, 2, true)|keys|join('') }}
+{{ {a: 1, b: 2, c: 3, d: 4}|slice(1, 2)|join('') }}
+{{ {a: 1, b: 2, c: 3, d: 4}|slice(1, 2)|keys|join('') }}
+{{ '1234'|slice(1, 2) }}
+{{ '1234'[1:2] }}
+{{ arr|slice(1, 2)|join('') }}
+{{ arr[1:2]|join('') }}
+
+{{ [1, 2, 3, 4]|slice(1)|join('') }}
+{{ [1, 2, 3, 4][1:]|join('') }}
+{{ '1234'|slice(1) }}
+{{ '1234'[1:] }}
+{{ '1234'[:1] }}
+--DATA--
+return array('start' => 1, 'length' => 2, 'arr' => new ArrayObject(array(1, 2, 3, 4)))
+--EXPECT--
+23
+23
+23
+23
+01
+12
+23
+bc
+23
+23
+23
+23
+
+234
+234
+234
+234
+1
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/sort.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/sort.test
new file mode 100644
index 00000000..21d575f1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/sort.test
@@ -0,0 +1,10 @@
+--TEST--
+"sort" filter
+--TEMPLATE--
+{{ array1|sort|join }}
+{{ array2|sort|join }}
+--DATA--
+return array('array1' => array(4, 1), 'array2' => array('foo', 'bar'))
+--EXPECT--
+14
+barfoo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/special_chars.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/special_chars.test
new file mode 100644
index 00000000..dbaf7dc9
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/special_chars.test
@@ -0,0 +1,8 @@
+--TEST--
+"§" custom filter
+--TEMPLATE--
+{{ 'foo'|§ }}
+--DATA--
+return array()
+--EXPECT--
+§foo§
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/split.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/split.test
new file mode 100644
index 00000000..ce8ec9ce
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/split.test
@@ -0,0 +1,18 @@
+--TEST--
+"split" filter
+--TEMPLATE--
+{{ "one,two,three,four,five"|split(',')|join('-') }}
+{{ foo|split(',')|join('-') }}
+{{ foo|split(',', 3)|join('-') }}
+{{ baz|split('')|join('-') }}
+{{ baz|split('', 2)|join('-') }}
+{{ foo|split(',', -2)|join('-') }}
+--DATA--
+return array('foo' => "one,two,three,four,five", 'baz' => '12345',)
+--EXPECT--
+one-two-three-four-five
+one-two-three-four-five
+one-two-three,four,five
+1-2-3-4-5
+12-34-5
+one-two-three
\ No newline at end of file
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/trim.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/trim.test
new file mode 100644
index 00000000..31920625
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/trim.test
@@ -0,0 +1,12 @@
+--TEST--
+"trim" filter
+--TEMPLATE--
+{{ "  I like Twig.  "|trim }}
+{{ text|trim }}
+{{ "  foo/"|trim("/") }}
+--DATA--
+return array('text' => "  If you have some <strong>HTML</strong> it will be escaped.  ")
+--EXPECT--
+I like Twig.
+If you have some &lt;strong&gt;HTML&lt;/strong&gt; it will be escaped.
+  foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/urlencode.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/urlencode.test
new file mode 100644
index 00000000..de956e7a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/filters/urlencode.test
@@ -0,0 +1,12 @@
+--TEST--
+"url_encode" filter
+--TEMPLATE--
+{{ {foo: "bar", number: 3, "spéßi%l": "e%c0d@d", "spa ce": ""}|url_encode }}
+{{ {foo: "bar", number: 3, "spéßi%l": "e%c0d@d", "spa ce": ""}|url_encode|raw }}
+{{ {}|url_encode|default("default") }}
+--DATA--
+return array()
+--EXPECT--
+foo=bar&amp;number=3&amp;sp%C3%A9%C3%9Fi%25l=e%25c0d%40d&amp;spa+ce=
+foo=bar&number=3&sp%C3%A9%C3%9Fi%25l=e%25c0d%40d&spa+ce=
+default
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/attribute.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/attribute.test
new file mode 100644
index 00000000..16ae1e8b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/attribute.test
@@ -0,0 +1,12 @@
+--TEST--
+"attribute" function
+--TEMPLATE--
+{{ attribute(obj, method) }}
+{{ attribute(array, item) }}
+{{ attribute(obj, "bar", ["a", "b"]) }}
+--DATA--
+return array('obj' => new TwigTestFoo(), 'method' => 'foo', 'array' => array('foo' => 'bar'), 'item' => 'foo')
+--EXPECT--
+foo
+bar
+bar_a-b
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/block.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/block.test
new file mode 100644
index 00000000..8e54059a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/block.test
@@ -0,0 +1,12 @@
+--TEST--
+"block" function
+--TEMPLATE--
+{% extends 'base.twig' %}
+{% block bar %}BAR{% endblock %}
+--TEMPLATE(base.twig)--
+{% block foo %}{{ block('bar') }}{% endblock %}
+{% block bar %}BAR_BASE{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+BARBAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/constant.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/constant.test
new file mode 100644
index 00000000..63128791
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/constant.test
@@ -0,0 +1,10 @@
+--TEST--
+"constant" function
+--TEMPLATE--
+{{ constant('DATE_W3C') == expect ? 'true' : 'false' }}
+{{ constant('ARRAY_AS_PROPS', object) }}
+--DATA--
+return array('expect' => DATE_W3C, 'object' => new ArrayObject(array('hi')));
+--EXPECT--
+true
+2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/cycle.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/cycle.test
new file mode 100644
index 00000000..522a63b8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/cycle.test
@@ -0,0 +1,16 @@
+--TEST--
+"cycle" function
+--TEMPLATE--
+{% for i in 0..6 %}
+{{ cycle(array1, i) }}-{{ cycle(array2, i) }}
+{% endfor %}
+--DATA--
+return array('array1' => array('odd', 'even'), 'array2' => array('apple', 'orange', 'citrus'))
+--EXPECT--
+odd-apple
+even-orange
+odd-citrus
+even-apple
+odd-orange
+even-citrus
+odd-apple
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/date.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/date.test
new file mode 100644
index 00000000..a4c97167
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/date.test
@@ -0,0 +1,27 @@
+--TEST--
+"date" function
+--TEMPLATE--
+{{ date() == date('now') ? 'OK' : 'KO' }}
+{{ date() > date('-1day') ? 'OK' : 'KO' }}
+{{ date(date1) == date('2010-10-04 13:45') ? 'OK' : 'KO' }}
+{{ date(date2) == date('2010-10-04 13:45') ? 'OK' : 'KO' }}
+{{ date(date3) == date('2010-10-04 13:45') ? 'OK' : 'KO' }}
+{{ date(date4) == date('2010-10-04 13:45') ? 'OK' : 'KO' }}
+{{ date(date5) == date('1964-01-02 03:04') ? 'OK' : 'KO' }}
+--DATA--
+date_default_timezone_set('UTC');
+return array(
+    'date1' => mktime(13, 45, 0, 10, 4, 2010),
+    'date2' => new DateTime('2010-10-04 13:45'),
+    'date3' => '2010-10-04 13:45',
+    'date4' => 1286199900, // DateTime::createFromFormat('Y-m-d H:i', '2010-10-04 13:45', new DateTimeZone('UTC'))->getTimestamp() -- A unixtimestamp is always GMT
+    'date5' => -189291360, // DateTime::createFromFormat('Y-m-d H:i', '1964-01-02 03:04', new DateTimeZone('UTC'))->getTimestamp(),
+)
+--EXPECT--
+OK
+OK
+OK
+OK
+OK
+OK
+OK
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/date_namedargs.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/date_namedargs.test
new file mode 100644
index 00000000..b9dd9e38
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/date_namedargs.test
@@ -0,0 +1,11 @@
+--TEST--
+"date" function
+--TEMPLATE--
+{{ date(date, "America/New_York")|date('d/m/Y H:i:s P', false) }}
+{{ date(timezone="America/New_York", date=date)|date('d/m/Y H:i:s P', false) }}
+--DATA--
+date_default_timezone_set('UTC');
+return array('date' => mktime(13, 45, 0, 10, 4, 2010))
+--EXPECT--
+04/10/2010 09:45:00 -04:00
+04/10/2010 09:45:00 -04:00
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dump.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dump.test
new file mode 100644
index 00000000..f4072375
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dump.test
@@ -0,0 +1,16 @@
+--TEST--
+"dump" function
+--CONDITION--
+!extension_loaded('xdebug')
+--TEMPLATE--
+{{ dump('foo') }}
+{{ dump('foo', 'bar') }}
+--DATA--
+return array('foo' => 'foo', 'bar' => 'bar')
+--CONFIG--
+return array('debug' => true, 'autoescape' => false);
+--EXPECT--
+string(3) "foo"
+
+string(3) "foo"
+string(3) "bar"
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dump_array.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dump_array.test
new file mode 100644
index 00000000..889b7a92
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dump_array.test
@@ -0,0 +1,19 @@
+--TEST--
+"dump" function, xdebug is not loaded or xdebug <2.2-dev is loaded
+--CONDITION--
+!extension_loaded('xdebug') || (($r = new ReflectionExtension('xdebug')) && version_compare($r->getVersion(), '2.2-dev', '<'))
+--TEMPLATE--
+{{ dump() }}
+--DATA--
+return array('foo' => 'foo', 'bar' => 'bar')
+--CONFIG--
+return array('debug' => true, 'autoescape' => false);
+--EXPECT--
+array(3) {
+  ["foo"]=>
+  string(3) "foo"
+  ["bar"]=>
+  string(3) "bar"
+  ["global"]=>
+  string(6) "global"
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dynamic_function.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dynamic_function.test
new file mode 100644
index 00000000..913fbc99
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/dynamic_function.test
@@ -0,0 +1,10 @@
+--TEST--
+dynamic function
+--TEMPLATE--
+{{ foo_path('bar') }}
+{{ a_foo_b_bar('bar') }}
+--DATA--
+return array()
+--EXPECT--
+foo/bar
+a/b/bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/assignment.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/assignment.test
new file mode 100644
index 00000000..b7653b4e
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/assignment.test
@@ -0,0 +1,13 @@
+--TEST--
+"include" function
+--TEMPLATE--
+{% set tmp = include("foo.twig") %}
+
+FOO{{ tmp }}BAR
+--TEMPLATE(foo.twig)--
+FOOBAR
+--DATA--
+return array()
+--EXPECT--
+FOO
+FOOBARBAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/autoescaping.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/autoescaping.test
new file mode 100644
index 00000000..56f8f3b5
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/autoescaping.test
@@ -0,0 +1,10 @@
+--TEST--
+"include" function is safe for auto-escaping
+--TEMPLATE--
+{{ include("foo.twig") }}
+--TEMPLATE(foo.twig)--
+<p>Test</p>
+--DATA--
+return array()
+--EXPECT--
+<p>Test</p>
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/basic.test
new file mode 100644
index 00000000..a434182a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/basic.test
@@ -0,0 +1,17 @@
+--TEST--
+"include" function
+--TEMPLATE--
+FOO
+{{ include("foo.twig") }}
+
+BAR
+--TEMPLATE(foo.twig)--
+FOOBAR
+--DATA--
+return array()
+--EXPECT--
+FOO
+
+FOOBAR
+
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/expression.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/expression.test
new file mode 100644
index 00000000..aba30ce3
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/expression.test
@@ -0,0 +1,17 @@
+--TEST--
+"include" function allows expressions for the template to include
+--TEMPLATE--
+FOO
+{{ include(foo) }}
+
+BAR
+--TEMPLATE(foo.twig)--
+FOOBAR
+--DATA--
+return array('foo' => 'foo.twig')
+--EXPECT--
+FOO
+
+FOOBAR
+
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/ignore_missing.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/ignore_missing.test
new file mode 100644
index 00000000..43a2ccc2
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/ignore_missing.test
@@ -0,0 +1,10 @@
+--TEST--
+"include" function
+--TEMPLATE--
+{{ include(["foo.twig", "bar.twig"], ignore_missing = true) }}
+{{ include("foo.twig", ignore_missing = true) }}
+{{ include("foo.twig", ignore_missing = true, variables = {}) }}
+{{ include("foo.twig", ignore_missing = true, variables = {}, with_context = true) }}
+--DATA--
+return array()
+--EXPECT--
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/missing.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/missing.test
new file mode 100644
index 00000000..4d2f6cf1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/missing.test
@@ -0,0 +1,8 @@
+--TEST--
+"include" function
+--TEMPLATE--
+{{ include("foo.twig") }}
+--DATA--
+return array();
+--EXCEPTION--
+Twig_Error_Loader: Template "foo.twig" is not defined in "index.twig" at line 2.
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/missing_nested.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/missing_nested.test
new file mode 100644
index 00000000..78fddc7a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/missing_nested.test
@@ -0,0 +1,16 @@
+--TEST--
+"include" function
+--TEMPLATE--
+{% extends "base.twig" %}
+
+{% block content %}
+    {{ parent() }}
+{% endblock %}
+--TEMPLATE(base.twig)--
+{% block content %}
+    {{ include("foo.twig") }}
+{% endblock %}
+--DATA--
+return array();
+--EXCEPTION--
+Twig_Error_Loader: Template "foo.twig" is not defined in "base.twig" at line 3.
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/sandbox.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/sandbox.test
new file mode 100644
index 00000000..788a2ab0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/sandbox.test
@@ -0,0 +1,10 @@
+--TEST--
+"include" tag sandboxed
+--TEMPLATE--
+{{ include("foo.twig", sandboxed = true) }}
+--TEMPLATE(foo.twig)--
+{{ foo|e }}
+--DATA--
+return array()
+--EXCEPTION--
+Twig_Sandbox_SecurityError: Filter "e" is not allowed in "index.twig" at line 2.
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/template_instance.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/template_instance.test
new file mode 100644
index 00000000..18d405a0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/template_instance.test
@@ -0,0 +1,10 @@
+--TEST--
+"include" function accepts Twig_Template instance
+--TEMPLATE--
+{{ include(foo) }} FOO
+--TEMPLATE(foo.twig)--
+BAR
+--DATA--
+return array('foo' => $twig->loadTemplate('foo.twig'))
+--EXPECT--
+BAR FOO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/templates_as_array.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/templates_as_array.test
new file mode 100644
index 00000000..1a810068
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/templates_as_array.test
@@ -0,0 +1,12 @@
+--TEST--
+"include" function
+--TEMPLATE--
+{{ include(["foo.twig", "bar.twig"]) }}
+{{- include(["bar.twig", "foo.twig"]) }}
+--TEMPLATE(foo.twig)--
+foo
+--DATA--
+return array()
+--EXPECT--
+foo
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/with_context.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/with_context.test
new file mode 100644
index 00000000..35611fbb
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/with_context.test
@@ -0,0 +1,16 @@
+--TEST--
+"include" function accept variables and with_context
+--TEMPLATE--
+{{ include("foo.twig") }}
+{{- include("foo.twig", with_context = false) }}
+{{- include("foo.twig", {'foo1': 'bar'}) }}
+{{- include("foo.twig", {'foo1': 'bar'}, with_context = false) }}
+--TEMPLATE(foo.twig)--
+{% for k, v in _context %}{{ k }},{% endfor %}
+--DATA--
+return array('foo' => 'bar')
+--EXPECT--
+foo,global,_parent,
+global,_parent,
+foo,global,foo1,_parent,
+foo1,global,_parent,
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/with_variables.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/with_variables.test
new file mode 100644
index 00000000..b2ace940
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/include/with_variables.test
@@ -0,0 +1,12 @@
+--TEST--
+"include" function accept variables
+--TEMPLATE--
+{{ include("foo.twig", {'foo': 'bar'}) }}
+{{- include("foo.twig", vars) }}
+--TEMPLATE(foo.twig)--
+{{ foo }}
+--DATA--
+return array('vars' => array('foo' => 'bar'))
+--EXPECT--
+bar
+bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/range.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/range.test
new file mode 100644
index 00000000..e0377c8d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/range.test
@@ -0,0 +1,8 @@
+--TEST--
+"range" function
+--TEMPLATE--
+{{ range(low=0+1, high=10+0, step=2)|join(',') }}
+--DATA--
+return array()
+--EXPECT--
+1,3,5,7,9
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/special_chars.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/special_chars.test
new file mode 100644
index 00000000..30c3df51
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/special_chars.test
@@ -0,0 +1,8 @@
+--TEST--
+"§" custom function
+--TEMPLATE--
+{{ §('foo') }}
+--DATA--
+return array()
+--EXPECT--
+§foo§
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/template_from_string.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/template_from_string.test
new file mode 100644
index 00000000..41428da1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/functions/template_from_string.test
@@ -0,0 +1,11 @@
+--TEST--
+"template_from_string" function
+--TEMPLATE--
+{% include template_from_string(template) %}
+
+{% include template_from_string("Hello {{ name }}") %}
+--DATA--
+return array('name' => 'Fabien', 'template' => "Hello {{ name }}")
+--EXPECT--
+Hello Fabien
+Hello Fabien
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/default_values.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/default_values.test
new file mode 100644
index 00000000..4ccff7b6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/default_values.test
@@ -0,0 +1,16 @@
+--TEST--
+macro
+--TEMPLATE--
+{% from _self import test %}
+
+{% macro test(a, b = 'bar') -%}
+{{ a }}{{ b }}
+{%- endmacro %}
+
+{{ test('foo') }}
+{{ test('bar', 'foo') }}
+--DATA--
+return array();
+--EXPECT--
+foobar
+barfoo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/nested_calls.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/nested_calls.test
new file mode 100644
index 00000000..cd254281
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/nested_calls.test
@@ -0,0 +1,18 @@
+--TEST--
+macro
+--TEMPLATE--
+{% import _self as macros %}
+
+{% macro foo(data) %}
+    {{ data }}
+{% endmacro %}
+
+{% macro bar() %}
+    <br />
+{% endmacro %}
+
+{{ macros.foo(macros.bar()) }}
+--DATA--
+return array();
+--EXPECT--
+<br />
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/reserved_variables.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/reserved_variables.test
new file mode 100644
index 00000000..cbfb921b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/reserved_variables.test
@@ -0,0 +1,14 @@
+--TEST--
+macro
+--TEMPLATE--
+{% from _self import test %}
+
+{% macro test(this) -%}
+    {{ this }}
+{%- endmacro %}
+
+{{ test(this) }}
+--DATA--
+return array('this' => 'foo');
+--EXPECT--
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/simple.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/simple.test
new file mode 100644
index 00000000..6a366cdf
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/simple.test
@@ -0,0 +1,22 @@
+--TEST--
+macro
+--TEMPLATE--
+{% import _self as test %}
+{% from _self import test %}
+
+{% macro test(a, b) -%}
+    {{ a|default('a') }}<br />
+    {{- b|default('b') }}<br />
+{%- endmacro %}
+
+{{ test.test() }}
+{{ test() }}
+{{ test.test(1, "c") }}
+{{ test(1, "c") }}
+--DATA--
+return array();
+--EXPECT--
+a<br />b<br />
+a<br />b<br />
+1<br />c<br />
+1<br />c<br />
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/with_filters.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/with_filters.test
new file mode 100644
index 00000000..685626f2
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/macros/with_filters.test
@@ -0,0 +1,14 @@
+--TEST--
+macro with a filter
+--TEMPLATE--
+{% import _self as test %}
+
+{% macro test() %}
+    {% filter escape %}foo<br />{% endfilter %}
+{% endmacro %}
+
+{{ test.test() }}
+--DATA--
+return array();
+--EXPECT--
+foo&lt;br /&gt;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/empty_token.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/empty_token.test
new file mode 100644
index 00000000..65f6cd2b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/empty_token.test
@@ -0,0 +1,8 @@
+--TEST--
+Twig outputs 0 nodes correctly
+--TEMPLATE--
+{{ foo }}0{{ foo }}
+--DATA--
+return array('foo' => 'foo')
+--EXPECT--
+foo0foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/simple_xml_element.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/simple_xml_element.test
new file mode 100644
index 00000000..110aef82
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/simple_xml_element.test
@@ -0,0 +1,17 @@
+--TEST--
+Twig is able to deal with SimpleXMLElement instances as variables
+--CONDITION--
+version_compare(phpversion(), '5.3.0', '>=')
+--TEMPLATE--
+Hello '{{ images.image.0.group }}'!
+{{ images.children().count() }}
+{% for image in images %}
+    - {{ image.group }}
+{% endfor %}
+--DATA--
+return array('images' => new SimpleXMLElement('<images><image><group>foo</group></image><image><group>bar</group></image></images>'))
+--EXPECT--
+Hello 'foo'!
+2
+    - foo
+    - bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/strings_like_numbers.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/strings_like_numbers.test
new file mode 100644
index 00000000..e18e1107
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/regression/strings_like_numbers.test
@@ -0,0 +1,8 @@
+--TEST--
+Twig does not confuse strings with integers in getAttribute()
+--TEMPLATE--
+{{ hash['2e2'] }}
+--DATA--
+return array('hash' => array('2e2' => 'works'))
+--EXPECT--
+works
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/basic.test
new file mode 100644
index 00000000..2f6a3e1a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/basic.test
@@ -0,0 +1,26 @@
+--TEST--
+"autoescape" tag applies escaping on its children
+--TEMPLATE--
+{% autoescape %}
+{{ var }}<br />
+{% endautoescape %}
+{% autoescape 'html' %}
+{{ var }}<br />
+{% endautoescape %}
+{% autoescape false %}
+{{ var }}<br />
+{% endautoescape %}
+{% autoescape true %}
+{{ var }}<br />
+{% endautoescape %}
+{% autoescape false %}
+{{ var }}<br />
+{% endautoescape %}
+--DATA--
+return array('var' => '<br />')
+--EXPECT--
+&lt;br /&gt;<br />
+&lt;br /&gt;<br />
+<br /><br />
+&lt;br /&gt;<br />
+<br /><br />
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/blocks.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/blocks.test
new file mode 100644
index 00000000..05ab83ce
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/blocks.test
@@ -0,0 +1,12 @@
+--TEST--
+"autoescape" tag applies escaping on embedded blocks
+--TEMPLATE--
+{% autoescape 'html' %}
+  {% block foo %}
+    {{ var }}
+  {% endblock %}
+{% endautoescape %}
+--DATA--
+return array('var' => '<br />')
+--EXPECT--
+&lt;br /&gt;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/double_escaping.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/double_escaping.test
new file mode 100644
index 00000000..9c097246
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/double_escaping.test
@@ -0,0 +1,10 @@
+--TEST--
+"autoescape" tag does not double-escape
+--TEMPLATE--
+{% autoescape 'html' %}
+{{ var|escape }}
+{% endautoescape %}
+--DATA--
+return array('var' => '<br />')
+--EXPECT--
+&lt;br /&gt;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/functions.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/functions.test
new file mode 100644
index 00000000..ce7ea789
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/functions.test
@@ -0,0 +1,83 @@
+--TEST--
+"autoescape" tag applies escaping after calling functions
+--TEMPLATE--
+
+autoescape false
+{% autoescape false %}
+
+safe_br
+{{ safe_br() }}
+
+unsafe_br
+{{ unsafe_br() }}
+
+{% endautoescape %}
+
+autoescape 'html'
+{% autoescape 'html' %}
+
+safe_br
+{{ safe_br() }}
+
+unsafe_br
+{{ unsafe_br() }}
+
+unsafe_br()|raw
+{{ (unsafe_br())|raw }}
+
+safe_br()|escape
+{{ (safe_br())|escape }}
+
+safe_br()|raw
+{{ (safe_br())|raw }}
+
+unsafe_br()|escape
+{{ (unsafe_br())|escape }}
+
+{% endautoescape %}
+
+autoescape js
+{% autoescape 'js' %}
+
+safe_br
+{{ safe_br() }}
+
+{% endautoescape %}
+--DATA--
+return array()
+--EXPECT--
+
+autoescape false
+
+safe_br
+<br />
+
+unsafe_br
+<br />
+
+
+autoescape 'html'
+
+safe_br
+<br />
+
+unsafe_br
+&lt;br /&gt;
+
+unsafe_br()|raw
+<br />
+
+safe_br()|escape
+&lt;br /&gt;
+
+safe_br()|raw
+<br />
+
+unsafe_br()|escape
+&lt;br /&gt;
+
+
+autoescape js
+
+safe_br
+\x3Cbr\x20\x2F\x3E
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/literal.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/literal.test
new file mode 100644
index 00000000..e389d4dd
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/literal.test
@@ -0,0 +1,45 @@
+--TEST--
+"autoescape" tag does not apply escaping on literals
+--TEMPLATE--
+{% autoescape 'html' %}
+
+1. Simple literal
+{{ "<br />" }}
+
+2. Conditional expression with only literals
+{{ true ? "<br />" : "<br>" }}
+
+3. Conditional expression with a variable
+{{ true ? "<br />" : someVar }}
+
+4. Nested conditionals with only literals
+{{ true ? (true ? "<br />" : "<br>") : "\n" }}
+
+5. Nested conditionals with a variable
+{{ true ? (true ? "<br />" : someVar) : "\n" }}
+
+6. Nested conditionals with a variable marked safe
+{{ true ? (true ? "<br />" : someVar|raw) : "\n" }}
+
+{% endautoescape %}
+--DATA--
+return array()
+--EXPECT--
+
+1. Simple literal
+<br />
+
+2. Conditional expression with only literals
+<br />
+
+3. Conditional expression with a variable
+&lt;br /&gt;
+
+4. Nested conditionals with only literals
+<br />
+
+5. Nested conditionals with a variable
+&lt;br /&gt;
+
+6. Nested conditionals with a variable marked safe
+<br />
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/nested.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/nested.test
new file mode 100644
index 00000000..798e6fea
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/nested.test
@@ -0,0 +1,26 @@
+--TEST--
+"autoescape" tags can be nested at will
+--TEMPLATE--
+{{ var }}
+{% autoescape 'html' %}
+  {{ var }}
+  {% autoescape false %}
+    {{ var }}
+    {% autoescape 'html' %}
+      {{ var }}
+    {% endautoescape %}
+    {{ var }}
+  {% endautoescape %}
+  {{ var }}
+{% endautoescape %}
+{{ var }}
+--DATA--
+return array('var' => '<br />')
+--EXPECT--
+&lt;br /&gt;
+  &lt;br /&gt;
+      <br />
+          &lt;br /&gt;
+        <br />
+    &lt;br /&gt;
+&lt;br /&gt;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/objects.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/objects.test
new file mode 100644
index 00000000..e896aa41
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/objects.test
@@ -0,0 +1,26 @@
+--TEST--
+"autoescape" tag applies escaping to object method calls
+--TEMPLATE--
+{% autoescape 'html' %}
+{{ user.name }}
+{{ user.name|lower }}
+{{ user }}
+{% endautoescape %}
+--DATA--
+class UserForAutoEscapeTest
+{
+  public function getName()
+  {
+    return 'Fabien<br />';
+  }
+
+  public function __toString()
+  {
+     return 'Fabien<br />';
+  }
+}
+return array('user' => new UserForAutoEscapeTest())
+--EXPECT--
+Fabien&lt;br /&gt;
+fabien&lt;br /&gt;
+Fabien&lt;br /&gt;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/raw.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/raw.test
new file mode 100644
index 00000000..9f1cedd3
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/raw.test
@@ -0,0 +1,10 @@
+--TEST--
+"autoescape" tag does not escape when raw is used as a filter
+--TEMPLATE--
+{% autoescape 'html' %}
+{{ var|raw }}
+{% endautoescape %}
+--DATA--
+return array('var' => '<br />')
+--EXPECT--
+<br />
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/strategy.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/strategy.test
new file mode 100644
index 00000000..cf8cceef
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/strategy.test
@@ -0,0 +1,17 @@
+--TEST--
+"autoescape" tag accepts an escaping strategy
+--TEMPLATE--
+{% autoescape true js %}{{ var }}{% endautoescape %}
+
+{% autoescape true html %}{{ var }}{% endautoescape %}
+
+{% autoescape 'js' %}{{ var }}{% endautoescape %}
+
+{% autoescape 'html' %}{{ var }}{% endautoescape %}
+--DATA--
+return array('var' => '<br />"')
+--EXPECT--
+\x3Cbr\x20\x2F\x3E\x22
+&lt;br /&gt;&quot;
+\x3Cbr\x20\x2F\x3E\x22
+&lt;br /&gt;&quot;
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/type.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/type.test
new file mode 100644
index 00000000..4f415201
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/type.test
@@ -0,0 +1,69 @@
+--TEST--
+escape types
+--TEMPLATE--
+
+1. autoescape 'html' |escape('js')
+
+{% autoescape 'html' %}
+<a onclick="alert(&quot;{{ msg|escape('js') }}&quot;)"></a>
+{% endautoescape %}
+
+2. autoescape 'html' |escape('js')
+
+{% autoescape 'html' %}
+<a onclick="alert(&quot;{{ msg|escape('js') }}&quot;)"></a>
+{% endautoescape %}
+
+3. autoescape 'js' |escape('js')
+
+{% autoescape 'js' %}
+<a onclick="alert(&quot;{{ msg|escape('js') }}&quot;)"></a>
+{% endautoescape %}
+
+4. no escape
+
+{% autoescape false %}
+<a onclick="alert(&quot;{{ msg }}&quot;)"></a>
+{% endautoescape %}
+
+5. |escape('js')|escape('html')
+
+{% autoescape false %}
+<a onclick="alert(&quot;{{ msg|escape('js')|escape('html') }}&quot;)"></a>
+{% endautoescape %}
+
+6. autoescape 'html' |escape('js')|escape('html')
+
+{% autoescape 'html' %}
+<a onclick="alert(&quot;{{ msg|escape('js')|escape('html') }}&quot;)"></a>
+{% endautoescape %}
+
+--DATA--
+return array('msg' => "<>\n'\"")
+--EXPECT--
+
+1. autoescape 'html' |escape('js')
+
+<a onclick="alert(&quot;\x3C\x3E\x0A\x27\x22&quot;)"></a>
+
+2. autoescape 'html' |escape('js')
+
+<a onclick="alert(&quot;\x3C\x3E\x0A\x27\x22&quot;)"></a>
+
+3. autoescape 'js' |escape('js')
+
+<a onclick="alert(&quot;\x3C\x3E\x0A\x27\x22&quot;)"></a>
+
+4. no escape
+
+<a onclick="alert(&quot;<>
+'"&quot;)"></a>
+
+5. |escape('js')|escape('html')
+
+<a onclick="alert(&quot;\x3C\x3E\x0A\x27\x22&quot;)"></a>
+
+6. autoescape 'html' |escape('js')|escape('html')
+
+<a onclick="alert(&quot;\x3C\x3E\x0A\x27\x22&quot;)"></a>
+
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_filters.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_filters.test
new file mode 100644
index 00000000..7821a9aa
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_filters.test
@@ -0,0 +1,131 @@
+--TEST--
+"autoescape" tag applies escaping after calling filters
+--TEMPLATE--
+{% autoescape 'html' %}
+
+(escape_and_nl2br is an escaper filter)
+
+1. Don't escape escaper filter output
+( var is escaped by |escape_and_nl2br, line-breaks are added, 
+  the output is not escaped )
+{{ var|escape_and_nl2br }}
+
+2. Don't escape escaper filter output
+( var is escaped by |escape_and_nl2br, line-breaks are added, 
+  the output is not escaped, |raw is redundant )
+{{ var|escape_and_nl2br|raw }}
+
+3. Explicit escape
+( var is escaped by |escape_and_nl2br, line-breaks are added,
+  the output is explicitly escaped by |escape )
+{{ var|escape_and_nl2br|escape }}
+
+4. Escape non-escaper filter output
+( var is upper-cased by |upper,
+  the output is auto-escaped )
+{{ var|upper }}
+
+5. Escape if last filter is not an escaper
+( var is escaped by |escape_and_nl2br, line-breaks are added,
+  the output is upper-cased by |upper,
+  the output is auto-escaped as |upper is not an escaper )
+{{ var|escape_and_nl2br|upper }}
+
+6. Don't escape escaper filter output
+( var is upper cased by upper,
+  the output is escaped by |escape_and_nl2br, line-breaks are added,
+  the output is not escaped as |escape_and_nl2br is an escaper )
+{{ var|upper|escape_and_nl2br }}
+
+7. Escape if last filter is not an escaper
+( the output of |format is "<b>" ~ var ~ "</b>",
+  the output is auto-escaped )
+{{ "<b>%s</b>"|format(var) }}
+
+8. Escape if last filter is not an escaper
+( the output of |format is "<b>" ~ var ~ "</b>",
+  |raw is redundant,
+  the output is auto-escaped )
+{{ "<b>%s</b>"|raw|format(var) }}
+
+9. Don't escape escaper filter output
+( the output of |format is "<b>" ~ var ~ "</b>",
+  the output is not escaped due to |raw filter at the end )
+{{ "<b>%s</b>"|format(var)|raw }}
+
+10. Don't escape escaper filter output
+( the output of |format is "<b>" ~ var ~ "</b>",
+  the output is not escaped due to |raw filter at the end,
+  the |raw filter on var is redundant )
+{{ "<b>%s</b>"|format(var|raw)|raw }}
+
+{% endautoescape %}
+--DATA--
+return array('var' => "<Fabien>\nTwig")
+--EXPECT--
+
+(escape_and_nl2br is an escaper filter)
+
+1. Don't escape escaper filter output
+( var is escaped by |escape_and_nl2br, line-breaks are added, 
+  the output is not escaped )
+&lt;Fabien&gt;<br />
+Twig
+
+2. Don't escape escaper filter output
+( var is escaped by |escape_and_nl2br, line-breaks are added, 
+  the output is not escaped, |raw is redundant )
+&lt;Fabien&gt;<br />
+Twig
+
+3. Explicit escape
+( var is escaped by |escape_and_nl2br, line-breaks are added,
+  the output is explicitly escaped by |escape )
+&amp;lt;Fabien&amp;gt;&lt;br /&gt;
+Twig
+
+4. Escape non-escaper filter output
+( var is upper-cased by |upper,
+  the output is auto-escaped )
+&lt;FABIEN&gt;
+TWIG
+
+5. Escape if last filter is not an escaper
+( var is escaped by |escape_and_nl2br, line-breaks are added,
+  the output is upper-cased by |upper,
+  the output is auto-escaped as |upper is not an escaper )
+&amp;LT;FABIEN&amp;GT;&lt;BR /&gt;
+TWIG
+
+6. Don't escape escaper filter output
+( var is upper cased by upper,
+  the output is escaped by |escape_and_nl2br, line-breaks are added,
+  the output is not escaped as |escape_and_nl2br is an escaper )
+&lt;FABIEN&gt;<br />
+TWIG
+
+7. Escape if last filter is not an escaper
+( the output of |format is "<b>" ~ var ~ "</b>",
+  the output is auto-escaped )
+&lt;b&gt;&lt;Fabien&gt;
+Twig&lt;/b&gt;
+
+8. Escape if last filter is not an escaper
+( the output of |format is "<b>" ~ var ~ "</b>",
+  |raw is redundant,
+  the output is auto-escaped )
+&lt;b&gt;&lt;Fabien&gt;
+Twig&lt;/b&gt;
+
+9. Don't escape escaper filter output
+( the output of |format is "<b>" ~ var ~ "</b>",
+  the output is not escaped due to |raw filter at the end )
+<b><Fabien>
+Twig</b>
+
+10. Don't escape escaper filter output
+( the output of |format is "<b>" ~ var ~ "</b>",
+  the output is not escaped due to |raw filter at the end,
+  the |raw filter on var is redundant )
+<b><Fabien>
+Twig</b>
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_filters_arguments.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_filters_arguments.test
new file mode 100644
index 00000000..f58a1e09
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_filters_arguments.test
@@ -0,0 +1,23 @@
+--TEST--
+"autoescape" tag do not applies escaping on filter arguments
+--TEMPLATE--
+{% autoescape 'html' %}
+{{ var|nl2br("<br />") }}
+{{ var|nl2br("<br />"|escape) }}
+{{ var|nl2br(sep) }}
+{{ var|nl2br(sep|raw) }}
+{{ var|nl2br(sep|escape) }}
+{% endautoescape %}
+--DATA--
+return array('var' => "<Fabien>\nTwig", 'sep' => '<br />')
+--EXPECT--
+&lt;Fabien&gt;<br />
+Twig
+&lt;Fabien&gt;&lt;br /&gt;
+Twig
+&lt;Fabien&gt;<br />
+Twig
+&lt;Fabien&gt;<br />
+Twig
+&lt;Fabien&gt;&lt;br /&gt;
+Twig
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_pre_escape_filters.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_pre_escape_filters.test
new file mode 100644
index 00000000..134c77ea
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_pre_escape_filters.test
@@ -0,0 +1,68 @@
+--TEST--
+"autoescape" tag applies escaping after calling filters, and before calling pre_escape filters
+--TEMPLATE--
+{% autoescape 'html' %}
+
+(nl2br is pre_escaped for "html" and declared safe for "html")
+
+1. Pre-escape and don't post-escape
+( var|escape|nl2br )
+{{ var|nl2br }}
+
+2. Don't double-pre-escape
+( var|escape|nl2br )
+{{ var|escape|nl2br }}
+
+3. Don't escape safe values
+( var|raw|nl2br )
+{{ var|raw|nl2br }}
+
+4. Don't escape safe values
+( var|escape|nl2br|nl2br )
+{{ var|nl2br|nl2br }}
+
+5. Re-escape values that are escaped for an other contexts
+( var|escape_something|escape|nl2br )
+{{ var|escape_something|nl2br }}
+
+6. Still escape when using filters not declared safe
+( var|escape|nl2br|upper|escape )
+{{ var|nl2br|upper }}
+
+{% endautoescape %}
+--DATA--
+return array('var' => "<Fabien>\nTwig")
+--EXPECT--
+
+(nl2br is pre_escaped for "html" and declared safe for "html")
+
+1. Pre-escape and don't post-escape
+( var|escape|nl2br )
+&lt;Fabien&gt;<br />
+Twig
+
+2. Don't double-pre-escape
+( var|escape|nl2br )
+&lt;Fabien&gt;<br />
+Twig
+
+3. Don't escape safe values
+( var|raw|nl2br )
+<Fabien><br />
+Twig
+
+4. Don't escape safe values
+( var|escape|nl2br|nl2br )
+&lt;Fabien&gt;<br /><br />
+Twig
+
+5. Re-escape values that are escaped for an other contexts
+( var|escape_something|escape|nl2br )
+&lt;FABIEN&gt;<br />
+TWIG
+
+6. Still escape when using filters not declared safe
+( var|escape|nl2br|upper|escape )
+&amp;LT;FABIEN&amp;GT;&lt;BR /&gt;
+TWIG
+
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_preserves_safety_filters.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_preserves_safety_filters.test
new file mode 100644
index 00000000..32d3943b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/autoescape/with_preserves_safety_filters.test
@@ -0,0 +1,50 @@
+--TEST--
+"autoescape" tag handles filters preserving the safety
+--TEMPLATE--
+{% autoescape 'html' %}
+
+(preserves_safety is preserving safety for "html")
+
+1. Unsafe values are still unsafe
+( var|preserves_safety|escape )
+{{ var|preserves_safety }}
+
+2. Safe values are still safe
+( var|escape|preserves_safety )
+{{ var|escape|preserves_safety }}
+
+3. Re-escape values that are escaped for an other contexts
+( var|escape_something|preserves_safety|escape )
+{{ var|escape_something|preserves_safety }}
+
+4. Still escape when using filters not declared safe
+( var|escape|preserves_safety|replace({'FABIEN': 'FABPOT'})|escape )
+{{ var|escape|preserves_safety|replace({'FABIEN': 'FABPOT'}) }}
+
+{% endautoescape %}
+--DATA--
+return array('var' => "<Fabien>\nTwig")
+--EXPECT--
+
+(preserves_safety is preserving safety for "html")
+
+1. Unsafe values are still unsafe
+( var|preserves_safety|escape )
+&lt;FABIEN&gt;
+TWIG
+
+2. Safe values are still safe
+( var|escape|preserves_safety )
+&LT;FABIEN&GT;
+TWIG
+
+3. Re-escape values that are escaped for an other contexts
+( var|escape_something|preserves_safety|escape )
+&lt;FABIEN&gt;
+TWIG
+
+4. Still escape when using filters not declared safe
+( var|escape|preserves_safety|replace({'FABIEN': 'FABPOT'})|escape )
+&amp;LT;FABPOT&amp;GT;
+TWIG
+
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/basic.test
new file mode 100644
index 00000000..360dcf03
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/basic.test
@@ -0,0 +1,11 @@
+--TEST--
+"block" tag
+--TEMPLATE--
+{% block title1 %}FOO{% endblock %}
+{% block title2 foo|lower %}
+--TEMPLATE(foo.twig)--
+{% block content %}{% endblock %}
+--DATA--
+return array('foo' => 'bar')
+--EXPECT--
+FOObar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/block_unique_name.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/block_unique_name.test
new file mode 100644
index 00000000..5c205c0a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/block_unique_name.test
@@ -0,0 +1,11 @@
+--TEST--
+"block" tag
+--TEMPLATE--
+{% block content %}
+    {% block content %}
+    {% endblock %}
+{% endblock %}
+--DATA--
+return array()
+--EXCEPTION--
+Twig_Error_Syntax: The block 'content' has already been defined line 2 in "index.twig" at line 3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/special_chars.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/special_chars.test
new file mode 100644
index 00000000..be17fedf
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/block/special_chars.test
@@ -0,0 +1,10 @@
+--TEST--
+"§" special chars in a block name
+--TEMPLATE--
+{% block § %}
+§
+{% endblock § %}
+--DATA--
+return array()
+--EXPECT--
+§
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/basic.test
new file mode 100644
index 00000000..f44296ea
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/basic.test
@@ -0,0 +1,35 @@
+--TEST--
+"embed" tag
+--TEMPLATE--
+FOO
+{% embed "foo.twig" %}
+    {% block c1 %}
+        {{ parent() }}
+        block1extended
+    {% endblock %}
+{% endembed %}
+
+BAR
+--TEMPLATE(foo.twig)--
+A
+{% block c1 %}
+    block1
+{% endblock %}
+B
+{% block c2 %}
+    block2
+{% endblock %}
+C
+--DATA--
+return array()
+--EXPECT--
+FOO
+
+A
+            block1
+
+        block1extended
+    B
+    block2
+C
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/error_line.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/error_line.test
new file mode 100644
index 00000000..71ab2e01
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/error_line.test
@@ -0,0 +1,16 @@
+--TEST--
+"embed" tag
+--TEMPLATE(index.twig)--
+FOO
+{% embed "foo.twig" %}
+    {% block c1 %}
+        {{ nothing }}
+    {% endblock %}
+{% endembed %}
+BAR
+--TEMPLATE(foo.twig)--
+{% block c1 %}{% endblock %}
+--DATA--
+return array()
+--EXCEPTION--
+Twig_Error_Runtime: Variable "nothing" does not exist in "index.twig" at line 5
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/multiple.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/multiple.test
new file mode 100644
index 00000000..da161e6d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/multiple.test
@@ -0,0 +1,50 @@
+--TEST--
+"embed" tag
+--TEMPLATE--
+FOO
+{% embed "foo.twig" %}
+    {% block c1 %}
+        {{ parent() }}
+        block1extended
+    {% endblock %}
+{% endembed %}
+
+{% embed "foo.twig" %}
+    {% block c1 %}
+        {{ parent() }}
+        block1extended
+    {% endblock %}
+{% endembed %}
+
+BAR
+--TEMPLATE(foo.twig)--
+A
+{% block c1 %}
+    block1
+{% endblock %}
+B
+{% block c2 %}
+    block2
+{% endblock %}
+C
+--DATA--
+return array()
+--EXPECT--
+FOO
+
+A
+            block1
+
+        block1extended
+    B
+    block2
+C
+
+A
+            block1
+
+        block1extended
+    B
+    block2
+C
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/nested.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/nested.test
new file mode 100644
index 00000000..81563dce
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/nested.test
@@ -0,0 +1,42 @@
+--TEST--
+"embed" tag
+--TEMPLATE--
+{% embed "foo.twig" %}
+    {% block c1 %}
+        {{ parent() }}
+        {% embed "foo.twig" %}
+            {% block c1 %}
+                {{ parent() }}
+                block1extended
+            {% endblock %}
+        {% endembed %}
+
+    {% endblock %}
+{% endembed %}
+--TEMPLATE(foo.twig)--
+A
+{% block c1 %}
+    block1
+{% endblock %}
+B
+{% block c2 %}
+    block2
+{% endblock %}
+C
+--DATA--
+return array()
+--EXPECT--
+A
+            block1
+
+        
+A
+                    block1
+
+                block1extended
+            B
+    block2
+C
+    B
+    block2
+C
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/with_extends.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/with_extends.test
new file mode 100644
index 00000000..cf7953d3
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/embed/with_extends.test
@@ -0,0 +1,57 @@
+--TEST--
+"embed" tag
+--TEMPLATE--
+{% extends "base.twig" %}
+
+{% block c1 %}
+    {{ parent() }}
+    blockc1baseextended
+{% endblock %}
+
+{% block c2 %}
+    {{ parent() }}
+
+    {% embed "foo.twig" %}
+        {% block c1 %}
+            {{ parent() }}
+            block1extended
+        {% endblock %}
+    {% endembed %}
+{% endblock %}
+--TEMPLATE(base.twig)--
+A
+{% block c1 %}
+    blockc1base
+{% endblock %}
+{% block c2 %}
+    blockc2base
+{% endblock %}
+B
+--TEMPLATE(foo.twig)--
+A
+{% block c1 %}
+    block1
+{% endblock %}
+B
+{% block c2 %}
+    block2
+{% endblock %}
+C
+--DATA--
+return array()
+--EXPECT--
+A
+        blockc1base
+
+    blockc1baseextended
+        blockc2base
+
+
+    
+A
+                block1
+
+            block1extended
+        B
+    block2
+CB
\ No newline at end of file
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/basic.test
new file mode 100644
index 00000000..82094f2f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/basic.test
@@ -0,0 +1,10 @@
+--TEST--
+"filter" tag applies a filter on its children
+--TEMPLATE--
+{% filter upper %}
+Some text with a {{ var }}
+{% endfilter %}
+--DATA--
+return array('var' => 'var')
+--EXPECT--
+SOME TEXT WITH A VAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/json_encode.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/json_encode.test
new file mode 100644
index 00000000..3e7148bf
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/json_encode.test
@@ -0,0 +1,8 @@
+--TEST--
+"filter" tag applies a filter on its children
+--TEMPLATE--
+{% filter json_encode|raw %}test{% endfilter %}
+--DATA--
+return array()
+--EXPECT--
+"test"
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/multiple.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/multiple.test
new file mode 100644
index 00000000..75512ef9
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/multiple.test
@@ -0,0 +1,10 @@
+--TEST--
+"filter" tags accept multiple chained filters
+--TEMPLATE--
+{% filter lower|title %}
+  {{ var }}
+{% endfilter %}
+--DATA--
+return array('var' => 'VAR')
+--EXPECT--
+    Var
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/nested.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/nested.test
new file mode 100644
index 00000000..7e4e4eb3
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/nested.test
@@ -0,0 +1,16 @@
+--TEST--
+"filter" tags can be nested at will
+--TEMPLATE--
+{% filter lower|title %}
+  {{ var }}
+  {% filter upper %}
+    {{ var }}
+  {% endfilter %}
+  {{ var }}
+{% endfilter %}
+--DATA--
+return array('var' => 'var')
+--EXPECT--
+  Var
+      Var
+    Var
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/with_for_tag.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/with_for_tag.test
new file mode 100644
index 00000000..22745ead
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/with_for_tag.test
@@ -0,0 +1,13 @@
+--TEST--
+"filter" tag applies the filter on "for" tags
+--TEMPLATE--
+{% filter upper %}
+{% for item in items %}
+{{ item }}
+{% endfor %}
+{% endfilter %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+A
+B
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/with_if_tag.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/with_if_tag.test
new file mode 100644
index 00000000..afd95b29
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/filter/with_if_tag.test
@@ -0,0 +1,29 @@
+--TEST--
+"filter" tag applies the filter on "if" tags
+--TEMPLATE--
+{% filter upper %}
+{% if items %}
+{{ items|join(', ') }}
+{% endif %}
+
+{% if items.3 is defined %}
+FOO
+{% else %}
+{{ items.1 }}
+{% endif %}
+
+{% if items.3 is defined %}
+FOO
+{% elseif items.1 %}
+{{ items.0 }}
+{% endif %}
+
+{% endfilter %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+A, B
+
+B
+
+A
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/condition.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/condition.test
new file mode 100644
index 00000000..380531f7
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/condition.test
@@ -0,0 +1,14 @@
+--TEST--
+"for" tag takes a condition
+--TEMPLATE--
+{% for i in 1..5 if i is odd -%}
+    {{ loop.index }}.{{ i }}{{ foo.bar }}
+{% endfor %}
+--DATA--
+return array('foo' => array('bar' => 'X'))
+--CONFIG--
+return array('strict_variables' => false)
+--EXPECT--
+1.1X
+2.3X
+3.5X
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/context.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/context.test
new file mode 100644
index 00000000..ddc69307
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/context.test
@@ -0,0 +1,18 @@
+--TEST--
+"for" tag keeps the context safe
+--TEMPLATE--
+{% for item in items %}
+  {% for item in items %}
+    * {{ item }}
+  {% endfor %}
+  * {{ item }}
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+      * a
+      * b
+    * a
+      * a
+      * b
+    * b
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/else.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/else.test
new file mode 100644
index 00000000..20ccc880
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/else.test
@@ -0,0 +1,23 @@
+--TEST--
+"for" tag can use an "else" clause
+--TEMPLATE--
+{% for item in items %}
+  * {{ item }}
+{% else %}
+  no item
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+  * a
+  * b
+--DATA--
+return array('items' => array())
+--EXPECT--
+  no item
+--DATA--
+return array()
+--CONFIG--
+return array('strict_variables' => false)
+--EXPECT--
+  no item
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/inner_variables.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/inner_variables.test
new file mode 100644
index 00000000..49fb9ca6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/inner_variables.test
@@ -0,0 +1,17 @@
+--TEST--
+"for" tag does not reset inner variables
+--TEMPLATE--
+{% for i in 1..2 %}
+  {% for j in 0..2 %}
+    {{k}}{% set k = k+1 %} {{ loop.parent.loop.index }}
+  {% endfor %}
+{% endfor %}
+--DATA--
+return array('k' => 0)
+--EXPECT--
+      0 1
+      1 1
+      2 1
+        3 2
+      4 2
+      5 2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/keys.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/keys.test
new file mode 100644
index 00000000..4e22cb47
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/keys.test
@@ -0,0 +1,11 @@
+--TEST--
+"for" tag can iterate over keys
+--TEMPLATE--
+{% for key in items|keys %}
+  * {{ key }}
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+  * 0
+  * 1
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/keys_and_values.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/keys_and_values.test
new file mode 100644
index 00000000..4c211689
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/keys_and_values.test
@@ -0,0 +1,11 @@
+--TEST--
+"for" tag can iterate over keys and values
+--TEMPLATE--
+{% for key, item in items %}
+  * {{ key }}/{{ item }}
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+  * 0/a
+  * 1/b
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_context.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_context.test
new file mode 100644
index 00000000..93bc76a1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_context.test
@@ -0,0 +1,19 @@
+--TEST--
+"for" tag adds a loop variable to the context
+--TEMPLATE--
+{% for item in items %}
+  * {{ loop.index }}/{{ loop.index0 }}
+  * {{ loop.revindex }}/{{ loop.revindex0 }}
+  * {{ loop.first }}/{{ loop.last }}/{{ loop.length }}
+
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+  * 1/0
+  * 2/1
+  * 1//2
+
+  * 2/1
+  * 1/0
+  * /1/2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_context_local.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_context_local.test
new file mode 100644
index 00000000..58af2c32
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_context_local.test
@@ -0,0 +1,10 @@
+--TEST--
+"for" tag adds a loop variable to the context locally
+--TEMPLATE--
+{% for item in items %}
+{% endfor %}
+{% if loop is not defined %}WORKS{% endif %}
+--DATA--
+return array('items' => array())
+--EXPECT--
+WORKS
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_not_defined.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_not_defined.test
new file mode 100644
index 00000000..4301ef2f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_not_defined.test
@@ -0,0 +1,10 @@
+--TEST--
+"for" tag
+--TEMPLATE--
+{% for i, item in items if i > 0 %}
+    {{ loop.last }}
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXCEPTION--
+Twig_Error_Syntax: The "loop.last" variable is not defined when looping with a condition in "index.twig" at line 3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_not_defined_cond.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_not_defined_cond.test
new file mode 100644
index 00000000..c7e723a5
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/loop_not_defined_cond.test
@@ -0,0 +1,9 @@
+--TEST--
+"for" tag
+--TEMPLATE--
+{% for i, item in items if loop.last > 0 %}
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXCEPTION--
+Twig_Error_Syntax: The "loop" variable cannot be used in a looping condition in "index.twig" at line 2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/nested_else.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/nested_else.test
new file mode 100644
index 00000000..f8b9f6bc
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/nested_else.test
@@ -0,0 +1,17 @@
+--TEST--
+"for" tag can use an "else" clause
+--TEMPLATE--
+{% for item in items %}
+  {% for item in items1 %}
+    * {{ item }}
+  {% else %}
+    no {{ item }}
+  {% endfor %}
+{% else %}
+  no item1
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'), 'items1' => array())
+--EXPECT--
+no a
+        no b
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/objects.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/objects.test
new file mode 100644
index 00000000..50344379
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/objects.test
@@ -0,0 +1,43 @@
+--TEST--
+"for" tag iterates over iterable objects
+--TEMPLATE--
+{% for item in items %}
+  * {{ item }}
+  * {{ loop.index }}/{{ loop.index0 }}
+  * {{ loop.first }}
+
+{% endfor %}
+
+{% for key, value in items %}
+  * {{ key }}/{{ value }}
+{% endfor %}
+
+{% for key in items|keys %}
+  * {{ key }}
+{% endfor %}
+--DATA--
+class ItemsIterator implements Iterator
+{
+  protected $values = array('foo' => 'bar', 'bar' => 'foo');
+  public function current() { return current($this->values); }
+  public function key() { return key($this->values); }
+  public function next() { return next($this->values); }
+  public function rewind() { return reset($this->values); }
+  public function valid() { return false !== current($this->values); }
+}
+return array('items' => new ItemsIterator())
+--EXPECT--
+  * bar
+  * 1/0
+  * 1
+
+  * foo
+  * 2/1
+  * 
+
+
+  * foo/bar
+  * bar/foo
+
+  * foo
+  * bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/objects_countable.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/objects_countable.test
new file mode 100644
index 00000000..4a1ff611
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/objects_countable.test
@@ -0,0 +1,47 @@
+--TEST--
+"for" tag iterates over iterable and countable objects
+--TEMPLATE--
+{% for item in items %}
+  * {{ item }}
+  * {{ loop.index }}/{{ loop.index0 }}
+  * {{ loop.revindex }}/{{ loop.revindex0 }}
+  * {{ loop.first }}/{{ loop.last }}/{{ loop.length }}
+
+{% endfor %}
+
+{% for key, value in items %}
+  * {{ key }}/{{ value }}
+{% endfor %}
+
+{% for key in items|keys %}
+  * {{ key }}
+{% endfor %}
+--DATA--
+class ItemsIteratorCountable implements Iterator, Countable
+{
+  protected $values = array('foo' => 'bar', 'bar' => 'foo');
+  public function current() { return current($this->values); }
+  public function key() { return key($this->values); }
+  public function next() { return next($this->values); }
+  public function rewind() { return reset($this->values); }
+  public function valid() { return false !== current($this->values); }
+  public function count() { return count($this->values); }
+}
+return array('items' => new ItemsIteratorCountable())
+--EXPECT--
+  * bar
+  * 1/0
+  * 2/1
+  * 1//2
+
+  * foo
+  * 2/1
+  * 1/0
+  * /1/2
+
+
+  * foo/bar
+  * bar/foo
+
+  * foo
+  * bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/recursive.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/recursive.test
new file mode 100644
index 00000000..17b2e222
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/recursive.test
@@ -0,0 +1,18 @@
+--TEST--
+"for" tags can be nested
+--TEMPLATE--
+{% for key, item in items %}
+* {{ key }} ({{ loop.length }}):
+{% for value in item %}
+  * {{ value }} ({{ loop.length }})
+{% endfor %}
+{% endfor %}
+--DATA--
+return array('items' => array('a' => array('a1', 'a2', 'a3'), 'b' => array('b1')))
+--EXPECT--
+* a (2):
+  * a1 (3)
+  * a2 (3)
+  * a3 (3)
+* b (2):
+  * b1 (1)
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/values.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/values.test
new file mode 100644
index 00000000..82f2ae8a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/for/values.test
@@ -0,0 +1,11 @@
+--TEST--
+"for" tag iterates over item values
+--TEMPLATE--
+{% for item in items %}
+  * {{ item }}
+{% endfor %}
+--DATA--
+return array('items' => array('a', 'b'))
+--EXPECT--
+  * a
+  * b
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/from.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/from.test
new file mode 100644
index 00000000..5f5da0ec
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/from.test
@@ -0,0 +1,14 @@
+--TEST--
+global variables
+--TEMPLATE--
+{% include "included.twig" %}
+{% from "included.twig" import foobar %}
+{{ foobar() }}
+--TEMPLATE(included.twig)--
+{% macro foobar() %}
+called foobar
+{% endmacro %}
+--DATA--
+return array();
+--EXPECT--
+called foobar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/if/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/if/basic.test
new file mode 100644
index 00000000..c1c3d276
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/if/basic.test
@@ -0,0 +1,22 @@
+--TEST--
+"if" creates a condition
+--TEMPLATE--
+{% if a is defined %}
+  {{ a }}
+{% elseif b is defined %}
+  {{ b }}
+{% else %}
+  NOTHING
+{% endif %}
+--DATA--
+return array('a' => 'a')
+--EXPECT--
+  a
+--DATA--
+return array('b' => 'b')
+--EXPECT--
+  b
+--DATA--
+return array()
+--EXPECT--
+  NOTHING
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/if/expression.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/if/expression.test
new file mode 100644
index 00000000..edfb73df
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/if/expression.test
@@ -0,0 +1,22 @@
+--TEST--
+"if" takes an expression as a test
+--TEMPLATE--
+{% if a < 2 %}
+  A1
+{% elseif a > 10 %}
+  A2
+{% else %}
+  A3
+{% endif %}
+--DATA--
+return array('a' => 1)
+--EXPECT--
+  A1
+--DATA--
+return array('a' => 12)
+--EXPECT--
+  A2
+--DATA--
+return array('a' => 7)
+--EXPECT--
+  A3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/basic.test
new file mode 100644
index 00000000..8fe1a6c1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/basic.test
@@ -0,0 +1,16 @@
+--TEST--
+"include" tag
+--TEMPLATE--
+FOO
+{% include "foo.twig" %}
+
+BAR
+--TEMPLATE(foo.twig)--
+FOOBAR
+--DATA--
+return array()
+--EXPECT--
+FOO
+
+FOOBAR
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/expression.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/expression.test
new file mode 100644
index 00000000..eaeeb112
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/expression.test
@@ -0,0 +1,16 @@
+--TEST--
+"include" tag allows expressions for the template to include
+--TEMPLATE--
+FOO
+{% include foo %}
+
+BAR
+--TEMPLATE(foo.twig)--
+FOOBAR
+--DATA--
+return array('foo' => 'foo.twig')
+--EXPECT--
+FOO
+
+FOOBAR
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/ignore_missing.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/ignore_missing.test
new file mode 100644
index 00000000..24aed06d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/ignore_missing.test
@@ -0,0 +1,10 @@
+--TEST--
+"include" tag
+--TEMPLATE--
+{% include ["foo.twig", "bar.twig"] ignore missing %}
+{% include "foo.twig" ignore missing %}
+{% include "foo.twig" ignore missing with {} %}
+{% include "foo.twig" ignore missing with {} only %}
+--DATA--
+return array()
+--EXPECT--
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/missing.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/missing.test
new file mode 100644
index 00000000..f25e8715
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/missing.test
@@ -0,0 +1,8 @@
+--TEST--
+"include" tag
+--TEMPLATE--
+{% include "foo.twig" %}
+--DATA--
+return array();
+--EXCEPTION--
+Twig_Error_Loader: Template "foo.twig" is not defined in "index.twig" at line 2.
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/missing_nested.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/missing_nested.test
new file mode 100644
index 00000000..86c18644
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/missing_nested.test
@@ -0,0 +1,16 @@
+--TEST--
+"include" tag
+--TEMPLATE--
+{% extends "base.twig" %}
+
+{% block content %}
+    {{ parent() }}
+{% endblock %}
+--TEMPLATE(base.twig)--
+{% block content %}
+    {% include "foo.twig" %}
+{% endblock %}
+--DATA--
+return array();
+--EXCEPTION--
+Twig_Error_Loader: Template "foo.twig" is not defined in "base.twig" at line 3.
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/only.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/only.test
new file mode 100644
index 00000000..77760a09
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/only.test
@@ -0,0 +1,16 @@
+--TEST--
+"include" tag accept variables and only
+--TEMPLATE--
+{% include "foo.twig" %}
+{% include "foo.twig" only %}
+{% include "foo.twig" with {'foo1': 'bar'} %}
+{% include "foo.twig" with {'foo1': 'bar'} only %}
+--TEMPLATE(foo.twig)--
+{% for k, v in _context %}{{ k }},{% endfor %}
+--DATA--
+return array('foo' => 'bar')
+--EXPECT--
+foo,global,_parent,
+global,_parent,
+foo,global,foo1,_parent,
+foo1,global,_parent,
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/template_instance.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/template_instance.test
new file mode 100644
index 00000000..6ba064a3
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/template_instance.test
@@ -0,0 +1,10 @@
+--TEST--
+"include" tag accepts Twig_Template instance
+--TEMPLATE--
+{% include foo %} FOO
+--TEMPLATE(foo.twig)--
+BAR
+--DATA--
+return array('foo' => $twig->loadTemplate('foo.twig'))
+--EXPECT--
+BAR FOO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/templates_as_array.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/templates_as_array.test
new file mode 100644
index 00000000..ab670ee0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/templates_as_array.test
@@ -0,0 +1,12 @@
+--TEST--
+"include" tag
+--TEMPLATE--
+{% include ["foo.twig", "bar.twig"] %}
+{% include ["bar.twig", "foo.twig"] %}
+--TEMPLATE(foo.twig)--
+foo
+--DATA--
+return array()
+--EXPECT--
+foo
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/with_variables.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/with_variables.test
new file mode 100644
index 00000000..41384ac7
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/include/with_variables.test
@@ -0,0 +1,12 @@
+--TEST--
+"include" tag accept variables
+--TEMPLATE--
+{% include "foo.twig" with {'foo': 'bar'} %}
+{% include "foo.twig" with vars %}
+--TEMPLATE(foo.twig)--
+{{ foo }}
+--DATA--
+return array('vars' => array('foo' => 'bar'))
+--EXPECT--
+bar
+bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/basic.test
new file mode 100644
index 00000000..0778a4b4
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/basic.test
@@ -0,0 +1,14 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends "foo.twig" %}
+
+{% block content %}
+FOO
+{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+FOO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/conditional.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/conditional.test
new file mode 100644
index 00000000..8576e773
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/conditional.test
@@ -0,0 +1,14 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends standalone ? foo : 'bar.twig' %}
+
+{% block content %}{{ parent() }}FOO{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}FOO{% endblock %}
+--TEMPLATE(bar.twig)--
+{% block content %}BAR{% endblock %}
+--DATA--
+return array('foo' => 'foo.twig', 'standalone' => true)
+--EXPECT--
+FOOFOO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/dynamic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/dynamic.test
new file mode 100644
index 00000000..ee06ddce
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/dynamic.test
@@ -0,0 +1,14 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends foo %}
+
+{% block content %}
+FOO
+{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}{% endblock %}
+--DATA--
+return array('foo' => 'foo.twig')
+--EXPECT--
+FOO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/empty.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/empty.test
new file mode 100644
index 00000000..784f3571
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/empty.test
@@ -0,0 +1,10 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends "foo.twig" %}
+--TEMPLATE(foo.twig)--
+{% block content %}FOO{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+FOO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/extends_as_array.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/extends_as_array.test
new file mode 100644
index 00000000..a1cb1ce8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/extends_as_array.test
@@ -0,0 +1,12 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends ["foo.twig", "bar.twig"] %}
+--TEMPLATE(bar.twig)--
+{% block content %}
+foo
+{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/multiple.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/multiple.test
new file mode 100644
index 00000000..dfc2b6c4
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/multiple.test
@@ -0,0 +1,12 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends "layout.twig" %}{% block content %}{{ parent() }}index {% endblock %}
+--TEMPLATE(layout.twig)--
+{% extends "base.twig" %}{% block content %}{{ parent() }}layout {% endblock %}
+--TEMPLATE(base.twig)--
+{% block content %}base {% endblock %}
+--DATA--
+return array()
+--EXPECT--
+base layout index
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_blocks.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_blocks.test
new file mode 100644
index 00000000..faca9259
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_blocks.test
@@ -0,0 +1,22 @@
+--TEST--
+"block" tag
+--TEMPLATE--
+{% extends "foo.twig" %}
+
+{% block content %}
+    {% block subcontent %}
+        {% block subsubcontent %}
+            SUBSUBCONTENT
+        {% endblock %}
+    {% endblock %}
+{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}
+    {% block subcontent %}
+        SUBCONTENT
+    {% endblock %}
+{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+SUBSUBCONTENT
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_blocks_parent_only.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_blocks_parent_only.test
new file mode 100644
index 00000000..0ad11d0c
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_blocks_parent_only.test
@@ -0,0 +1,15 @@
+--TEST--
+"block" tag
+--TEMPLATE--
+{% block content %}
+    CONTENT
+    {%- block subcontent -%}
+        SUBCONTENT
+    {%- endblock -%}
+    ENDCONTENT
+{% endblock %}
+--TEMPLATE(foo.twig)--
+--DATA--
+return array()
+--EXPECT--
+CONTENTSUBCONTENTENDCONTENT
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_inheritance.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_inheritance.test
new file mode 100644
index 00000000..71e3cdfd
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/nested_inheritance.test
@@ -0,0 +1,16 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends "layout.twig" %}
+{% block inside %}INSIDE{% endblock inside %}
+--TEMPLATE(layout.twig)--
+{% extends "base.twig" %}
+{% block body %}
+    {% block inside '' %}
+{% endblock body %}
+--TEMPLATE(base.twig)--
+{% block body '' %}
+--DATA--
+return array()
+--EXPECT--
+INSIDE
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent.test
new file mode 100644
index 00000000..4f975db8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent.test
@@ -0,0 +1,12 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends "foo.twig" %}
+
+{% block content %}{{ parent() }}FOO{{ parent() }}{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}BAR{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+BARFOOBAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_change.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_change.test
new file mode 100644
index 00000000..a8bc90ce
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_change.test
@@ -0,0 +1,16 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends foo ? 'foo.twig' : 'bar.twig' %}
+--TEMPLATE(foo.twig)--
+FOO
+--TEMPLATE(bar.twig)--
+BAR
+--DATA--
+return array('foo' => true)
+--EXPECT--
+FOO
+--DATA--
+return array('foo' => false)
+--EXPECT--
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_in_a_block.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_in_a_block.test
new file mode 100644
index 00000000..c9e86b1a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_in_a_block.test
@@ -0,0 +1,8 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% block content %}
+    {% extends "foo.twig" %}
+{% endblock %}
+--EXCEPTION--
+Twig_Error_Syntax: Cannot extend from a block in "index.twig" at line 3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_isolation.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_isolation.test
new file mode 100644
index 00000000..62816713
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_isolation.test
@@ -0,0 +1,20 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends "base.twig" %}
+{% block content %}{% include "included.twig" %}{% endblock %}
+
+{% block footer %}Footer{% endblock %}
+--TEMPLATE(included.twig)--
+{% extends "base.twig" %}
+{% block content %}Included Content{% endblock %}
+--TEMPLATE(base.twig)--
+{% block content %}Default Content{% endblock %}
+
+{% block footer %}Default Footer{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+Included Content
+Default Footer
+Footer
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_nested.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_nested.test
new file mode 100644
index 00000000..71e7c208
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_nested.test
@@ -0,0 +1,28 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends "foo.twig" %}
+
+{% block content %}
+  {% block inside %}
+    INSIDE OVERRIDDEN
+  {% endblock %}
+
+  BEFORE
+  {{ parent() }}
+  AFTER
+{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}
+  BAR
+{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+
+INSIDE OVERRIDDEN
+  
+  BEFORE
+    BAR
+
+  AFTER
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_without_extends.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_without_extends.test
new file mode 100644
index 00000000..a9eaa4c1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_without_extends.test
@@ -0,0 +1,8 @@
+--TEST--
+"parent" tag
+--TEMPLATE--
+{% block content %}
+    {{ parent() }}
+{% endblock %}
+--EXCEPTION--
+Twig_Error_Syntax: Calling "parent" on a template that does not extend nor "use" another template is forbidden in "index.twig" at line 3
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_without_extends_but_traits.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_without_extends_but_traits.test
new file mode 100644
index 00000000..63c73055
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/parent_without_extends_but_traits.test
@@ -0,0 +1,14 @@
+--TEST--
+"parent" tag
+--TEMPLATE--
+{% use 'foo.twig' %}
+
+{% block content %}
+    {{ parent() }}
+{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}BAR{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+BAR
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/template_instance.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/template_instance.test
new file mode 100644
index 00000000..d1876a52
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/template_instance.test
@@ -0,0 +1,14 @@
+--TEST--
+"extends" tag accepts Twig_Template instance
+--TEMPLATE--
+{% extends foo %}
+
+{% block content %}
+{{ parent() }}FOO
+{% endblock %}
+--TEMPLATE(foo.twig)--
+{% block content %}BAR{% endblock %}
+--DATA--
+return array('foo' => $twig->loadTemplate('foo.twig'))
+--EXPECT--
+BARFOO
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/use.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/use.test
new file mode 100644
index 00000000..8f9ece7c
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/inheritance/use.test
@@ -0,0 +1,44 @@
+--TEST--
+"parent" function
+--TEMPLATE--
+{% extends "parent.twig" %}
+
+{% use "use1.twig" %}
+{% use "use2.twig" %}
+
+{% block content_parent %}
+    {{ parent() }}
+{% endblock %}
+
+{% block content_use1 %}
+    {{ parent() }}
+{% endblock %}
+
+{% block content_use2 %}
+    {{ parent() }}
+{% endblock %}
+
+{% block content %}
+    {{ block('content_use1_only') }}
+    {{ block('content_use2_only') }}
+{% endblock %}
+--TEMPLATE(parent.twig)--
+{% block content_parent 'content_parent' %}
+{% block content_use1 'content_parent' %}
+{% block content_use2 'content_parent' %}
+{% block content '' %}
+--TEMPLATE(use1.twig)--
+{% block content_use1 'content_use1' %}
+{% block content_use2 'content_use1' %}
+{% block content_use1_only 'content_use1_only' %}
+--TEMPLATE(use2.twig)--
+{% block content_use2 'content_use2' %}
+{% block content_use2_only 'content_use2_only' %}
+--DATA--
+return array()
+--EXPECT--
+    content_parent
+    content_use1
+    content_use2
+    content_use1_only
+    content_use2_only
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/basic.test
new file mode 100644
index 00000000..eef0c10d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/basic.test
@@ -0,0 +1,17 @@
+--TEST--
+"macro" tag
+--TEMPLATE--
+{% import _self as macros %}
+
+{{ macros.input('username') }}
+{{ macros.input('password', null, 'password', 1) }}
+
+{% macro input(name, value, type, size) %}
+  <input type="{{ type|default("text") }}" name="{{ name }}" value="{{ value|e|default('') }}" size="{{ size|default(20) }}">
+{% endmacro %}
+--DATA--
+return array()
+--EXPECT--
+  <input type="text" name="username" value="" size="20">
+
+  <input type="password" name="password" value="" size="1">
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/endmacro_name.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/endmacro_name.test
new file mode 100644
index 00000000..ae6203bb
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/endmacro_name.test
@@ -0,0 +1,16 @@
+--TEST--
+"macro" tag supports name for endmacro
+--TEMPLATE--
+{% import _self as macros %}
+
+{{ macros.foo() }}
+{{ macros.bar() }}
+
+{% macro foo() %}foo{% endmacro %}
+{% macro bar() %}bar{% endmacro bar %}
+--DATA--
+return array()
+--EXPECT--
+foo
+bar
+
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/external.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/external.test
new file mode 100644
index 00000000..5cd3dae6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/external.test
@@ -0,0 +1,17 @@
+--TEST--
+"macro" tag
+--TEMPLATE--
+{% import 'forms.twig' as forms %}
+
+{{ forms.input('username') }}
+{{ forms.input('password', null, 'password', 1) }}
+--TEMPLATE(forms.twig)--
+{% macro input(name, value, type, size) %}
+  <input type="{{ type|default("text") }}" name="{{ name }}" value="{{ value|e|default('') }}" size="{{ size|default(20) }}">
+{% endmacro %}
+--DATA--
+return array()
+--EXPECT--
+  <input type="text" name="username" value="" size="20">
+
+  <input type="password" name="password" value="" size="1">
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/from.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/from.test
new file mode 100644
index 00000000..205f5918
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/from.test
@@ -0,0 +1,18 @@
+--TEST--
+"macro" tag
+--TEMPLATE--
+{% from 'forms.twig' import foo %}
+{% from 'forms.twig' import foo as foobar, bar %}
+
+{{ foo('foo') }}
+{{ foobar('foo') }}
+{{ bar('foo') }}
+--TEMPLATE(forms.twig)--
+{% macro foo(name) %}foo{{ name }}{% endmacro %}
+{% macro bar(name) %}bar{{ name }}{% endmacro %}
+--DATA--
+return array()
+--EXPECT--
+foofoo
+foofoo
+barfoo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/global.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/global.test
new file mode 100644
index 00000000..6b371768
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/global.test
@@ -0,0 +1,14 @@
+--TEST--
+"macro" tag
+--TEMPLATE--
+{% from 'forms.twig' import foo %}
+
+{{ foo('foo') }}
+{{ foo() }}
+--TEMPLATE(forms.twig)--
+{% macro foo(name) %}{{ name|default('foo') }}{{ global }}{% endmacro %}
+--DATA--
+return array()
+--EXPECT--
+fooglobal
+fooglobal
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/self_import.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/self_import.test
new file mode 100644
index 00000000..17756cb6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/self_import.test
@@ -0,0 +1,17 @@
+--TEST--
+"macro" tag
+--TEMPLATE--
+{% import _self as forms %}
+
+{{ forms.input('username') }}
+{{ forms.input('password', null, 'password', 1) }}
+
+{% macro input(name, value, type, size) %}
+  <input type="{{ type|default("text") }}" name="{{ name }}" value="{{ value|e|default('') }}" size="{{ size|default(20) }}">
+{% endmacro %}
+--DATA--
+return array()
+--EXPECT--
+  <input type="text" name="username" value="" size="20">
+
+  <input type="password" name="password" value="" size="1">
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/special_chars.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/special_chars.test
new file mode 100644
index 00000000..37217707
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/macro/special_chars.test
@@ -0,0 +1,14 @@
+--TEST--
+"§" as a macro name
+--TEMPLATE--
+{% import _self as macros %}
+
+{{ macros.§('foo') }}
+
+{% macro §(foo) %}
+  §{{ foo }}§
+{% endmacro %}
+--DATA--
+return array()
+--EXPECT--
+§foo§
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/basic.test
new file mode 100644
index 00000000..0445e853
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/basic.test
@@ -0,0 +1,10 @@
+--TEST--
+"raw" tag
+--TEMPLATE--
+{% raw %}
+{{ foo }}
+{% endraw %}
+--DATA--
+return array()
+--EXPECT--
+{{ foo }}
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/mixed_usage_with_raw.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/mixed_usage_with_raw.test
new file mode 100644
index 00000000..2fd9fb26
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/mixed_usage_with_raw.test
@@ -0,0 +1,10 @@
+--TEST--
+"raw" tag
+--TEMPLATE--
+{% raw %}
+{{ foo }}
+{% endverbatim %}
+--DATA--
+return array()
+--EXCEPTION--
+Twig_Error_Syntax: Unexpected end of file: Unclosed "raw" block in "index.twig" at line 2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/whitespace_control.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/whitespace_control.test
new file mode 100644
index 00000000..352bb187
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/raw/whitespace_control.test
@@ -0,0 +1,56 @@
+--TEST--
+"raw" tag
+--TEMPLATE--
+1***
+
+{%- raw %}
+    {{ 'bla' }}
+{% endraw %}
+
+1***
+2***
+
+{%- raw -%}
+    {{ 'bla' }}
+{% endraw %}
+
+2***
+3***
+
+{%- raw -%}
+    {{ 'bla' }}
+{% endraw -%}
+
+3***
+4***
+
+{%- raw -%}
+    {{ 'bla' }}
+{%- endraw %}
+
+4***
+5***
+
+{%- raw -%}
+    {{ 'bla' }}
+{%- endraw -%}
+
+5***
+--DATA--
+return array()
+--EXPECT--
+1***
+    {{ 'bla' }}
+
+
+1***
+2***{{ 'bla' }}
+
+
+2***
+3***{{ 'bla' }}
+3***
+4***{{ 'bla' }}
+
+4***
+5***{{ 'bla' }}5***
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/not_valid1.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/not_valid1.test
new file mode 100644
index 00000000..683c59a0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/not_valid1.test
@@ -0,0 +1,11 @@
+--TEST--
+sandbox tag
+--TEMPLATE--
+{%- sandbox %}
+    {%- include "foo.twig" %}
+    a
+{%- endsandbox %}
+--TEMPLATE(foo.twig)--
+foo
+--EXCEPTION--
+Twig_Error_Syntax: Only "include" tags are allowed within a "sandbox" section in "index.twig" at line 4
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/not_valid2.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/not_valid2.test
new file mode 100644
index 00000000..3dcfa88c
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/not_valid2.test
@@ -0,0 +1,14 @@
+--TEST--
+sandbox tag
+--TEMPLATE--
+{%- sandbox %}
+    {%- include "foo.twig" %}
+
+    {% if 1 %}
+        {%- include "foo.twig" %}
+    {% endif %}
+{%- endsandbox %}
+--TEMPLATE(foo.twig)--
+foo
+--EXCEPTION--
+Twig_Error_Syntax: Only "include" tags are allowed within a "sandbox" section in "index.twig" at line 5
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/simple.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/simple.test
new file mode 100644
index 00000000..de20f3db
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/sandbox/simple.test
@@ -0,0 +1,22 @@
+--TEST--
+sandbox tag
+--TEMPLATE--
+{%- sandbox %}
+    {%- include "foo.twig" %}
+{%- endsandbox %}
+
+{%- sandbox %}
+    {%- include "foo.twig" %}
+    {%- include "foo.twig" %}
+{%- endsandbox %}
+
+{%- sandbox %}{% include "foo.twig" %}{% endsandbox %}
+--TEMPLATE(foo.twig)--
+foo
+--DATA--
+return array()
+--EXPECT--
+foo
+foo
+foo
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/basic.test
new file mode 100644
index 00000000..a5a9f830
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/basic.test
@@ -0,0 +1,20 @@
+--TEST--
+"set" tag
+--TEMPLATE--
+{% set foo = 'foo' %}
+{% set bar = 'foo<br />' %}
+
+{{ foo }}
+{{ bar }}
+
+{% set foo, bar = 'foo', 'bar' %}
+
+{{ foo }}{{ bar }}
+--DATA--
+return array()
+--EXPECT--
+foo
+foo&lt;br /&gt;
+
+
+foobar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/capture-empty.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/capture-empty.test
new file mode 100644
index 00000000..ec657f00
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/capture-empty.test
@@ -0,0 +1,9 @@
+--TEST--
+"set" tag block empty capture
+--TEMPLATE--
+{% set foo %}{% endset %}
+
+{% if foo %}FAIL{% endif %}
+--DATA--
+return array()
+--EXPECT--
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/capture.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/capture.test
new file mode 100644
index 00000000..f156a1a7
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/capture.test
@@ -0,0 +1,10 @@
+--TEST--
+"set" tag block capture
+--TEMPLATE--
+{% set foo %}f<br />o<br />o{% endset %}
+
+{{ foo }}
+--DATA--
+return array()
+--EXPECT--
+f<br />o<br />o
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/expression.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/expression.test
new file mode 100644
index 00000000..8ff434a0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/set/expression.test
@@ -0,0 +1,12 @@
+--TEST--
+"set" tag
+--TEMPLATE--
+{% set foo, bar = 'foo' ~ 'bar', 'bar' ~ 'foo' %}
+
+{{ foo }}
+{{ bar }}
+--DATA--
+return array()
+--EXPECT--
+foobar
+barfoo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/spaceless/simple.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/spaceless/simple.test
new file mode 100644
index 00000000..dd06dec2
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/spaceless/simple.test
@@ -0,0 +1,12 @@
+--TEST--
+"spaceless" tag removes whites between HTML tags
+--TEMPLATE--
+{% spaceless %}
+
+    <div>   <div>   foo   </div>   </div>
+
+{% endspaceless %}
+--DATA--
+return array()
+--EXPECT--
+<div><div>   foo   </div></div>
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/special_chars.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/special_chars.test
new file mode 100644
index 00000000..789b4ba8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/special_chars.test
@@ -0,0 +1,8 @@
+--TEST--
+"§" custom tag
+--TEMPLATE--
+{% § %}
+--DATA--
+return array()
+--EXPECT--
+§
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/trim_block.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/trim_block.test
new file mode 100644
index 00000000..1d2273f8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/trim_block.test
@@ -0,0 +1,74 @@
+--TEST--
+Whitespace trimming on tags.
+--TEMPLATE--
+{{ 5 * '{#-'|length }}
+{{ '{{-'|length * 5 + '{%-'|length }}
+
+Trim on control tag:
+{% for i in range(1, 9) -%}
+        {{ i }}
+{%- endfor %}
+
+
+Trim on output tag:
+{% for i in range(1, 9) %}
+        {{- i -}}
+{% endfor %}
+
+
+Trim comments:
+      
+{#- Invisible -#}
+       
+After the comment.
+
+Trim leading space:
+{% if leading %}
+
+                {{- leading }}
+{% endif %}
+
+{%- if leading %}
+        {{- leading }}
+
+{%- endif %}
+
+
+Trim trailing space:
+{% if trailing -%}          
+        {{ trailing -}}
+
+{% endif -%}
+
+Combined:
+
+{%- if both -%}
+<ul>
+        <li>    {{- both -}}   </li>
+</ul>
+
+{%- endif -%}
+
+end
+--DATA--
+return array('leading' => 'leading space', 'trailing' => 'trailing space', 'both' => 'both')
+--EXPECT--
+15
+18
+
+Trim on control tag:
+123456789
+
+Trim on output tag:
+123456789
+
+Trim comments:After the comment.
+
+Trim leading space:
+leading space
+leading space
+
+Trim trailing space:
+trailing spaceCombined:<ul>
+        <li>both</li>
+</ul>end
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/aliases.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/aliases.test
new file mode 100644
index 00000000..f887006f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/aliases.test
@@ -0,0 +1,12 @@
+--TEST--
+"use" tag
+--TEMPLATE--
+{% use "blocks.twig" with content as foo %}
+
+{{ block('foo') }}
+--TEMPLATE(blocks.twig)--
+{% block content 'foo' %}
+--DATA--
+return array()
+--EXPECT--
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/basic.test
new file mode 100644
index 00000000..7364d76d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/basic.test
@@ -0,0 +1,12 @@
+--TEST--
+"use" tag
+--TEMPLATE--
+{% use "blocks.twig" %}
+
+{{ block('content') }}
+--TEMPLATE(blocks.twig)--
+{% block content 'foo' %}
+--DATA--
+return array()
+--EXPECT--
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/deep.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/deep.test
new file mode 100644
index 00000000..b551a1e6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/deep.test
@@ -0,0 +1,22 @@
+--TEST--
+"use" tag
+--TEMPLATE--
+{% use "foo.twig" %}
+
+{{ block('content') }}
+{{ block('foo') }}
+{{ block('bar') }}
+--TEMPLATE(foo.twig)--
+{% use "bar.twig" %}
+
+{% block content 'foo' %}
+{% block foo 'foo' %}
+--TEMPLATE(bar.twig)--
+{% block content 'bar' %}
+{% block bar 'bar' %}
+--DATA--
+return array()
+--EXPECT--
+foo
+foo
+bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/deep_empty.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/deep_empty.test
new file mode 100644
index 00000000..05cca682
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/deep_empty.test
@@ -0,0 +1,10 @@
+--TEST--
+"use" tag
+--TEMPLATE--
+{% use "foo.twig" %}
+--TEMPLATE(foo.twig)--
+{% use "bar.twig" %}
+--TEMPLATE(bar.twig)--
+--DATA--
+return array()
+--EXPECT--
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/multiple.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/multiple.test
new file mode 100644
index 00000000..198be0c5
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/multiple.test
@@ -0,0 +1,21 @@
+--TEST--
+"use" tag
+--TEMPLATE--
+{% use "foo.twig" %}
+{% use "bar.twig" %}
+
+{{ block('content') }}
+{{ block('foo') }}
+{{ block('bar') }}
+--TEMPLATE(foo.twig)--
+{% block content 'foo' %}
+{% block foo 'foo' %}
+--TEMPLATE(bar.twig)--
+{% block content 'bar' %}
+{% block bar 'bar' %}
+--DATA--
+return array()
+--EXPECT--
+bar
+foo
+bar
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/multiple_aliases.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/multiple_aliases.test
new file mode 100644
index 00000000..8de871a8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/use/multiple_aliases.test
@@ -0,0 +1,23 @@
+--TEST--
+"use" tag
+--TEMPLATE--
+{% use "foo.twig" with content as foo_content %}
+{% use "bar.twig" %}
+
+{{ block('content') }}
+{{ block('foo') }}
+{{ block('bar') }}
+{{ block('foo_content') }}
+--TEMPLATE(foo.twig)--
+{% block content 'foo' %}
+{% block foo 'foo' %}
+--TEMPLATE(bar.twig)--
+{% block content 'bar' %}
+{% block bar 'bar' %}
+--DATA--
+return array()
+--EXPECT--
+bar
+foo
+bar
+foo
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/basic.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/basic.test
new file mode 100644
index 00000000..a95be557
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/basic.test
@@ -0,0 +1,10 @@
+--TEST--
+"verbatim" tag
+--TEMPLATE--
+{% verbatim %}
+{{ foo }}
+{% endverbatim %}
+--DATA--
+return array()
+--EXPECT--
+{{ foo }}
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/mixed_usage_with_raw.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/mixed_usage_with_raw.test
new file mode 100644
index 00000000..941dddcc
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/mixed_usage_with_raw.test
@@ -0,0 +1,10 @@
+--TEST--
+"verbatim" tag
+--TEMPLATE--
+{% verbatim %}
+{{ foo }}
+{% endraw %}
+--DATA--
+return array()
+--EXCEPTION--
+Twig_Error_Syntax: Unexpected end of file: Unclosed "verbatim" block in "index.twig" at line 2
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/whitespace_control.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/whitespace_control.test
new file mode 100644
index 00000000..eb610444
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tags/verbatim/whitespace_control.test
@@ -0,0 +1,56 @@
+--TEST--
+"verbatim" tag
+--TEMPLATE--
+1***
+
+{%- verbatim %}
+    {{ 'bla' }}
+{% endverbatim %}
+
+1***
+2***
+
+{%- verbatim -%}
+    {{ 'bla' }}
+{% endverbatim %}
+
+2***
+3***
+
+{%- verbatim -%}
+    {{ 'bla' }}
+{% endverbatim -%}
+
+3***
+4***
+
+{%- verbatim -%}
+    {{ 'bla' }}
+{%- endverbatim %}
+
+4***
+5***
+
+{%- verbatim -%}
+    {{ 'bla' }}
+{%- endverbatim -%}
+
+5***
+--DATA--
+return array()
+--EXPECT--
+1***
+    {{ 'bla' }}
+
+
+1***
+2***{{ 'bla' }}
+
+
+2***
+3***{{ 'bla' }}
+3***
+4***{{ 'bla' }}
+
+4***
+5***{{ 'bla' }}5***
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/array.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/array.test
new file mode 100644
index 00000000..1429d375
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/array.test
@@ -0,0 +1,24 @@
+--TEST--
+array index test
+--TEMPLATE--
+{% for key, value in days %}
+{{ key }}
+{% endfor %}
+--DATA--
+return array('days' => array(
+    1  => array('money' => 9),
+    2  => array('money' => 21),
+    3  => array('money' => 38),
+    4  => array('money' => 6),
+    18 => array('money' => 6),
+    19 => array('money' => 3),
+    31 => array('money' => 11),
+));
+--EXPECT--
+1
+2
+3
+4
+18
+19
+31
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/constant.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/constant.test
new file mode 100644
index 00000000..60218ac0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/constant.test
@@ -0,0 +1,14 @@
+--TEST--
+"const" test
+--TEMPLATE--
+{{ 8 is constant('E_NOTICE') ? 'ok' : 'no' }}
+{{ 'bar' is constant('TwigTestFoo::BAR_NAME') ? 'ok' : 'no' }}
+{{ value is constant('TwigTestFoo::BAR_NAME') ? 'ok' : 'no' }}
+{{ 2 is constant('ARRAY_AS_PROPS', object) ? 'ok' : 'no' }}
+--DATA--
+return array('value' => 'bar', 'object' => new ArrayObject(array('hi')));
+--EXPECT--
+ok
+ok
+ok
+ok
\ No newline at end of file
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/defined.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/defined.test
new file mode 100644
index 00000000..cbfe03de
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/defined.test
@@ -0,0 +1,108 @@
+--TEST--
+"defined" test
+--TEMPLATE--
+{{ definedVar                     is     defined ? 'ok' : 'ko' }}
+{{ definedVar                     is not defined ? 'ko' : 'ok' }}
+{{ undefinedVar                   is     defined ? 'ko' : 'ok' }}
+{{ undefinedVar                   is not defined ? 'ok' : 'ko' }}
+{{ zeroVar                        is     defined ? 'ok' : 'ko' }}
+{{ nullVar                        is     defined ? 'ok' : 'ko' }}
+{{ nested.definedVar              is     defined ? 'ok' : 'ko' }}
+{{ nested['definedVar']           is     defined ? 'ok' : 'ko' }}
+{{ nested.definedVar              is not defined ? 'ko' : 'ok' }}
+{{ nested.undefinedVar            is     defined ? 'ko' : 'ok' }}
+{{ nested['undefinedVar']         is     defined ? 'ko' : 'ok' }}
+{{ nested.undefinedVar            is not defined ? 'ok' : 'ko' }}
+{{ nested.zeroVar                 is     defined ? 'ok' : 'ko' }}
+{{ nested.nullVar                 is     defined ? 'ok' : 'ko' }}
+{{ nested.definedArray.0          is     defined ? 'ok' : 'ko' }}
+{{ nested['definedArray'][0]      is     defined ? 'ok' : 'ko' }}
+{{ object.foo                     is     defined ? 'ok' : 'ko' }}
+{{ object.undefinedMethod         is     defined ? 'ko' : 'ok' }}
+{{ object.getFoo()                is     defined ? 'ok' : 'ko' }}
+{{ object.getFoo('a')             is     defined ? 'ok' : 'ko' }}
+{{ object.undefinedMethod()       is     defined ? 'ko' : 'ok' }}
+{{ object.undefinedMethod('a')    is     defined ? 'ko' : 'ok' }}
+{{ object.self.foo                is     defined ? 'ok' : 'ko' }}
+{{ object.self.undefinedMethod    is     defined ? 'ko' : 'ok' }}
+{{ object.undefinedMethod.self    is     defined ? 'ko' : 'ok' }}
+--DATA--
+return array(
+    'definedVar' => 'defined',
+    'zeroVar'    => 0,
+    'nullVar'    => null,
+    'nested'      => array(
+        'definedVar'   => 'defined',
+        'zeroVar'      => 0,
+        'nullVar'      => null,
+        'definedArray' => array(0),
+    ),
+    'object' => new TwigTestFoo(),
+);
+--EXPECT--
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+--DATA--
+return array(
+    'definedVar' => 'defined',
+    'zeroVar'    => 0,
+    'nullVar'    => null,
+    'nested'      => array(
+        'definedVar'   => 'defined',
+        'zeroVar'      => 0,
+        'nullVar'      => null,
+        'definedArray' => array(0),
+    ),
+    'object' => new TwigTestFoo(),
+);
+--CONFIG--
+return array('strict_variables' => false)
+--EXPECT--
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
+ok
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/empty.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/empty.test
new file mode 100644
index 00000000..a776d032
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/empty.test
@@ -0,0 +1,45 @@
+--TEST--
+"empty" test
+--TEMPLATE--
+{{ foo is empty ? 'ok' : 'ko' }}
+{{ bar is empty ? 'ok' : 'ko' }}
+{{ foobar is empty ? 'ok' : 'ko' }}
+{{ array is empty ? 'ok' : 'ko' }}
+{{ zero is empty ? 'ok' : 'ko' }}
+{{ string is empty ? 'ok' : 'ko' }}
+{{ countable_empty is empty ? 'ok' : 'ko' }}
+{{ countable_not_empty is empty ? 'ok' : 'ko' }}
+{{ markup_empty is empty ? 'ok' : 'ko' }}
+{{ markup_not_empty is empty ? 'ok' : 'ko' }}
+--DATA--
+
+class CountableStub implements Countable
+{
+    private $items;
+
+    public function __construct(array $items)
+    {
+        $this->items = $items;
+    }
+
+    public function count()
+    {
+        return count($this->items);
+    }
+}
+return array(
+    'foo' => '', 'bar' => null, 'foobar' => false, 'array' => array(), 'zero' => 0, 'string' => '0',
+    'countable_empty' => new CountableStub(array()), 'countable_not_empty' => new CountableStub(array(1, 2)),
+    'markup_empty' => new Twig_Markup('', 'UTF-8'), 'markup_not_empty' => new Twig_Markup('test', 'UTF-8'),
+);
+--EXPECT--
+ok
+ok
+ok
+ok
+ko
+ko
+ok
+ko
+ok
+ko
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/even.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/even.test
new file mode 100644
index 00000000..695b4c2f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/even.test
@@ -0,0 +1,14 @@
+--TEST--
+"even" test
+--TEMPLATE--
+{{ 1 is even ? 'ko' : 'ok' }}
+{{ 2 is even ? 'ok' : 'ko' }}
+{{ 1 is not even ? 'ok' : 'ko' }}
+{{ 2 is not even ? 'ko' : 'ok' }}
+--DATA--
+return array()
+--EXPECT--
+ok
+ok
+ok
+ok
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/in.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/in.test
new file mode 100644
index 00000000..45c72fd2
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/in.test
@@ -0,0 +1,48 @@
+--TEST--
+Twig supports the in operator
+--TEMPLATE--
+{% if bar in foo %}
+TRUE
+{% endif %}
+{% if not (bar in foo) %}
+{% else %}
+TRUE
+{% endif %}
+{% if bar not in foo %}
+{% else %}
+TRUE
+{% endif %}
+{% if 'a' in bar %}
+TRUE
+{% endif %}
+{% if 'c' not in bar %}
+TRUE
+{% endif %}
+{% if '' not in bar %}
+TRUE
+{% endif %}
+{% if '' in '' %}
+TRUE
+{% endif %}
+{% if '0' not in '' %}
+TRUE
+{% endif %}
+{% if 'a' not in '0' %}
+TRUE
+{% endif %}
+{% if '0' in '0' %}
+TRUE
+{% endif %}
+--DATA--
+return array('bar' => 'bar', 'foo' => array('bar' => 'bar'))
+--EXPECT--
+TRUE
+TRUE
+TRUE
+TRUE
+TRUE
+TRUE
+TRUE
+TRUE
+TRUE
+TRUE
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/in_with_objects.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/in_with_objects.test
new file mode 100644
index 00000000..8e08061b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/in_with_objects.test
@@ -0,0 +1,19 @@
+--TEST--
+Twig supports the in operator when using objects
+--TEMPLATE--
+{% if object in object_list %}
+TRUE
+{% endif %}
+--DATA--
+$foo = new TwigTestFoo();
+$foo1 = new TwigTestFoo();
+
+$foo->position = $foo1;
+$foo1->position = $foo;
+
+return array(
+    'object'      => $foo,
+    'object_list' => array($foo1, $foo),
+);
+--EXPECT--
+TRUE
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/iterable.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/iterable.test
new file mode 100644
index 00000000..ec525501
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/iterable.test
@@ -0,0 +1,19 @@
+--TEST--
+"iterable" test
+--TEMPLATE--
+{{ foo is iterable ? 'ok' : 'ko' }}
+{{ traversable is iterable ? 'ok' : 'ko' }}
+{{ obj is iterable ? 'ok' : 'ko' }}
+{{ val is iterable ? 'ok' : 'ko' }}
+--DATA--
+return array(
+    'foo' => array(),
+    'traversable' => new ArrayIterator(array()),
+    'obj' => new stdClass(),
+    'val' => 'test',
+);
+--EXPECT--
+ok
+ok
+ko
+ko
\ No newline at end of file
diff --git a/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/odd.test b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/odd.test
new file mode 100644
index 00000000..1b8311e3
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Fixtures/tests/odd.test
@@ -0,0 +1,10 @@
+--TEST--
+"odd" test
+--TEMPLATE--
+{{ 1 is odd ? 'ok' : 'ko' }}
+{{ 2 is odd ? 'ko' : 'ok' }}
+--DATA--
+return array()
+--EXPECT--
+ok
+ok
\ No newline at end of file
diff --git a/vendor/twig/twig/test/Twig/Tests/IntegrationTest.php b/vendor/twig/twig/test/Twig/Tests/IntegrationTest.php
new file mode 100644
index 00000000..5feb8f4e
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/IntegrationTest.php
@@ -0,0 +1,217 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+// This function is defined to check that escaping strategies
+// like html works even if a function with the same name is defined.
+function html()
+{
+    return 'foo';
+}
+
+class Twig_Tests_IntegrationTest extends Twig_Test_IntegrationTestCase
+{
+    public function getExtensions()
+    {
+        $policy = new Twig_Sandbox_SecurityPolicy(array(), array(), array(), array(), array());
+
+        return array(
+            new Twig_Extension_Debug(),
+            new Twig_Extension_Sandbox($policy, false),
+            new Twig_Extension_StringLoader(),
+            new TwigTestExtension(),
+        );
+    }
+
+    public function getFixturesDir()
+    {
+        return dirname(__FILE__).'/Fixtures/';
+    }
+}
+
+function test_foo($value = 'foo')
+{
+    return $value;
+}
+
+class TwigTestFoo implements Iterator
+{
+    const BAR_NAME = 'bar';
+
+    public $position = 0;
+    public $array = array(1, 2);
+
+    public function bar($param1 = null, $param2 = null)
+    {
+        return 'bar'.($param1 ? '_'.$param1 : '').($param2 ? '-'.$param2 : '');
+    }
+
+    public function getFoo()
+    {
+        return 'foo';
+    }
+
+    public function getSelf()
+    {
+        return $this;
+    }
+
+    public function is()
+    {
+        return 'is';
+    }
+
+    public function in()
+    {
+        return 'in';
+    }
+
+    public function not()
+    {
+        return 'not';
+    }
+
+    public function strToLower($value)
+    {
+        return strtolower($value);
+    }
+
+    public function rewind()
+    {
+        $this->position = 0;
+    }
+
+    public function current()
+    {
+        return $this->array[$this->position];
+    }
+
+    public function key()
+    {
+        return 'a';
+    }
+
+    public function next()
+    {
+        ++$this->position;
+    }
+
+    public function valid()
+    {
+        return isset($this->array[$this->position]);
+    }
+}
+
+class TwigTestTokenParser_§ extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Print(new Twig_Node_Expression_Constant('§', -1), -1);
+    }
+
+    public function getTag()
+    {
+        return '§';
+    }
+}
+
+class TwigTestExtension extends Twig_Extension
+{
+    public function getTokenParsers()
+    {
+        return array(
+            new TwigTestTokenParser_§(),
+        );
+    }
+
+    public function getFilters()
+    {
+        return array(
+            '§'                => new Twig_Filter_Method($this, '§Filter'),
+            'escape_and_nl2br' => new Twig_Filter_Method($this, 'escape_and_nl2br', array('needs_environment' => true, 'is_safe' => array('html'))),
+            'nl2br'            => new Twig_Filter_Method($this, 'nl2br', array('pre_escape' => 'html', 'is_safe' => array('html'))),
+            'escape_something' => new Twig_Filter_Method($this, 'escape_something', array('is_safe' => array('something'))),
+            'preserves_safety' => new Twig_Filter_Method($this, 'preserves_safety', array('preserves_safety' => array('html'))),
+            '*_path'           => new Twig_Filter_Method($this, 'dynamic_path'),
+            '*_foo_*_bar'      => new Twig_Filter_Method($this, 'dynamic_foo'),
+        );
+    }
+
+    public function getFunctions()
+    {
+        return array(
+            '§'           => new Twig_Function_Method($this, '§Function'),
+            'safe_br'     => new Twig_Function_Method($this, 'br', array('is_safe' => array('html'))),
+            'unsafe_br'   => new Twig_Function_Method($this, 'br'),
+            '*_path'      => new Twig_Function_Method($this, 'dynamic_path'),
+            '*_foo_*_bar' => new Twig_Function_Method($this, 'dynamic_foo'),
+        );
+    }
+
+    public function §Filter($value)
+    {
+        return "§{$value}§";
+    }
+
+    public function §Function($value)
+    {
+        return "§{$value}§";
+    }
+
+    /**
+     * nl2br which also escapes, for testing escaper filters
+     */
+    public function escape_and_nl2br($env, $value, $sep = '<br />')
+    {
+        return $this->nl2br(twig_escape_filter($env, $value, 'html'), $sep);
+    }
+
+    /**
+     * nl2br only, for testing filters with pre_escape
+     */
+    public function nl2br($value, $sep = '<br />')
+    {
+        // not secure if $value contains html tags (not only entities)
+        // don't use
+        return str_replace("\n", "$sep\n", $value);
+    }
+
+    public function dynamic_path($element, $item)
+    {
+        return $element.'/'.$item;
+    }
+
+    public function dynamic_foo($foo, $bar, $item)
+    {
+        return $foo.'/'.$bar.'/'.$item;
+    }
+
+    public function escape_something($value)
+    {
+        return strtoupper($value);
+    }
+
+    public function preserves_safety($value)
+    {
+        return strtoupper($value);
+    }
+
+    public function br()
+    {
+        return '<br />';
+    }
+
+    public function getName()
+    {
+        return 'integration_test';
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/LexerTest.php b/vendor/twig/twig/test/Twig/Tests/LexerTest.php
new file mode 100644
index 00000000..9f3c7510
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/LexerTest.php
@@ -0,0 +1,301 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Tests_LexerTest extends PHPUnit_Framework_TestCase
+{
+    public function testNameLabelForTag()
+    {
+        $template = '{% § %}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        $stream->expect(Twig_Token::BLOCK_START_TYPE);
+        $this->assertSame('§', $stream->expect(Twig_Token::NAME_TYPE)->getValue());
+    }
+
+    public function testNameLabelForFunction()
+    {
+        $template = '{{ §() }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        $stream->expect(Twig_Token::VAR_START_TYPE);
+        $this->assertSame('§', $stream->expect(Twig_Token::NAME_TYPE)->getValue());
+    }
+
+    public function testBracketsNesting()
+    {
+        $template = '{{ {"a":{"b":"c"}} }}';
+
+        $this->assertEquals(2, $this->countToken($template, Twig_Token::PUNCTUATION_TYPE, '{'));
+        $this->assertEquals(2, $this->countToken($template, Twig_Token::PUNCTUATION_TYPE, '}'));
+    }
+
+    protected function countToken($template, $type, $value = null)
+    {
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        $count = 0;
+        $tokens = array();
+        while (!$stream->isEOF()) {
+            $token = $stream->next();
+            if ($type === $token->getType()) {
+                if (null === $value || $value === $token->getValue()) {
+                    ++$count;
+                }
+            }
+        }
+
+        return $count;
+    }
+
+    public function testLineDirective()
+    {
+        $template = "foo\n"
+            . "bar\n"
+            . "{% line 10 %}\n"
+            . "{{\n"
+            . "baz\n"
+            . "}}\n";
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        // foo\nbar\n
+        $this->assertSame(1, $stream->expect(Twig_Token::TEXT_TYPE)->getLine());
+        // \n (after {% line %})
+        $this->assertSame(10, $stream->expect(Twig_Token::TEXT_TYPE)->getLine());
+        // {{
+        $this->assertSame(11, $stream->expect(Twig_Token::VAR_START_TYPE)->getLine());
+        // baz
+        $this->assertSame(12, $stream->expect(Twig_Token::NAME_TYPE)->getLine());
+    }
+
+    public function testLineDirectiveInline()
+    {
+        $template = "foo\n"
+            . "bar{% line 10 %}{{\n"
+            . "baz\n"
+            . "}}\n";
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        // foo\nbar
+        $this->assertSame(1, $stream->expect(Twig_Token::TEXT_TYPE)->getLine());
+        // {{
+        $this->assertSame(10, $stream->expect(Twig_Token::VAR_START_TYPE)->getLine());
+        // baz
+        $this->assertSame(11, $stream->expect(Twig_Token::NAME_TYPE)->getLine());
+    }
+
+    public function testLongComments()
+    {
+        $template = '{# '.str_repeat('*', 100000).' #}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $lexer->tokenize($template);
+
+        // should not throw an exception
+    }
+
+    public function testLongRaw()
+    {
+        $template = '{% raw %}'.str_repeat('*', 100000).'{% endraw %}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        // should not throw an exception
+    }
+
+    public function testLongVar()
+    {
+        $template = '{{ '.str_repeat('x', 100000).' }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        // should not throw an exception
+    }
+
+    public function testLongBlock()
+    {
+        $template = '{% '.str_repeat('x', 100000).' %}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+
+        // should not throw an exception
+    }
+
+    public function testBigNumbers()
+    {
+        $template = '{{ 922337203685477580700 }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+        $node = $stream->next();
+        $node = $stream->next();
+        $this->assertEquals(922337203685477580700, $node->getValue());
+    }
+
+    public function testStringWithEscapedDelimiter()
+    {
+        $tests = array(
+            "{{ 'foo \' bar' }}" => 'foo \' bar',
+            '{{ "foo \" bar" }}' => "foo \" bar",
+        );
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        foreach ($tests as $template => $expected) {
+            $stream = $lexer->tokenize($template);
+            $stream->expect(Twig_Token::VAR_START_TYPE);
+            $stream->expect(Twig_Token::STRING_TYPE, $expected);
+        }
+    }
+
+    public function testStringWithInterpolation()
+    {
+        $template = 'foo {{ "bar #{ baz + 1 }" }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+        $stream->expect(Twig_Token::TEXT_TYPE, 'foo ');
+        $stream->expect(Twig_Token::VAR_START_TYPE);
+        $stream->expect(Twig_Token::STRING_TYPE, 'bar ');
+        $stream->expect(Twig_Token::INTERPOLATION_START_TYPE);
+        $stream->expect(Twig_Token::NAME_TYPE, 'baz');
+        $stream->expect(Twig_Token::OPERATOR_TYPE, '+');
+        $stream->expect(Twig_Token::NUMBER_TYPE, '1');
+        $stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
+        $stream->expect(Twig_Token::VAR_END_TYPE);
+    }
+
+    public function testStringWithEscapedInterpolation()
+    {
+        $template = '{{ "bar \#{baz+1}" }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+        $stream->expect(Twig_Token::VAR_START_TYPE);
+        $stream->expect(Twig_Token::STRING_TYPE, 'bar #{baz+1}');
+        $stream->expect(Twig_Token::VAR_END_TYPE);
+    }
+
+    public function testStringWithHash()
+    {
+        $template = '{{ "bar # baz" }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+        $stream->expect(Twig_Token::VAR_START_TYPE);
+        $stream->expect(Twig_Token::STRING_TYPE, 'bar # baz');
+        $stream->expect(Twig_Token::VAR_END_TYPE);
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @expectedExceptionMessage Unclosed """
+     */
+    public function testStringWithUnterminatedInterpolation()
+    {
+        $template = '{{ "bar #{x" }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+    }
+
+    public function testStringWithNestedInterpolations()
+    {
+        $template = '{{ "bar #{ "foo#{bar}" }" }}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+        $stream->expect(Twig_Token::VAR_START_TYPE);
+        $stream->expect(Twig_Token::STRING_TYPE, 'bar ');
+        $stream->expect(Twig_Token::INTERPOLATION_START_TYPE);
+        $stream->expect(Twig_Token::STRING_TYPE, 'foo');
+        $stream->expect(Twig_Token::INTERPOLATION_START_TYPE);
+        $stream->expect(Twig_Token::NAME_TYPE, 'bar');
+        $stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
+        $stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
+        $stream->expect(Twig_Token::VAR_END_TYPE);
+    }
+
+    public function testStringWithNestedInterpolationsInBlock()
+    {
+        $template = '{% foo "bar #{ "foo#{bar}" }" %}';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+        $stream->expect(Twig_Token::BLOCK_START_TYPE);
+        $stream->expect(Twig_Token::NAME_TYPE, 'foo');
+        $stream->expect(Twig_Token::STRING_TYPE, 'bar ');
+        $stream->expect(Twig_Token::INTERPOLATION_START_TYPE);
+        $stream->expect(Twig_Token::STRING_TYPE, 'foo');
+        $stream->expect(Twig_Token::INTERPOLATION_START_TYPE);
+        $stream->expect(Twig_Token::NAME_TYPE, 'bar');
+        $stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
+        $stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+    }
+
+    public function testOperatorEndingWithALetterAtTheEndOfALine()
+    {
+        $template = "{{ 1 and\n0}}";
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+        $stream->expect(Twig_Token::VAR_START_TYPE);
+        $stream->expect(Twig_Token::NUMBER_TYPE, 1);
+        $stream->expect(Twig_Token::OPERATOR_TYPE, 'and');
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @expectedExceptionMessage Unclosed "variable" at line 3
+     */
+    public function testUnterminatedVariable()
+    {
+        $template = '
+
+{{
+
+bar
+
+
+';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @expectedExceptionMessage Unclosed "block" at line 3
+     */
+    public function testUnterminatedBlock()
+    {
+        $template = '
+
+{%
+
+bar
+
+
+';
+
+        $lexer = new Twig_Lexer(new Twig_Environment());
+        $stream = $lexer->tokenize($template);
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/ArrayTest.php b/vendor/twig/twig/test/Twig/Tests/Loader/ArrayTest.php
new file mode 100644
index 00000000..1369a6bd
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/ArrayTest.php
@@ -0,0 +1,97 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Loader_ArrayTest extends PHPUnit_Framework_TestCase
+{
+    public function testGetSource()
+    {
+        $loader = new Twig_Loader_Array(array('foo' => 'bar'));
+
+        $this->assertEquals('bar', $loader->getSource('foo'));
+    }
+
+    /**
+     * @expectedException Twig_Error_Loader
+     */
+    public function testGetSourceWhenTemplateDoesNotExist()
+    {
+        $loader = new Twig_Loader_Array(array());
+
+        $loader->getSource('foo');
+    }
+
+    public function testGetCacheKey()
+    {
+        $loader = new Twig_Loader_Array(array('foo' => 'bar'));
+
+        $this->assertEquals('bar', $loader->getCacheKey('foo'));
+    }
+
+    /**
+     * @expectedException Twig_Error_Loader
+     */
+    public function testGetCacheKeyWhenTemplateDoesNotExist()
+    {
+        $loader = new Twig_Loader_Array(array());
+
+        $loader->getCacheKey('foo');
+    }
+
+    public function testSetTemplate()
+    {
+        $loader = new Twig_Loader_Array(array());
+        $loader->setTemplate('foo', 'bar');
+
+        $this->assertEquals('bar', $loader->getSource('foo'));
+    }
+
+    public function testIsFresh()
+    {
+        $loader = new Twig_Loader_Array(array('foo' => 'bar'));
+        $this->assertTrue($loader->isFresh('foo', time()));
+    }
+
+    /**
+     * @expectedException Twig_Error_Loader
+     */
+    public function testIsFreshWhenTemplateDoesNotExist()
+    {
+        $loader = new Twig_Loader_Array(array());
+
+        $loader->isFresh('foo', time());
+    }
+
+    public function testTemplateReference()
+    {
+        $name = new Twig_Test_Loader_TemplateReference('foo');
+        $loader = new Twig_Loader_Array(array('foo' => 'bar'));
+
+        $loader->getCacheKey($name);
+        $loader->getSource($name);
+        $loader->isFresh($name, time());
+        $loader->setTemplate($name, 'foobar');
+    }
+}
+
+class Twig_Test_Loader_TemplateReference
+{
+    private $name;
+
+    public function __construct($name)
+    {
+        $this->name = $name;
+    }
+
+    public function __toString()
+    {
+        return $this->name;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/ChainTest.php b/vendor/twig/twig/test/Twig/Tests/Loader/ChainTest.php
new file mode 100644
index 00000000..4fe0db94
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/ChainTest.php
@@ -0,0 +1,79 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Loader_ChainTest extends PHPUnit_Framework_TestCase
+{
+    public function testGetSource()
+    {
+        $loader = new Twig_Loader_Chain(array(
+            new Twig_Loader_Array(array('foo' => 'bar')),
+            new Twig_Loader_Array(array('foo' => 'foobar', 'bar' => 'foo')),
+        ));
+
+        $this->assertEquals('bar', $loader->getSource('foo'));
+        $this->assertEquals('foo', $loader->getSource('bar'));
+    }
+
+    /**
+     * @expectedException Twig_Error_Loader
+     */
+    public function testGetSourceWhenTemplateDoesNotExist()
+    {
+        $loader = new Twig_Loader_Chain(array());
+
+        $loader->getSource('foo');
+    }
+
+    public function testGetCacheKey()
+    {
+        $loader = new Twig_Loader_Chain(array(
+            new Twig_Loader_Array(array('foo' => 'bar')),
+            new Twig_Loader_Array(array('foo' => 'foobar', 'bar' => 'foo')),
+        ));
+
+        $this->assertEquals('bar', $loader->getCacheKey('foo'));
+        $this->assertEquals('foo', $loader->getCacheKey('bar'));
+    }
+
+    /**
+     * @expectedException Twig_Error_Loader
+     */
+    public function testGetCacheKeyWhenTemplateDoesNotExist()
+    {
+        $loader = new Twig_Loader_Chain(array());
+
+        $loader->getCacheKey('foo');
+    }
+
+    public function testAddLoader()
+    {
+        $loader = new Twig_Loader_Chain();
+        $loader->addLoader(new Twig_Loader_Array(array('foo' => 'bar')));
+
+        $this->assertEquals('bar', $loader->getSource('foo'));
+    }
+
+    public function testExists()
+    {
+        $loader1 = $this->getMock('Twig_Loader_Array', array('exists', 'getSource'), array(), '', false);
+        $loader1->expects($this->once())->method('exists')->will($this->returnValue(false));
+        $loader1->expects($this->never())->method('getSource');
+
+        $loader2 = $this->getMock('Twig_LoaderInterface');
+        $loader2->expects($this->once())->method('getSource')->will($this->returnValue('content'));
+
+        $loader = new Twig_Loader_Chain();
+        $loader->addLoader($loader1);
+        $loader->addLoader($loader2);
+
+        $this->assertTrue($loader->exists('foo'));
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/FilesystemTest.php b/vendor/twig/twig/test/Twig/Tests/Loader/FilesystemTest.php
new file mode 100644
index 00000000..4c874b6b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/FilesystemTest.php
@@ -0,0 +1,97 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Loader_FilesystemTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider getSecurityTests
+     */
+    public function testSecurity($template)
+    {
+        $loader = new Twig_Loader_Filesystem(array(dirname(__FILE__).'/../Fixtures'));
+
+        try {
+            $loader->getCacheKey($template);
+            $this->fail();
+        } catch (Twig_Error_Loader $e) {
+            $this->assertNotContains('Unable to find template', $e->getMessage());
+        }
+    }
+
+    public function getSecurityTests()
+    {
+        return array(
+            array("AutoloaderTest\0.php"),
+            array('..\\AutoloaderTest.php'),
+            array('..\\\\\\AutoloaderTest.php'),
+            array('../AutoloaderTest.php'),
+            array('..////AutoloaderTest.php'),
+            array('./../AutoloaderTest.php'),
+            array('.\\..\\AutoloaderTest.php'),
+            array('././././././../AutoloaderTest.php'),
+            array('.\\./.\\./.\\./../AutoloaderTest.php'),
+            array('foo/../../AutoloaderTest.php'),
+            array('foo\\..\\..\\AutoloaderTest.php'),
+            array('foo/../bar/../../AutoloaderTest.php'),
+            array('foo/bar/../../../AutoloaderTest.php'),
+            array('filters/../../AutoloaderTest.php'),
+            array('filters//..//..//AutoloaderTest.php'),
+            array('filters\\..\\..\\AutoloaderTest.php'),
+            array('filters\\\\..\\\\..\\\\AutoloaderTest.php'),
+            array('filters\\//../\\/\\..\\AutoloaderTest.php'),
+            array('/../AutoloaderTest.php'),
+        );
+    }
+
+    public function testPaths()
+    {
+        $basePath = dirname(__FILE__).'/Fixtures';
+
+        $loader = new Twig_Loader_Filesystem(array($basePath.'/normal', $basePath.'/normal_bis'));
+        $loader->setPaths(array($basePath.'/named', $basePath.'/named_bis'), 'named');
+        $loader->addPath($basePath.'/named_ter', 'named');
+        $loader->addPath($basePath.'/normal_ter');
+        $loader->prependPath($basePath.'/normal_final');
+        $loader->prependPath($basePath.'/named_final', 'named');
+
+        $this->assertEquals(array(
+            $basePath.'/normal_final',
+            $basePath.'/normal',
+            $basePath.'/normal_bis',
+            $basePath.'/normal_ter',
+        ), $loader->getPaths());
+        $this->assertEquals(array(
+            $basePath.'/named_final',
+            $basePath.'/named',
+            $basePath.'/named_bis',
+            $basePath.'/named_ter',
+        ), $loader->getPaths('named'));
+
+        $this->assertEquals("path (final)\n", $loader->getSource('index.html'));
+        $this->assertEquals("path (final)\n", $loader->getSource('@__main__/index.html'));
+        $this->assertEquals("named path (final)\n", $loader->getSource('@named/index.html'));
+    }
+
+    public function testEmptyConstructor()
+    {
+        $loader = new Twig_Loader_Filesystem();
+        $this->assertEquals(array(), $loader->getPaths());
+    }
+
+    public function testGetNamespaces()
+    {
+        $loader = new Twig_Loader_Filesystem(sys_get_temp_dir());
+        $this->assertEquals(array(Twig_Loader_Filesystem::MAIN_NAMESPACE), $loader->getNamespaces());
+
+        $loader->addPath(sys_get_temp_dir(), 'named');
+        $this->assertEquals(array(Twig_Loader_Filesystem::MAIN_NAMESPACE, 'named'), $loader->getNamespaces());
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named/index.html
new file mode 100644
index 00000000..9e5449c7
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named/index.html
@@ -0,0 +1 @@
+named path
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_bis/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_bis/index.html
new file mode 100644
index 00000000..d3a272b1
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_bis/index.html
@@ -0,0 +1 @@
+named path (bis)
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_final/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_final/index.html
new file mode 100644
index 00000000..9f05d150
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_final/index.html
@@ -0,0 +1 @@
+named path (final)
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_ter/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_ter/index.html
new file mode 100644
index 00000000..24fb68ad
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/named_ter/index.html
@@ -0,0 +1 @@
+named path (ter)
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal/index.html
new file mode 100644
index 00000000..e7a8fd4d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal/index.html
@@ -0,0 +1 @@
+path
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_bis/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_bis/index.html
new file mode 100644
index 00000000..bfa91604
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_bis/index.html
@@ -0,0 +1 @@
+path (bis)
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_final/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_final/index.html
new file mode 100644
index 00000000..73a089bb
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_final/index.html
@@ -0,0 +1 @@
+path (final)
diff --git a/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_ter/index.html b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_ter/index.html
new file mode 100644
index 00000000..b7ad97d8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Loader/Fixtures/normal_ter/index.html
@@ -0,0 +1 @@
+path (ter)
diff --git a/vendor/twig/twig/test/Twig/Tests/NativeExtensionTest.php b/vendor/twig/twig/test/Twig/Tests/NativeExtensionTest.php
new file mode 100644
index 00000000..3fafd335
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/NativeExtensionTest.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_NativeExtensionTest extends PHPUnit_Framework_TestCase
+{
+    public function testGetProperties()
+    {
+        $twig = new Twig_Environment(new Twig_Loader_String(), array(
+            'debug'      => true,
+            'cache'      => false,
+            'autoescape' => false
+        ));
+
+        $d1 = new DateTime();
+        $d2 = new DateTime();
+        $output = $twig->render('{{ d1.date }}{{ d2.date }}', compact('d1', 'd2'));
+
+        // If it fails, PHP will crash.
+        $this->assertEquals($output, $d1->date . $d2->date);
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/AutoEscapeTest.php b/vendor/twig/twig/test/Twig/Tests/Node/AutoEscapeTest.php
new file mode 100644
index 00000000..608446bc
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/AutoEscapeTest.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_AutoEscapeTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_AutoEscape::__construct
+     */
+    public function testConstructor()
+    {
+        $body = new Twig_Node(array(new Twig_Node_Text('foo', 1)));
+        $node = new Twig_Node_AutoEscape(true, $body, 1);
+
+        $this->assertEquals($body, $node->getNode('body'));
+        $this->assertEquals(true, $node->getAttribute('value'));
+    }
+
+    /**
+     * @covers Twig_Node_AutoEscape::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $body = new Twig_Node(array(new Twig_Node_Text('foo', 1)));
+        $node = new Twig_Node_AutoEscape(true, $body, 1);
+
+        return array(
+            array($node, "// line 1\necho \"foo\";"),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/BlockReferenceTest.php b/vendor/twig/twig/test/Twig/Tests/Node/BlockReferenceTest.php
new file mode 100644
index 00000000..96d0e101
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/BlockReferenceTest.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_BlockReferenceTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_BlockReference::__construct
+     */
+    public function testConstructor()
+    {
+        $node = new Twig_Node_BlockReference('foo', 1);
+
+        $this->assertEquals('foo', $node->getAttribute('name'));
+    }
+
+    /**
+     * @covers Twig_Node_BlockReference::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        return array(
+            array(new Twig_Node_BlockReference('foo', 1), <<<EOF
+// line 1
+\$this->displayBlock('foo', \$context, \$blocks);
+EOF
+            ),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/BlockTest.php b/vendor/twig/twig/test/Twig/Tests/Node/BlockTest.php
new file mode 100644
index 00000000..024049de
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/BlockTest.php
@@ -0,0 +1,51 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_BlockTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Block::__construct
+     */
+    public function testConstructor()
+    {
+        $body = new Twig_Node_Text('foo', 1);
+        $node = new Twig_Node_Block('foo', $body, 1);
+
+        $this->assertEquals($body, $node->getNode('body'));
+        $this->assertEquals('foo', $node->getAttribute('name'));
+    }
+
+    /**
+     * @covers Twig_Node_Block::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $body = new Twig_Node_Text('foo', 1);
+        $node = new Twig_Node_Block('foo', $body, 1);
+
+        return array(
+            array($node, <<<EOF
+// line 1
+public function block_foo(\$context, array \$blocks = array())
+{
+    echo "foo";
+}
+EOF
+            ),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/DoTest.php b/vendor/twig/twig/test/Twig/Tests/Node/DoTest.php
new file mode 100644
index 00000000..a406e22d
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/DoTest.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_DoTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Do::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant('foo', 1);
+        $node = new Twig_Node_Do($expr, 1);
+
+        $this->assertEquals($expr, $node->getNode('expr'));
+    }
+
+    /**
+     * @covers Twig_Node_Do::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $expr = new Twig_Node_Expression_Constant('foo', 1);
+        $node = new Twig_Node_Do($expr, 1);
+        $tests[] = array($node, "// line 1\n\"foo\";");
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/ArrayTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ArrayTest.php
new file mode 100644
index 00000000..c6a9044b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ArrayTest.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_ArrayTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Array::__construct
+     */
+    public function testConstructor()
+    {
+        $elements = array(new Twig_Node_Expression_Constant('foo', 1), $foo = new Twig_Node_Expression_Constant('bar', 1));
+        $node = new Twig_Node_Expression_Array($elements, 1);
+
+        $this->assertEquals($foo, $node->getNode(1));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Array::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $elements = array(
+            new Twig_Node_Expression_Constant('foo', 1),
+            new Twig_Node_Expression_Constant('bar', 1),
+
+            new Twig_Node_Expression_Constant('bar', 1),
+            new Twig_Node_Expression_Constant('foo', 1),
+        );
+        $node = new Twig_Node_Expression_Array($elements, 1);
+
+        return array(
+            array($node, 'array("foo" => "bar", "bar" => "foo")'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/AssignNameTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/AssignNameTest.php
new file mode 100644
index 00000000..b156dcc0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/AssignNameTest.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_AssignNameTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_AssignName::__construct
+     */
+    public function testConstructor()
+    {
+        $node = new Twig_Node_Expression_AssignName('foo', 1);
+
+        $this->assertEquals('foo', $node->getAttribute('name'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_AssignName::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $node = new Twig_Node_Expression_AssignName('foo', 1);
+
+        return array(
+            array($node, '$context["foo"]'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/AddTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/AddTest.php
new file mode 100644
index 00000000..a0f49cb3
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/AddTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_AddTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_Add::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Add($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_Add::compile
+     * @covers Twig_Node_Expression_Binary_Add::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Add($left, $right, 1);
+
+        return array(
+            array($node, '(1 + 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/AndTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/AndTest.php
new file mode 100644
index 00000000..50e551a7
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/AndTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_AndTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_And::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_And($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_And::compile
+     * @covers Twig_Node_Expression_Binary_And::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_And($left, $right, 1);
+
+        return array(
+            array($node, '(1 && 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/ConcatTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/ConcatTest.php
new file mode 100644
index 00000000..140329fa
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/ConcatTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_ConcatTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_Concat::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Concat($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_Concat::compile
+     * @covers Twig_Node_Expression_Binary_Concat::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Concat($left, $right, 1);
+
+        return array(
+            array($node, '(1 . 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/DivTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/DivTest.php
new file mode 100644
index 00000000..0c1a3c7f
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/DivTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_DivTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_Div::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Div($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_Div::compile
+     * @covers Twig_Node_Expression_Binary_Div::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Div($left, $right, 1);
+
+        return array(
+            array($node, '(1 / 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/FloorDivTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/FloorDivTest.php
new file mode 100644
index 00000000..ead1fde8
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/FloorDivTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_FloorDivTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_FloorDiv::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_FloorDiv($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_FloorDiv::compile
+     * @covers Twig_Node_Expression_Binary_FloorDiv::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_FloorDiv($left, $right, 1);
+
+        return array(
+            array($node, 'intval(floor((1 / 2)))'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/ModTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/ModTest.php
new file mode 100644
index 00000000..4fe1a1fc
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/ModTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_ModTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_Mod::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Mod($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_Mod::compile
+     * @covers Twig_Node_Expression_Binary_Mod::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Mod($left, $right, 1);
+
+        return array(
+            array($node, '(1 % 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/MulTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/MulTest.php
new file mode 100644
index 00000000..12bb35c9
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/MulTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_MulTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_Mul::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Mul($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_Mul::compile
+     * @covers Twig_Node_Expression_Binary_Mul::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Mul($left, $right, 1);
+
+        return array(
+            array($node, '(1 * 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/OrTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/OrTest.php
new file mode 100644
index 00000000..9534c41c
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/OrTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_OrTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_Or::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Or($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_Or::compile
+     * @covers Twig_Node_Expression_Binary_Or::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Or($left, $right, 1);
+
+        return array(
+            array($node, '(1 || 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/SubTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/SubTest.php
new file mode 100644
index 00000000..9074893b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Binary/SubTest.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Binary_SubTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Binary_Sub::__construct
+     */
+    public function testConstructor()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Sub($left, $right, 1);
+
+        $this->assertEquals($left, $node->getNode('left'));
+        $this->assertEquals($right, $node->getNode('right'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Binary_Sub::compile
+     * @covers Twig_Node_Expression_Binary_Sub::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $left = new Twig_Node_Expression_Constant(1, 1);
+        $right = new Twig_Node_Expression_Constant(2, 1);
+        $node = new Twig_Node_Expression_Binary_Sub($left, $right, 1);
+
+        return array(
+            array($node, '(1 - 2)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/CallTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/CallTest.php
new file mode 100644
index 00000000..53b5e6ee
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/CallTest.php
@@ -0,0 +1,67 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_CallTest extends PHPUnit_Framework_TestCase
+{
+    public function testGetArguments()
+    {
+        $node = new Twig_Tests_Node_Expression_Call(array(), array('type' => 'function', 'name' => 'date'));
+        $this->assertEquals(array('U'), $node->getArguments('date', array('format' => 'U')));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage Positional arguments cannot be used after named arguments for function "date".
+     */
+    public function testGetArgumentsWhenPositionalArgumentsAfterNamedArguments()
+    {
+        $node = new Twig_Tests_Node_Expression_Call(array(), array('type' => 'function', 'name' => 'date'));
+        $node->getArguments('date', array('timestamp' => 123456, 'Y-m-d'));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage Argument "format" is defined twice for function "date".
+     */
+    public function testGetArgumentsWhenArgumentIsDefinedTwice()
+    {
+        $node = new Twig_Tests_Node_Expression_Call(array(), array('type' => 'function', 'name' => 'date'));
+        $node->getArguments('date', array('Y-m-d', 'format' => 'U'));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage Unknown argument "unknown" for function "date".
+     */
+    public function testGetArgumentsWithWrongNamedArgumentName()
+    {
+        $node = new Twig_Tests_Node_Expression_Call(array(), array('type' => 'function', 'name' => 'date'));
+        $node->getArguments('date', array('Y-m-d', 'unknown' => ''));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage Unknown arguments "unknown1", "unknown2" for function "date".
+     */
+    public function testGetArgumentsWithWrongNamedArgumentNames()
+    {
+        $node = new Twig_Tests_Node_Expression_Call(array(), array('type' => 'function', 'name' => 'date'));
+        $node->getArguments('date', array('Y-m-d', 'unknown1' => '', 'unknown2' => ''));
+    }
+}
+
+class Twig_Tests_Node_Expression_Call extends Twig_Node_Expression_Call
+{
+    public function getArguments($callable, $arguments)
+    {
+        return parent::getArguments($callable, $arguments);
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/ConditionalTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ConditionalTest.php
new file mode 100644
index 00000000..9906d512
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ConditionalTest.php
@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_ConditionalTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Conditional::__construct
+     */
+    public function testConstructor()
+    {
+        $expr1 = new Twig_Node_Expression_Constant(1, 1);
+        $expr2 = new Twig_Node_Expression_Constant(2, 1);
+        $expr3 = new Twig_Node_Expression_Constant(3, 1);
+        $node = new Twig_Node_Expression_Conditional($expr1, $expr2, $expr3, 1);
+
+        $this->assertEquals($expr1, $node->getNode('expr1'));
+        $this->assertEquals($expr2, $node->getNode('expr2'));
+        $this->assertEquals($expr3, $node->getNode('expr3'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Conditional::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $expr1 = new Twig_Node_Expression_Constant(1, 1);
+        $expr2 = new Twig_Node_Expression_Constant(2, 1);
+        $expr3 = new Twig_Node_Expression_Constant(3, 1);
+        $node = new Twig_Node_Expression_Conditional($expr1, $expr2, $expr3, 1);
+        $tests[] = array($node, '((1) ? (2) : (3))');
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/ConstantTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ConstantTest.php
new file mode 100644
index 00000000..d0dec531
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ConstantTest.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_ConstantTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Constant::__construct
+     */
+    public function testConstructor()
+    {
+        $node = new Twig_Node_Expression_Constant('foo', 1);
+
+        $this->assertEquals('foo', $node->getAttribute('value'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Constant::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $node = new Twig_Node_Expression_Constant('foo', 1);
+        $tests[] = array($node, '"foo"');
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/FilterTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/FilterTest.php
new file mode 100644
index 00000000..8089b9cb
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/FilterTest.php
@@ -0,0 +1,133 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_FilterTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Filter::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant('foo', 1);
+        $name = new Twig_Node_Expression_Constant('upper', 1);
+        $args = new Twig_Node();
+        $node = new Twig_Node_Expression_Filter($expr, $name, $args, 1);
+
+        $this->assertEquals($expr, $node->getNode('node'));
+        $this->assertEquals($name, $node->getNode('filter'));
+        $this->assertEquals($args, $node->getNode('arguments'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Filter::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $expr = new Twig_Node_Expression_Constant('foo', 1);
+        $node = $this->createFilter($expr, 'upper');
+        $node = $this->createFilter($node, 'number_format', array(new Twig_Node_Expression_Constant(2, 1), new Twig_Node_Expression_Constant('.', 1), new Twig_Node_Expression_Constant(',', 1)));
+
+        if (function_exists('mb_get_info')) {
+            $tests[] = array($node, 'twig_number_format_filter($this->env, twig_upper_filter($this->env, "foo"), 2, ".", ",")');
+        } else {
+            $tests[] = array($node, 'twig_number_format_filter($this->env, strtoupper("foo"), 2, ".", ",")');
+        }
+
+        // named arguments
+        $date = new Twig_Node_Expression_Constant(0, 1);
+        $node = $this->createFilter($date, 'date', array(
+            'timezone' => new Twig_Node_Expression_Constant('America/Chicago', 1),
+            'format'   => new Twig_Node_Expression_Constant('d/m/Y H:i:s P', 1),
+        ));
+        $tests[] = array($node, 'twig_date_format_filter($this->env, 0, "d/m/Y H:i:s P", "America/Chicago")');
+
+        // skip an optional argument
+        $date = new Twig_Node_Expression_Constant(0, 1);
+        $node = $this->createFilter($date, 'date', array(
+            'timezone' => new Twig_Node_Expression_Constant('America/Chicago', 1),
+        ));
+        $tests[] = array($node, 'twig_date_format_filter($this->env, 0, null, "America/Chicago")');
+
+        // underscores vs camelCase for named arguments
+        $string = new Twig_Node_Expression_Constant('abc', 1);
+        $node = $this->createFilter($string, 'reverse', array(
+            'preserve_keys' => new Twig_Node_Expression_Constant(true, 1),
+        ));
+        $tests[] = array($node, 'twig_reverse_filter($this->env, "abc", true)');
+        $node = $this->createFilter($string, 'reverse', array(
+            'preserveKeys' => new Twig_Node_Expression_Constant(true, 1),
+        ));
+        $tests[] = array($node, 'twig_reverse_filter($this->env, "abc", true)');
+
+        // filter as an anonymous function
+        if (version_compare(phpversion(), '5.3.0', '>=')) {
+            $node = $this->createFilter(new Twig_Node_Expression_Constant('foo', 1), 'anonymous');
+            $tests[] = array($node, 'call_user_func_array($this->env->getFilter(\'anonymous\')->getCallable(), array("foo"))');
+        }
+
+        return $tests;
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage Unknown argument "foobar" for filter "date".
+     */
+    public function testCompileWithWrongNamedArgumentName()
+    {
+        $date = new Twig_Node_Expression_Constant(0, 1);
+        $node = $this->createFilter($date, 'date', array(
+            'foobar' => new Twig_Node_Expression_Constant('America/Chicago', 1),
+        ));
+
+        $compiler = $this->getCompiler();
+        $compiler->compile($node);
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage Value for argument "from" is required for filter "replace".
+     */
+    public function testCompileWithMissingNamedArgument()
+    {
+        $value = new Twig_Node_Expression_Constant(0, 1);
+        $node = $this->createFilter($value, 'replace', array(
+            'to' => new Twig_Node_Expression_Constant('foo', 1),
+        ));
+
+        $compiler = $this->getCompiler();
+        $compiler->compile($node);
+    }
+
+    protected function createFilter($node, $name, array $arguments = array())
+    {
+        $name = new Twig_Node_Expression_Constant($name, 1);
+        $arguments = new Twig_Node($arguments);
+
+        return new Twig_Node_Expression_Filter($node, $name, $arguments, 1);
+    }
+
+    protected function getEnvironment()
+    {
+        if (version_compare(phpversion(), '5.3.0', '>=')) {
+            return include 'PHP53/FilterInclude.php';
+        }
+
+        return parent::getEnvironment();
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/FunctionTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/FunctionTest.php
new file mode 100644
index 00000000..431dc387
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/FunctionTest.php
@@ -0,0 +1,99 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_FunctionTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Function::__construct
+     */
+    public function testConstructor()
+    {
+        $name = 'function';
+        $args = new Twig_Node();
+        $node = new Twig_Node_Expression_Function($name, $args, 1);
+
+        $this->assertEquals($name, $node->getAttribute('name'));
+        $this->assertEquals($args, $node->getNode('arguments'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Function::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $environment = new Twig_Environment();
+        $environment->addFunction('foo', new Twig_Function_Function('foo', array()));
+        $environment->addFunction('bar', new Twig_Function_Function('bar', array('needs_environment' => true)));
+        $environment->addFunction('foofoo', new Twig_Function_Function('foofoo', array('needs_context' => true)));
+        $environment->addFunction('foobar', new Twig_Function_Function('foobar', array('needs_environment' => true, 'needs_context' => true)));
+
+        $tests = array();
+
+        $node = $this->createFunction('foo');
+        $tests[] = array($node, 'foo()', $environment);
+
+        $node = $this->createFunction('foo', array(new Twig_Node_Expression_Constant('bar', 1), new Twig_Node_Expression_Constant('foobar', 1)));
+        $tests[] = array($node, 'foo("bar", "foobar")', $environment);
+
+        $node = $this->createFunction('bar');
+        $tests[] = array($node, 'bar($this->env)', $environment);
+
+        $node = $this->createFunction('bar', array(new Twig_Node_Expression_Constant('bar', 1)));
+        $tests[] = array($node, 'bar($this->env, "bar")', $environment);
+
+        $node = $this->createFunction('foofoo');
+        $tests[] = array($node, 'foofoo($context)', $environment);
+
+        $node = $this->createFunction('foofoo', array(new Twig_Node_Expression_Constant('bar', 1)));
+        $tests[] = array($node, 'foofoo($context, "bar")', $environment);
+
+        $node = $this->createFunction('foobar');
+        $tests[] = array($node, 'foobar($this->env, $context)', $environment);
+
+        $node = $this->createFunction('foobar', array(new Twig_Node_Expression_Constant('bar', 1)));
+        $tests[] = array($node, 'foobar($this->env, $context, "bar")', $environment);
+
+        // named arguments
+        $node = $this->createFunction('date', array(
+            'timezone' => new Twig_Node_Expression_Constant('America/Chicago', 1),
+            'date'     => new Twig_Node_Expression_Constant(0, 1),
+        ));
+        $tests[] = array($node, 'twig_date_converter($this->env, 0, "America/Chicago")');
+
+        // function as an anonymous function
+        if (version_compare(phpversion(), '5.3.0', '>=')) {
+            $node = $this->createFunction('anonymous', array(new Twig_Node_Expression_Constant('foo', 1)));
+            $tests[] = array($node, 'call_user_func_array($this->env->getFunction(\'anonymous\')->getCallable(), array("foo"))');
+        }
+
+        return $tests;
+    }
+
+    protected function createFunction($name, array $arguments = array())
+    {
+        return new Twig_Node_Expression_Function($name, new Twig_Node($arguments), 1);
+    }
+
+    protected function getEnvironment()
+    {
+        if (version_compare(phpversion(), '5.3.0', '>=')) {
+            return include 'PHP53/FunctionInclude.php';
+        }
+
+        return parent::getEnvironment();
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/GetAttrTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/GetAttrTest.php
new file mode 100644
index 00000000..6a63cce6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/GetAttrTest.php
@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_GetAttrTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_GetAttr::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Name('foo', 1);
+        $attr = new Twig_Node_Expression_Constant('bar', 1);
+        $args = new Twig_Node_Expression_Array(array(), 1);
+        $args->addElement(new Twig_Node_Expression_Name('foo', 1));
+        $args->addElement(new Twig_Node_Expression_Constant('bar', 1));
+        $node = new Twig_Node_Expression_GetAttr($expr, $attr, $args, Twig_TemplateInterface::ARRAY_CALL, 1);
+
+        $this->assertEquals($expr, $node->getNode('node'));
+        $this->assertEquals($attr, $node->getNode('attribute'));
+        $this->assertEquals($args, $node->getNode('arguments'));
+        $this->assertEquals(Twig_TemplateInterface::ARRAY_CALL, $node->getAttribute('type'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_GetAttr::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $expr = new Twig_Node_Expression_Name('foo', 1);
+        $attr = new Twig_Node_Expression_Constant('bar', 1);
+        $args = new Twig_Node_Expression_Array(array(), 1);
+        $node = new Twig_Node_Expression_GetAttr($expr, $attr, $args, Twig_TemplateInterface::ANY_CALL, 1);
+        $tests[] = array($node, sprintf('%s%s, "bar")', $this->getAttributeGetter(), $this->getVariableGetter('foo')));
+
+        $node = new Twig_Node_Expression_GetAttr($expr, $attr, $args, Twig_TemplateInterface::ARRAY_CALL, 1);
+        $tests[] = array($node, sprintf('%s%s, "bar", array(), "array")', $this->getAttributeGetter(), $this->getVariableGetter('foo')));
+
+        $args = new Twig_Node_Expression_Array(array(), 1);
+        $args->addElement(new Twig_Node_Expression_Name('foo', 1));
+        $args->addElement(new Twig_Node_Expression_Constant('bar', 1));
+        $node = new Twig_Node_Expression_GetAttr($expr, $attr, $args, Twig_TemplateInterface::METHOD_CALL, 1);
+        $tests[] = array($node, sprintf('%s%s, "bar", array(0 => %s, 1 => "bar"), "method")', $this->getAttributeGetter(), $this->getVariableGetter('foo'), $this->getVariableGetter('foo')));
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/NameTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/NameTest.php
new file mode 100644
index 00000000..76d109b6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/NameTest.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_NameTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Name::__construct
+     */
+    public function testConstructor()
+    {
+        $node = new Twig_Node_Expression_Name('foo', 1);
+
+        $this->assertEquals('foo', $node->getAttribute('name'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Name::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $node = new Twig_Node_Expression_Name('foo', 1);
+        $self = new Twig_Node_Expression_Name('_self', 1);
+        $context = new Twig_Node_Expression_Name('_context', 1);
+
+        $env = new Twig_Environment(null, array('strict_variables' => true));
+        $env1 = new Twig_Environment(null, array('strict_variables' => false));
+
+        return array(
+            version_compare(PHP_VERSION, '5.4.0') >= 0 ? array($node, '(isset($context["foo"]) ? $context["foo"] : $this->getContext($context, "foo"))', $env) : array($node, '$this->getContext($context, "foo")', $env),
+            array($node, $this->getVariableGetter('foo'), $env1),
+            array($self, '$this'),
+            array($context, '$context'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/FilterInclude.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/FilterInclude.php
new file mode 100644
index 00000000..15e3aa96
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/FilterInclude.php
@@ -0,0 +1,6 @@
+<?php
+
+$env = new Twig_Environment();
+$env->addFilter(new Twig_SimpleFilter('anonymous', function () {}));
+
+return $env;
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/FunctionInclude.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/FunctionInclude.php
new file mode 100644
index 00000000..d2170ed2
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/FunctionInclude.php
@@ -0,0 +1,6 @@
+<?php
+
+$env = new Twig_Environment();
+$env->addFunction(new Twig_SimpleFunction('anonymous', function () {}));
+
+return $env;
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/TestInclude.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/TestInclude.php
new file mode 100644
index 00000000..63662864
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/PHP53/TestInclude.php
@@ -0,0 +1,6 @@
+<?php
+
+$env = new Twig_Environment();
+$env->addTest(new Twig_SimpleTest('anonymous', function () {}));
+
+return $env;
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/ParentTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ParentTest.php
new file mode 100644
index 00000000..4d40419b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/ParentTest.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_ParentTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Parent::__construct
+     */
+    public function testConstructor()
+    {
+        $node = new Twig_Node_Expression_Parent('foo', 1);
+
+        $this->assertEquals('foo', $node->getAttribute('name'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Parent::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+        $tests[] = array(new Twig_Node_Expression_Parent('foo', 1), '$this->renderParentBlock("foo", $context, $blocks)');
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/TestTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/TestTest.php
new file mode 100644
index 00000000..0664150a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/TestTest.php
@@ -0,0 +1,68 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_TestTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Test::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant('foo', 1);
+        $name = new Twig_Node_Expression_Constant('null', 1);
+        $args = new Twig_Node();
+        $node = new Twig_Node_Expression_Test($expr, $name, $args, 1);
+
+        $this->assertEquals($expr, $node->getNode('node'));
+        $this->assertEquals($args, $node->getNode('arguments'));
+        $this->assertEquals($name, $node->getAttribute('name'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Test::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $expr = new Twig_Node_Expression_Constant('foo', 1);
+        $node = new Twig_Node_Expression_Test_Null($expr, 'null', new Twig_Node(array()), 1);
+        $tests[] = array($node, '(null === "foo")');
+
+        // test as an anonymous function
+        if (version_compare(phpversion(), '5.3.0', '>=')) {
+            $node = $this->createTest(new Twig_Node_Expression_Constant('foo', 1), 'anonymous', array(new Twig_Node_Expression_Constant('foo', 1)));
+            $tests[] = array($node, 'call_user_func_array($this->env->getTest(\'anonymous\')->getCallable(), array("foo", "foo"))');
+        }
+
+        return $tests;
+    }
+
+    protected function createTest($node, $name, array $arguments = array())
+    {
+        return new Twig_Node_Expression_Test($node, $name, new Twig_Node($arguments), 1);
+    }
+
+    protected function getEnvironment()
+    {
+        if (version_compare(phpversion(), '5.3.0', '>=')) {
+            return include 'PHP53/TestInclude.php';
+        }
+
+        return parent::getEnvironment();
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/NegTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/NegTest.php
new file mode 100644
index 00000000..d55ab333
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/NegTest.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Unary_NegTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Unary_Neg::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant(1, 1);
+        $node = new Twig_Node_Expression_Unary_Neg($expr, 1);
+
+        $this->assertEquals($expr, $node->getNode('node'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Unary_Neg::compile
+     * @covers Twig_Node_Expression_Unary_Neg::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $node = new Twig_Node_Expression_Constant(1, 1);
+        $node = new Twig_Node_Expression_Unary_Neg($node, 1);
+
+        return array(
+            array($node, '(-1)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/NotTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/NotTest.php
new file mode 100644
index 00000000..625c2527
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/NotTest.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Unary_NotTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Unary_Not::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant(1, 1);
+        $node = new Twig_Node_Expression_Unary_Not($expr, 1);
+
+        $this->assertEquals($expr, $node->getNode('node'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Unary_Not::compile
+     * @covers Twig_Node_Expression_Unary_Not::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $node = new Twig_Node_Expression_Constant(1, 1);
+        $node = new Twig_Node_Expression_Unary_Not($node, 1);
+
+        return array(
+            array($node, '(!1)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/PosTest.php b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/PosTest.php
new file mode 100644
index 00000000..047a0977
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/Expression/Unary/PosTest.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_Expression_Unary_PosTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Expression_Unary_Pos::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant(1, 1);
+        $node = new Twig_Node_Expression_Unary_Pos($expr, 1);
+
+        $this->assertEquals($expr, $node->getNode('node'));
+    }
+
+    /**
+     * @covers Twig_Node_Expression_Unary_Pos::compile
+     * @covers Twig_Node_Expression_Unary_Pos::operator
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $node = new Twig_Node_Expression_Constant(1, 1);
+        $node = new Twig_Node_Expression_Unary_Pos($node, 1);
+
+        return array(
+            array($node, '(+1)'),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/ForTest.php b/vendor/twig/twig/test/Twig/Tests/Node/ForTest.php
new file mode 100644
index 00000000..21cc84e6
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/ForTest.php
@@ -0,0 +1,203 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_ForTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_For::__construct
+     */
+    public function testConstructor()
+    {
+        $keyTarget = new Twig_Node_Expression_AssignName('key', 1);
+        $valueTarget = new Twig_Node_Expression_AssignName('item', 1);
+        $seq = new Twig_Node_Expression_Name('items', 1);
+        $ifexpr = new Twig_Node_Expression_Constant(true, 1);
+        $body = new Twig_Node(array(new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1)), array(), 1);
+        $else = null;
+        $node = new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, 1);
+        $node->setAttribute('with_loop', false);
+
+        $this->assertEquals($keyTarget, $node->getNode('key_target'));
+        $this->assertEquals($valueTarget, $node->getNode('value_target'));
+        $this->assertEquals($seq, $node->getNode('seq'));
+        $this->assertTrue($node->getAttribute('ifexpr'));
+        $this->assertEquals('Twig_Node_If', get_class($node->getNode('body')));
+        $this->assertEquals($body, $node->getNode('body')->getNode('tests')->getNode(1)->getNode(0));
+        $this->assertEquals(null, $node->getNode('else'));
+
+        $else = new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1);
+        $node = new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, 1);
+        $node->setAttribute('with_loop', false);
+        $this->assertEquals($else, $node->getNode('else'));
+    }
+
+    /**
+     * @covers Twig_Node_For::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $keyTarget = new Twig_Node_Expression_AssignName('key', 1);
+        $valueTarget = new Twig_Node_Expression_AssignName('item', 1);
+        $seq = new Twig_Node_Expression_Name('items', 1);
+        $ifexpr = null;
+        $body = new Twig_Node(array(new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1)), array(), 1);
+        $else = null;
+        $node = new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, 1);
+        $node->setAttribute('with_loop', false);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+\$context['_parent'] = (array) \$context;
+\$context['_seq'] = twig_ensure_traversable({$this->getVariableGetter('items')});
+foreach (\$context['_seq'] as \$context["key"] => \$context["item"]) {
+    echo {$this->getVariableGetter('foo')};
+}
+\$_parent = \$context['_parent'];
+unset(\$context['_seq'], \$context['_iterated'], \$context['key'], \$context['item'], \$context['_parent'], \$context['loop']);
+\$context = array_intersect_key(\$context, \$_parent) + \$_parent;
+EOF
+        );
+
+        $keyTarget = new Twig_Node_Expression_AssignName('k', 1);
+        $valueTarget = new Twig_Node_Expression_AssignName('v', 1);
+        $seq = new Twig_Node_Expression_Name('values', 1);
+        $ifexpr = null;
+        $body = new Twig_Node(array(new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1)), array(), 1);
+        $else = null;
+        $node = new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, 1);
+        $node->setAttribute('with_loop', true);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+\$context['_parent'] = (array) \$context;
+\$context['_seq'] = twig_ensure_traversable({$this->getVariableGetter('values')});
+\$context['loop'] = array(
+  'parent' => \$context['_parent'],
+  'index0' => 0,
+  'index'  => 1,
+  'first'  => true,
+);
+if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {
+    \$length = count(\$context['_seq']);
+    \$context['loop']['revindex0'] = \$length - 1;
+    \$context['loop']['revindex'] = \$length;
+    \$context['loop']['length'] = \$length;
+    \$context['loop']['last'] = 1 === \$length;
+}
+foreach (\$context['_seq'] as \$context["k"] => \$context["v"]) {
+    echo {$this->getVariableGetter('foo')};
+    ++\$context['loop']['index0'];
+    ++\$context['loop']['index'];
+    \$context['loop']['first'] = false;
+    if (isset(\$context['loop']['length'])) {
+        --\$context['loop']['revindex0'];
+        --\$context['loop']['revindex'];
+        \$context['loop']['last'] = 0 === \$context['loop']['revindex0'];
+    }
+}
+\$_parent = \$context['_parent'];
+unset(\$context['_seq'], \$context['_iterated'], \$context['k'], \$context['v'], \$context['_parent'], \$context['loop']);
+\$context = array_intersect_key(\$context, \$_parent) + \$_parent;
+EOF
+        );
+
+        $keyTarget = new Twig_Node_Expression_AssignName('k', 1);
+        $valueTarget = new Twig_Node_Expression_AssignName('v', 1);
+        $seq = new Twig_Node_Expression_Name('values', 1);
+        $ifexpr = new Twig_Node_Expression_Constant(true, 1);
+        $body = new Twig_Node(array(new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1)), array(), 1);
+        $else = null;
+        $node = new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, 1);
+        $node->setAttribute('with_loop', true);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+\$context['_parent'] = (array) \$context;
+\$context['_seq'] = twig_ensure_traversable({$this->getVariableGetter('values')});
+\$context['loop'] = array(
+  'parent' => \$context['_parent'],
+  'index0' => 0,
+  'index'  => 1,
+  'first'  => true,
+);
+foreach (\$context['_seq'] as \$context["k"] => \$context["v"]) {
+    if (true) {
+        echo {$this->getVariableGetter('foo')};
+        ++\$context['loop']['index0'];
+        ++\$context['loop']['index'];
+        \$context['loop']['first'] = false;
+    }
+}
+\$_parent = \$context['_parent'];
+unset(\$context['_seq'], \$context['_iterated'], \$context['k'], \$context['v'], \$context['_parent'], \$context['loop']);
+\$context = array_intersect_key(\$context, \$_parent) + \$_parent;
+EOF
+        );
+
+        $keyTarget = new Twig_Node_Expression_AssignName('k', 1);
+        $valueTarget = new Twig_Node_Expression_AssignName('v', 1);
+        $seq = new Twig_Node_Expression_Name('values', 1);
+        $ifexpr = null;
+        $body = new Twig_Node(array(new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1)), array(), 1);
+        $else = new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1);
+        $node = new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, 1);
+        $node->setAttribute('with_loop', true);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+\$context['_parent'] = (array) \$context;
+\$context['_seq'] = twig_ensure_traversable({$this->getVariableGetter('values')});
+\$context['_iterated'] = false;
+\$context['loop'] = array(
+  'parent' => \$context['_parent'],
+  'index0' => 0,
+  'index'  => 1,
+  'first'  => true,
+);
+if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {
+    \$length = count(\$context['_seq']);
+    \$context['loop']['revindex0'] = \$length - 1;
+    \$context['loop']['revindex'] = \$length;
+    \$context['loop']['length'] = \$length;
+    \$context['loop']['last'] = 1 === \$length;
+}
+foreach (\$context['_seq'] as \$context["k"] => \$context["v"]) {
+    echo {$this->getVariableGetter('foo')};
+    \$context['_iterated'] = true;
+    ++\$context['loop']['index0'];
+    ++\$context['loop']['index'];
+    \$context['loop']['first'] = false;
+    if (isset(\$context['loop']['length'])) {
+        --\$context['loop']['revindex0'];
+        --\$context['loop']['revindex'];
+        \$context['loop']['last'] = 0 === \$context['loop']['revindex0'];
+    }
+}
+if (!\$context['_iterated']) {
+    echo {$this->getVariableGetter('foo')};
+}
+\$_parent = \$context['_parent'];
+unset(\$context['_seq'], \$context['_iterated'], \$context['k'], \$context['v'], \$context['_parent'], \$context['loop']);
+\$context = array_intersect_key(\$context, \$_parent) + \$_parent;
+EOF
+        );
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/IfTest.php b/vendor/twig/twig/test/Twig/Tests/Node/IfTest.php
new file mode 100644
index 00000000..92fc29dc
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/IfTest.php
@@ -0,0 +1,100 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_IfTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_If::__construct
+     */
+    public function testConstructor()
+    {
+        $t = new Twig_Node(array(
+            new Twig_Node_Expression_Constant(true, 1),
+            new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1),
+        ), array(), 1);
+        $else = null;
+        $node = new Twig_Node_If($t, $else, 1);
+
+        $this->assertEquals($t, $node->getNode('tests'));
+        $this->assertEquals(null, $node->getNode('else'));
+
+        $else = new Twig_Node_Print(new Twig_Node_Expression_Name('bar', 1), 1);
+        $node = new Twig_Node_If($t, $else, 1);
+        $this->assertEquals($else, $node->getNode('else'));
+    }
+
+    /**
+     * @covers Twig_Node_If::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $t = new Twig_Node(array(
+            new Twig_Node_Expression_Constant(true, 1),
+            new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1),
+        ), array(), 1);
+        $else = null;
+        $node = new Twig_Node_If($t, $else, 1);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+if (true) {
+    echo {$this->getVariableGetter('foo')};
+}
+EOF
+        );
+
+        $t = new Twig_Node(array(
+            new Twig_Node_Expression_Constant(true, 1),
+            new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1),
+            new Twig_Node_Expression_Constant(false, 1),
+            new Twig_Node_Print(new Twig_Node_Expression_Name('bar', 1), 1),
+        ), array(), 1);
+        $else = null;
+        $node = new Twig_Node_If($t, $else, 1);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+if (true) {
+    echo {$this->getVariableGetter('foo')};
+} elseif (false) {
+    echo {$this->getVariableGetter('bar')};
+}
+EOF
+        );
+
+        $t = new Twig_Node(array(
+            new Twig_Node_Expression_Constant(true, 1),
+            new Twig_Node_Print(new Twig_Node_Expression_Name('foo', 1), 1),
+        ), array(), 1);
+        $else = new Twig_Node_Print(new Twig_Node_Expression_Name('bar', 1), 1);
+        $node = new Twig_Node_If($t, $else, 1);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+if (true) {
+    echo {$this->getVariableGetter('foo')};
+} else {
+    echo {$this->getVariableGetter('bar')};
+}
+EOF
+        );
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/ImportTest.php b/vendor/twig/twig/test/Twig/Tests/Node/ImportTest.php
new file mode 100644
index 00000000..db36581a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/ImportTest.php
@@ -0,0 +1,52 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_ImportTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Import::__construct
+     */
+    public function testConstructor()
+    {
+        $macro = new Twig_Node_Expression_Constant('foo.twig', 1);
+        $var = new Twig_Node_Expression_AssignName('macro', 1);
+        $node = new Twig_Node_Import($macro, $var, 1);
+
+        $this->assertEquals($macro, $node->getNode('expr'));
+        $this->assertEquals($var, $node->getNode('var'));
+    }
+
+    /**
+     * @covers Twig_Node_Import::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $macro = new Twig_Node_Expression_Constant('foo.twig', 1);
+        $var = new Twig_Node_Expression_AssignName('macro', 1);
+        $node = new Twig_Node_Import($macro, $var, 1);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+\$context["macro"] = \$this->env->loadTemplate("foo.twig");
+EOF
+        );
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/IncludeTest.php b/vendor/twig/twig/test/Twig/Tests/Node/IncludeTest.php
new file mode 100644
index 00000000..3b7da6e0
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/IncludeTest.php
@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_IncludeTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Include::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant('foo.twig', 1);
+        $node = new Twig_Node_Include($expr, null, false, false, 1);
+
+        $this->assertEquals(null, $node->getNode('variables'));
+        $this->assertEquals($expr, $node->getNode('expr'));
+        $this->assertFalse($node->getAttribute('only'));
+
+        $vars = new Twig_Node_Expression_Array(array(new Twig_Node_Expression_Constant('foo', 1), new Twig_Node_Expression_Constant(true, 1)), 1);
+        $node = new Twig_Node_Include($expr, $vars, true, false, 1);
+        $this->assertEquals($vars, $node->getNode('variables'));
+        $this->assertTrue($node->getAttribute('only'));
+    }
+
+    /**
+     * @covers Twig_Node_Include::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $expr = new Twig_Node_Expression_Constant('foo.twig', 1);
+        $node = new Twig_Node_Include($expr, null, false, false, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+\$this->env->loadTemplate("foo.twig")->display(\$context);
+EOF
+        );
+
+        $expr = new Twig_Node_Expression_Conditional(
+                        new Twig_Node_Expression_Constant(true, 1),
+                        new Twig_Node_Expression_Constant('foo', 1),
+                        new Twig_Node_Expression_Constant('foo', 1),
+                        0
+                    );
+        $node = new Twig_Node_Include($expr, null, false, false, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+\$template = \$this->env->resolveTemplate(((true) ? ("foo") : ("foo")));
+\$template->display(\$context);
+EOF
+        );
+
+        $expr = new Twig_Node_Expression_Constant('foo.twig', 1);
+        $vars = new Twig_Node_Expression_Array(array(new Twig_Node_Expression_Constant('foo', 1), new Twig_Node_Expression_Constant(true, 1)), 1);
+        $node = new Twig_Node_Include($expr, $vars, false, false, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+\$this->env->loadTemplate("foo.twig")->display(array_merge(\$context, array("foo" => true)));
+EOF
+        );
+
+        $node = new Twig_Node_Include($expr, $vars, true, false, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+\$this->env->loadTemplate("foo.twig")->display(array("foo" => true));
+EOF
+        );
+
+        $node = new Twig_Node_Include($expr, $vars, true, true, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+try {
+    \$this->env->loadTemplate("foo.twig")->display(array("foo" => true));
+} catch (Twig_Error_Loader \$e) {
+    // ignore missing template
+}
+EOF
+        );
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/MacroTest.php b/vendor/twig/twig/test/Twig/Tests/Node/MacroTest.php
new file mode 100644
index 00000000..4d2f641b
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/MacroTest.php
@@ -0,0 +1,73 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_MacroTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Macro::__construct
+     */
+    public function testConstructor()
+    {
+        $body = new Twig_Node_Text('foo', 1);
+        $arguments = new Twig_Node(array(new Twig_Node_Expression_Name('foo', 1)), array(), 1);
+        $node = new Twig_Node_Macro('foo', $body, $arguments, 1);
+
+        $this->assertEquals($body, $node->getNode('body'));
+        $this->assertEquals($arguments, $node->getNode('arguments'));
+        $this->assertEquals('foo', $node->getAttribute('name'));
+    }
+
+    /**
+     * @covers Twig_Node_Macro::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $body = new Twig_Node_Text('foo', 1);
+        $arguments = new Twig_Node(array(
+            'foo' => new Twig_Node_Expression_Constant(null, 1),
+            'bar' => new Twig_Node_Expression_Constant('Foo', 1),
+        ), array(), 1);
+        $node = new Twig_Node_Macro('foo', $body, $arguments, 1);
+
+        return array(
+            array($node, <<<EOF
+// line 1
+public function getfoo(\$_foo = null, \$_bar = "Foo")
+{
+    \$context = \$this->env->mergeGlobals(array(
+        "foo" => \$_foo,
+        "bar" => \$_bar,
+    ));
+
+    \$blocks = array();
+
+    ob_start();
+    try {
+        echo "foo";
+    } catch (Exception \$e) {
+        ob_end_clean();
+
+        throw \$e;
+    }
+
+    return ('' === \$tmp = ob_get_clean()) ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset());
+}
+EOF
+            ),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/ModuleTest.php b/vendor/twig/twig/test/Twig/Tests/Node/ModuleTest.php
new file mode 100644
index 00000000..9411e99e
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/ModuleTest.php
@@ -0,0 +1,196 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_ModuleTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Module::__construct
+     */
+    public function testConstructor()
+    {
+        $body = new Twig_Node_Text('foo', 1);
+        $parent = new Twig_Node_Expression_Constant('layout.twig', 1);
+        $blocks = new Twig_Node();
+        $macros = new Twig_Node();
+        $traits = new Twig_Node();
+        $filename = 'foo.twig';
+        $node = new Twig_Node_Module($body, $parent, $blocks, $macros, $traits, new Twig_Node(array()), $filename);
+
+        $this->assertEquals($body, $node->getNode('body'));
+        $this->assertEquals($blocks, $node->getNode('blocks'));
+        $this->assertEquals($macros, $node->getNode('macros'));
+        $this->assertEquals($parent, $node->getNode('parent'));
+        $this->assertEquals($filename, $node->getAttribute('filename'));
+    }
+
+    /**
+     * @covers Twig_Node_Module::compile
+     * @covers Twig_Node_Module::compileTemplate
+     * @covers Twig_Node_Module::compileMacros
+     * @covers Twig_Node_Module::compileClassHeader
+     * @covers Twig_Node_Module::compileDisplayHeader
+     * @covers Twig_Node_Module::compileDisplayBody
+     * @covers Twig_Node_Module::compileDisplayFooter
+     * @covers Twig_Node_Module::compileClassFooter
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $twig = new Twig_Environment(new Twig_Loader_String());
+
+        $tests = array();
+
+        $body = new Twig_Node_Text('foo', 1);
+        $extends = null;
+        $blocks = new Twig_Node();
+        $macros = new Twig_Node();
+        $traits = new Twig_Node();
+        $filename = 'foo.twig';
+
+        $node = new Twig_Node_Module($body, $extends, $blocks, $macros, $traits, new Twig_Node(array()), $filename);
+        $tests[] = array($node, <<<EOF
+<?php
+
+/* foo.twig */
+class __TwigTemplate_be925a7b06dda0dfdbd18a1509f7eb34 extends Twig_Template
+{
+    public function __construct(Twig_Environment \$env)
+    {
+        parent::__construct(\$env);
+
+        \$this->parent = false;
+
+        \$this->blocks = array(
+        );
+    }
+
+    protected function doDisplay(array \$context, array \$blocks = array())
+    {
+        // line 1
+        echo "foo";
+    }
+
+    public function getTemplateName()
+    {
+        return "foo.twig";
+    }
+
+    public function getDebugInfo()
+    {
+        return array (  19 => 1,);
+    }
+}
+EOF
+        , $twig);
+
+        $import = new Twig_Node_Import(new Twig_Node_Expression_Constant('foo.twig', 1), new Twig_Node_Expression_AssignName('macro', 1), 1);
+
+        $body = new Twig_Node(array($import));
+        $extends = new Twig_Node_Expression_Constant('layout.twig', 1);
+
+        $node = new Twig_Node_Module($body, $extends, $blocks, $macros, $traits, new Twig_Node(array()), $filename);
+        $tests[] = array($node, <<<EOF
+<?php
+
+/* foo.twig */
+class __TwigTemplate_be925a7b06dda0dfdbd18a1509f7eb34 extends Twig_Template
+{
+    public function __construct(Twig_Environment \$env)
+    {
+        parent::__construct(\$env);
+
+        \$this->parent = \$this->env->loadTemplate("layout.twig");
+
+        \$this->blocks = array(
+        );
+    }
+
+    protected function doGetParent(array \$context)
+    {
+        return "layout.twig";
+    }
+
+    protected function doDisplay(array \$context, array \$blocks = array())
+    {
+        // line 1
+        \$context["macro"] = \$this->env->loadTemplate("foo.twig");
+        \$this->parent->display(\$context, array_merge(\$this->blocks, \$blocks));
+    }
+
+    public function getTemplateName()
+    {
+        return "foo.twig";
+    }
+
+    public function isTraitable()
+    {
+        return false;
+    }
+
+    public function getDebugInfo()
+    {
+        return array (  24 => 1,);
+    }
+}
+EOF
+        , $twig);
+
+        $body = new Twig_Node();
+        $extends = new Twig_Node_Expression_Conditional(
+                        new Twig_Node_Expression_Constant(true, 1),
+                        new Twig_Node_Expression_Constant('foo', 1),
+                        new Twig_Node_Expression_Constant('foo', 1),
+                        0
+                    );
+
+        $node = new Twig_Node_Module($body, $extends, $blocks, $macros, $traits, new Twig_Node(array()), $filename);
+        $tests[] = array($node, <<<EOF
+<?php
+
+/* foo.twig */
+class __TwigTemplate_be925a7b06dda0dfdbd18a1509f7eb34 extends Twig_Template
+{
+    protected function doGetParent(array \$context)
+    {
+        return \$this->env->resolveTemplate(((true) ? ("foo") : ("foo")));
+    }
+
+    protected function doDisplay(array \$context, array \$blocks = array())
+    {
+        \$this->getParent(\$context)->display(\$context, array_merge(\$this->blocks, \$blocks));
+    }
+
+    public function getTemplateName()
+    {
+        return "foo.twig";
+    }
+
+    public function isTraitable()
+    {
+        return false;
+    }
+
+    public function getDebugInfo()
+    {
+        return array ();
+    }
+}
+EOF
+        , $twig);
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/PrintTest.php b/vendor/twig/twig/test/Twig/Tests/Node/PrintTest.php
new file mode 100644
index 00000000..6fe43a41
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/PrintTest.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_PrintTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Print::__construct
+     */
+    public function testConstructor()
+    {
+        $expr = new Twig_Node_Expression_Constant('foo', 1);
+        $node = new Twig_Node_Print($expr, 1);
+
+        $this->assertEquals($expr, $node->getNode('expr'));
+    }
+
+    /**
+     * @covers Twig_Node_Print::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+        $tests[] = array(new Twig_Node_Print(new Twig_Node_Expression_Constant('foo', 1), 1), "// line 1\necho \"foo\";");
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/SandboxTest.php b/vendor/twig/twig/test/Twig/Tests/Node/SandboxTest.php
new file mode 100644
index 00000000..db9dbf95
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/SandboxTest.php
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_SandboxTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Sandbox::__construct
+     */
+    public function testConstructor()
+    {
+        $body = new Twig_Node_Text('foo', 1);
+        $node = new Twig_Node_Sandbox($body, 1);
+
+        $this->assertEquals($body, $node->getNode('body'));
+    }
+
+    /**
+     * @covers Twig_Node_Sandbox::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $body = new Twig_Node_Text('foo', 1);
+        $node = new Twig_Node_Sandbox($body, 1);
+
+        $tests[] = array($node, <<<EOF
+// line 1
+\$sandbox = \$this->env->getExtension('sandbox');
+if (!\$alreadySandboxed = \$sandbox->isSandboxed()) {
+    \$sandbox->enableSandbox();
+}
+echo "foo";
+if (!\$alreadySandboxed) {
+    \$sandbox->disableSandbox();
+}
+EOF
+        );
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/SandboxedModuleTest.php b/vendor/twig/twig/test/Twig/Tests/Node/SandboxedModuleTest.php
new file mode 100644
index 00000000..217e3408
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/SandboxedModuleTest.php
@@ -0,0 +1,173 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_SandboxedModuleTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_SandboxedModule::__construct
+     */
+    public function testConstructor()
+    {
+        $body = new Twig_Node_Text('foo', 1);
+        $parent = new Twig_Node_Expression_Constant('layout.twig', 1);
+        $blocks = new Twig_Node();
+        $macros = new Twig_Node();
+        $traits = new Twig_Node();
+        $filename = 'foo.twig';
+        $node = new Twig_Node_Module($body, $parent, $blocks, $macros, $traits, new Twig_Node(array()), $filename);
+        $node = new Twig_Node_SandboxedModule($node, array('for'), array('upper'), array('cycle'));
+
+        $this->assertEquals($body, $node->getNode('body'));
+        $this->assertEquals($blocks, $node->getNode('blocks'));
+        $this->assertEquals($macros, $node->getNode('macros'));
+        $this->assertEquals($parent, $node->getNode('parent'));
+        $this->assertEquals($filename, $node->getAttribute('filename'));
+    }
+
+    /**
+     * @covers Twig_Node_SandboxedModule::compile
+     * @covers Twig_Node_SandboxedModule::compileDisplayBody
+     * @covers Twig_Node_SandboxedModule::compileDisplayFooter
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $twig = new Twig_Environment(new Twig_Loader_String());
+
+        $tests = array();
+
+        $body = new Twig_Node_Text('foo', 1);
+        $extends = null;
+        $blocks = new Twig_Node();
+        $macros = new Twig_Node();
+        $traits = new Twig_Node();
+        $filename = 'foo.twig';
+
+        $node = new Twig_Node_Module($body, $extends, $blocks, $macros, $traits, new Twig_Node(array()), $filename);
+        $node = new Twig_Node_SandboxedModule($node, array('for'), array('upper'), array('cycle'));
+
+        $tests[] = array($node, <<<EOF
+<?php
+
+/* foo.twig */
+class __TwigTemplate_be925a7b06dda0dfdbd18a1509f7eb34 extends Twig_Template
+{
+    public function __construct(Twig_Environment \$env)
+    {
+        parent::__construct(\$env);
+
+        \$this->parent = false;
+
+        \$this->blocks = array(
+        );
+    }
+
+    protected function doDisplay(array \$context, array \$blocks = array())
+    {
+        \$this->checkSecurity();
+        // line 1
+        echo "foo";
+    }
+
+    protected function checkSecurity()
+    {
+        \$this->env->getExtension('sandbox')->checkSecurity(
+            array('upper'),
+            array('for'),
+            array('cycle')
+        );
+    }
+
+    public function getTemplateName()
+    {
+        return "foo.twig";
+    }
+
+    public function getDebugInfo()
+    {
+        return array (  20 => 1,);
+    }
+}
+EOF
+        , $twig);
+
+        $body = new Twig_Node();
+        $extends = new Twig_Node_Expression_Constant('layout.twig', 1);
+        $blocks = new Twig_Node();
+        $macros = new Twig_Node();
+        $traits = new Twig_Node();
+        $filename = 'foo.twig';
+
+        $node = new Twig_Node_Module($body, $extends, $blocks, $macros, $traits, new Twig_Node(array()), $filename);
+        $node = new Twig_Node_SandboxedModule($node, array('for'), array('upper'), array('cycle'));
+
+        $tests[] = array($node, <<<EOF
+<?php
+
+/* foo.twig */
+class __TwigTemplate_be925a7b06dda0dfdbd18a1509f7eb34 extends Twig_Template
+{
+    public function __construct(Twig_Environment \$env)
+    {
+        parent::__construct(\$env);
+
+        \$this->parent = \$this->env->loadTemplate("layout.twig");
+
+        \$this->blocks = array(
+        );
+    }
+
+    protected function doGetParent(array \$context)
+    {
+        return "layout.twig";
+    }
+
+    protected function doDisplay(array \$context, array \$blocks = array())
+    {
+        \$this->checkSecurity();
+        \$this->parent->display(\$context, array_merge(\$this->blocks, \$blocks));
+    }
+
+    protected function checkSecurity()
+    {
+        \$this->env->getExtension('sandbox')->checkSecurity(
+            array('upper'),
+            array('for'),
+            array('cycle')
+        );
+    }
+
+    public function getTemplateName()
+    {
+        return "foo.twig";
+    }
+
+    public function isTraitable()
+    {
+        return false;
+    }
+
+    public function getDebugInfo()
+    {
+        return array ();
+    }
+}
+EOF
+        , $twig);
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/SandboxedPrintTest.php b/vendor/twig/twig/test/Twig/Tests/Node/SandboxedPrintTest.php
new file mode 100644
index 00000000..058e02bc
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/SandboxedPrintTest.php
@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_SandboxedPrintTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_SandboxedPrint::__construct
+     */
+    public function testConstructor()
+    {
+        $node = new Twig_Node_SandboxedPrint($expr = new Twig_Node_Expression_Constant('foo', 1), 1);
+
+        $this->assertEquals($expr, $node->getNode('expr'));
+    }
+
+    /**
+     * @covers Twig_Node_SandboxedPrint::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $tests[] = array(new Twig_Node_SandboxedPrint(new Twig_Node_Expression_Constant('foo', 1), 1), <<<EOF
+// line 1
+echo \$this->env->getExtension('sandbox')->ensureToStringAllowed("foo");
+EOF
+        );
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/SetTest.php b/vendor/twig/twig/test/Twig/Tests/Node/SetTest.php
new file mode 100644
index 00000000..d64d671a
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/SetTest.php
@@ -0,0 +1,81 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_SetTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Set::__construct
+     */
+    public function testConstructor()
+    {
+        $names = new Twig_Node(array(new Twig_Node_Expression_AssignName('foo', 1)), array(), 1);
+        $values = new Twig_Node(array(new Twig_Node_Expression_Constant('foo', 1)), array(), 1);
+        $node = new Twig_Node_Set(false, $names, $values, 1);
+
+        $this->assertEquals($names, $node->getNode('names'));
+        $this->assertEquals($values, $node->getNode('values'));
+        $this->assertEquals(false, $node->getAttribute('capture'));
+    }
+
+    /**
+     * @covers Twig_Node_Set::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+
+        $names = new Twig_Node(array(new Twig_Node_Expression_AssignName('foo', 1)), array(), 1);
+        $values = new Twig_Node(array(new Twig_Node_Expression_Constant('foo', 1)), array(), 1);
+        $node = new Twig_Node_Set(false, $names, $values, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+\$context["foo"] = "foo";
+EOF
+        );
+
+        $names = new Twig_Node(array(new Twig_Node_Expression_AssignName('foo', 1)), array(), 1);
+        $values = new Twig_Node(array(new Twig_Node_Print(new Twig_Node_Expression_Constant('foo', 1), 1)), array(), 1);
+        $node = new Twig_Node_Set(true, $names, $values, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+ob_start();
+echo "foo";
+\$context["foo"] = ('' === \$tmp = ob_get_clean()) ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset());
+EOF
+        );
+
+        $names = new Twig_Node(array(new Twig_Node_Expression_AssignName('foo', 1)), array(), 1);
+        $values = new Twig_Node_Text('foo', 1);
+        $node = new Twig_Node_Set(true, $names, $values, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+\$context["foo"] = ('' === \$tmp = "foo") ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset());
+EOF
+        );
+
+        $names = new Twig_Node(array(new Twig_Node_Expression_AssignName('foo', 1), new Twig_Node_Expression_AssignName('bar', 1)), array(), 1);
+        $values = new Twig_Node(array(new Twig_Node_Expression_Constant('foo', 1), new Twig_Node_Expression_Name('bar', 1)), array(), 1);
+        $node = new Twig_Node_Set(false, $names, $values, 1);
+        $tests[] = array($node, <<<EOF
+// line 1
+list(\$context["foo"], \$context["bar"]) = array("foo", {$this->getVariableGetter('bar')});
+EOF
+        );
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/SpacelessTest.php b/vendor/twig/twig/test/Twig/Tests/Node/SpacelessTest.php
new file mode 100644
index 00000000..6735dc31
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/SpacelessTest.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_SpacelessTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Spaceless::__construct
+     */
+    public function testConstructor()
+    {
+        $body = new Twig_Node(array(new Twig_Node_Text('<div>   <div>   foo   </div>   </div>', 1)));
+        $node = new Twig_Node_Spaceless($body, 1);
+
+        $this->assertEquals($body, $node->getNode('body'));
+    }
+
+    /**
+     * @covers Twig_Node_Spaceless::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $body = new Twig_Node(array(new Twig_Node_Text('<div>   <div>   foo   </div>   </div>', 1)));
+        $node = new Twig_Node_Spaceless($body, 1);
+
+        return array(
+            array($node, <<<EOF
+// line 1
+ob_start();
+echo "<div>   <div>   foo   </div>   </div>";
+echo trim(preg_replace('/>\s+</', '><', ob_get_clean()));
+EOF
+            ),
+        );
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/Node/TextTest.php b/vendor/twig/twig/test/Twig/Tests/Node/TextTest.php
new file mode 100644
index 00000000..6f85576e
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/Node/TextTest.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_Node_TextTest extends Twig_Test_NodeTestCase
+{
+    /**
+     * @covers Twig_Node_Text::__construct
+     */
+    public function testConstructor()
+    {
+        $node = new Twig_Node_Text('foo', 1);
+
+        $this->assertEquals('foo', $node->getAttribute('data'));
+    }
+
+    /**
+     * @covers Twig_Node_Text::compile
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null)
+    {
+        parent::testCompile($node, $source, $environment);
+    }
+
+    public function getTests()
+    {
+        $tests = array();
+        $tests[] = array(new Twig_Node_Text('foo', 1), "// line 1\necho \"foo\";");
+
+        return $tests;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/NodeVisitor/OptimizerTest.php b/vendor/twig/twig/test/Twig/Tests/NodeVisitor/OptimizerTest.php
new file mode 100644
index 00000000..d35740d5
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/NodeVisitor/OptimizerTest.php
@@ -0,0 +1,114 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Tests_NodeVisitor_OptimizerTest extends PHPUnit_Framework_TestCase
+{
+    public function testRenderBlockOptimizer()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+
+        $stream = $env->parse($env->tokenize('{{ block("foo") }}', 'index'));
+
+        $node = $stream->getNode('body')->getNode(0);
+
+        $this->assertEquals('Twig_Node_Expression_BlockReference', get_class($node));
+        $this->assertTrue($node->getAttribute('output'));
+    }
+
+    public function testRenderParentBlockOptimizer()
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+
+        $stream = $env->parse($env->tokenize('{% extends "foo" %}{% block content %}{{ parent() }}{% endblock %}', 'index'));
+
+        $node = $stream->getNode('blocks')->getNode('content')->getNode(0)->getNode('body');
+
+        $this->assertEquals('Twig_Node_Expression_Parent', get_class($node));
+        $this->assertTrue($node->getAttribute('output'));
+    }
+
+    public function testRenderVariableBlockOptimizer()
+    {
+        if (version_compare(phpversion(), '5.4.0RC1', '>=')) {
+            return;
+        }
+
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false, 'autoescape' => false));
+        $stream = $env->parse($env->tokenize('{{ block(name|lower) }}', 'index'));
+
+        $node = $stream->getNode('body')->getNode(0)->getNode(1);
+
+        $this->assertEquals('Twig_Node_Expression_BlockReference', get_class($node));
+        $this->assertTrue($node->getAttribute('output'));
+    }
+
+    /**
+     * @dataProvider getTestsForForOptimizer
+     */
+    public function testForOptimizer($template, $expected)
+    {
+        $env = new Twig_Environment(new Twig_Loader_String(), array('cache' => false));
+
+        $stream = $env->parse($env->tokenize($template, 'index'));
+
+        foreach ($expected as $target => $withLoop) {
+            $this->assertTrue($this->checkForConfiguration($stream, $target, $withLoop), sprintf('variable %s is %soptimized', $target, $withLoop ? 'not ' : ''));
+        }
+    }
+
+    public function getTestsForForOptimizer()
+    {
+        return array(
+            array('{% for i in foo %}{% endfor %}', array('i' => false)),
+
+            array('{% for i in foo %}{{ loop.index }}{% endfor %}', array('i' => true)),
+
+            array('{% for i in foo %}{% for j in foo %}{% endfor %}{% endfor %}', array('i' => false, 'j' => false)),
+
+            array('{% for i in foo %}{% include "foo" %}{% endfor %}', array('i' => true)),
+
+            array('{% for i in foo %}{% include "foo" only %}{% endfor %}', array('i' => false)),
+
+            array('{% for i in foo %}{% include "foo" with { "foo": "bar" } only %}{% endfor %}', array('i' => false)),
+
+            array('{% for i in foo %}{% include "foo" with { "foo": loop.index } only %}{% endfor %}', array('i' => true)),
+
+            array('{% for i in foo %}{% for j in foo %}{{ loop.index }}{% endfor %}{% endfor %}', array('i' => false, 'j' => true)),
+
+            array('{% for i in foo %}{% for j in foo %}{{ loop.parent.loop.index }}{% endfor %}{% endfor %}', array('i' => true, 'j' => true)),
+
+            array('{% for i in foo %}{% set l = loop %}{% for j in foo %}{{ l.index }}{% endfor %}{% endfor %}', array('i' => true, 'j' => false)),
+
+            array('{% for i in foo %}{% for j in foo %}{{ foo.parent.loop.index }}{% endfor %}{% endfor %}', array('i' => false, 'j' => false)),
+
+            array('{% for i in foo %}{% for j in foo %}{{ loop["parent"].loop.index }}{% endfor %}{% endfor %}', array('i' => true, 'j' => true)),
+        );
+    }
+
+    public function checkForConfiguration(Twig_NodeInterface $node = null, $target, $withLoop)
+    {
+        if (null === $node) {
+            return;
+        }
+
+        foreach ($node as $n) {
+            if ($n instanceof Twig_Node_For) {
+                if ($target === $n->getNode('value_target')->getAttribute('name')) {
+                    return $withLoop == $n->getAttribute('with_loop');
+                }
+            }
+
+            $ret = $this->checkForConfiguration($n, $target, $withLoop);
+            if (null !== $ret) {
+                return $ret;
+            }
+        }
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/ParserTest.php b/vendor/twig/twig/test/Twig/Tests/ParserTest.php
new file mode 100644
index 00000000..55eb7fb4
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/ParserTest.php
@@ -0,0 +1,180 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Tests_ParserTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @expectedException Twig_Error_Syntax
+     */
+    public function testSetMacroThrowsExceptionOnReservedMethods()
+    {
+        $parser = $this->getParser();
+        $parser->setMacro('display', $this->getMock('Twig_Node_Macro', array(), array(), '', null));
+    }
+
+    /**
+     * @expectedException        Twig_Error_Syntax
+     * @expectedExceptionMessage Unknown tag name "foo". Did you mean "for" at line 1
+     */
+    public function testUnknownTag()
+    {
+        $stream = new Twig_TokenStream(array(
+            new Twig_Token(Twig_Token::BLOCK_START_TYPE, '', 1),
+            new Twig_Token(Twig_Token::NAME_TYPE, 'foo', 1),
+            new Twig_Token(Twig_Token::BLOCK_END_TYPE, '', 1),
+            new Twig_Token(Twig_Token::EOF_TYPE, '', 1),
+        ));
+        $parser = new Twig_Parser(new Twig_Environment());
+        $parser->parse($stream);
+    }
+
+    /**
+     * @dataProvider getFilterBodyNodesData
+     */
+    public function testFilterBodyNodes($input, $expected)
+    {
+        $parser = $this->getParser();
+
+        $this->assertEquals($expected, $parser->filterBodyNodes($input));
+    }
+
+    public function getFilterBodyNodesData()
+    {
+        return array(
+            array(
+                new Twig_Node(array(new Twig_Node_Text('   ', 1))),
+                new Twig_Node(array()),
+            ),
+            array(
+                $input = new Twig_Node(array(new Twig_Node_Set(false, new Twig_Node(), new Twig_Node(), 1))),
+                $input,
+            ),
+            array(
+                $input = new Twig_Node(array(new Twig_Node_Set(true, new Twig_Node(), new Twig_Node(array(new Twig_Node(array(new Twig_Node_Text('foo', 1))))), 1))),
+                $input,
+            ),
+        );
+    }
+
+    /**
+     * @dataProvider getFilterBodyNodesDataThrowsException
+     * @expectedException Twig_Error_Syntax
+     */
+    public function testFilterBodyNodesThrowsException($input)
+    {
+        $parser = $this->getParser();
+
+        $parser->filterBodyNodes($input);
+    }
+
+    public function getFilterBodyNodesDataThrowsException()
+    {
+        return array(
+            array(new Twig_Node_Text('foo', 1)),
+            array(new Twig_Node(array(new Twig_Node(array(new Twig_Node_Text('foo', 1)))))),
+        );
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @expectedExceptionMessage A template that extends another one cannot have a body but a byte order mark (BOM) has been detected; it must be removed at line 1.
+     */
+    public function testFilterBodyNodesWithBOM()
+    {
+        $parser = $this->getParser();
+        $parser->filterBodyNodes(new Twig_Node_Text(chr(0xEF).chr(0xBB).chr(0xBF), 1));
+    }
+
+    public function testParseIsReentrant()
+    {
+        $twig = new Twig_Environment(null, array(
+            'autoescape' => false,
+            'optimizations' => 0,
+        ));
+        $twig->addTokenParser(new TestTokenParser());
+
+        $parser = new Twig_Parser($twig);
+
+        $parser->parse(new Twig_TokenStream(array(
+            new Twig_Token(Twig_Token::BLOCK_START_TYPE, '', 1),
+            new Twig_Token(Twig_Token::NAME_TYPE, 'test', 1),
+            new Twig_Token(Twig_Token::BLOCK_END_TYPE, '', 1),
+            new Twig_Token(Twig_Token::VAR_START_TYPE, '', 1),
+            new Twig_Token(Twig_Token::NAME_TYPE, 'foo', 1),
+            new Twig_Token(Twig_Token::VAR_END_TYPE, '', 1),
+            new Twig_Token(Twig_Token::EOF_TYPE, '', 1),
+        )));
+
+        $this->assertEquals(null, $parser->getParent());
+    }
+
+    // The getVarName() must not depend on the template loaders,
+    // If this test does not throw any exception, that's good.
+    // see https://github.com/symfony/symfony/issues/4218
+    public function testGetVarName()
+    {
+        $twig = new Twig_Environment(null, array(
+            'autoescape' => false,
+            'optimizations' => 0,
+        ));
+
+        $twig->parse($twig->tokenize(<<<EOF
+{% from _self import foo %}
+
+{% macro foo() %}
+    {{ foo }}
+{% endmacro %}
+EOF
+        ));
+    }
+
+    protected function getParser()
+    {
+        $parser = new TestParser(new Twig_Environment());
+        $parser->setParent(new Twig_Node());
+        $parser->stream = $this->getMockBuilder('Twig_TokenStream')->disableOriginalConstructor()->getMock();
+
+        return $parser;
+    }
+}
+
+class TestParser extends Twig_Parser
+{
+    public $stream;
+
+    public function filterBodyNodes(Twig_NodeInterface $node)
+    {
+        return parent::filterBodyNodes($node);
+    }
+}
+
+class TestTokenParser extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        // simulate the parsing of another template right in the middle of the parsing of the current template
+        $this->parser->parse(new Twig_TokenStream(array(
+            new Twig_Token(Twig_Token::BLOCK_START_TYPE, '', 1),
+            new Twig_Token(Twig_Token::NAME_TYPE, 'extends', 1),
+            new Twig_Token(Twig_Token::STRING_TYPE, 'base', 1),
+            new Twig_Token(Twig_Token::BLOCK_END_TYPE, '', 1),
+            new Twig_Token(Twig_Token::EOF_TYPE, '', 1),
+        )));
+
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node(array());
+    }
+
+    public function getTag()
+    {
+        return 'test';
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/TemplateTest.php b/vendor/twig/twig/test/Twig/Tests/TemplateTest.php
new file mode 100644
index 00000000..823a9ce9
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/TemplateTest.php
@@ -0,0 +1,626 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Tests_TemplateTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider getAttributeExceptions
+     */
+    public function testGetAttributeExceptions($template, $message, $useExt)
+    {
+        $name = 'index_'.($useExt ? 1 : 0);
+        $templates = array(
+            $name => $template.$useExt, // appending $useExt makes the template content unique
+        );
+
+        $env = new Twig_Environment(new Twig_Loader_Array($templates), array('strict_variables' => true));
+        if (!$useExt) {
+            $env->addNodeVisitor(new CExtDisablingNodeVisitor());
+        }
+        $template = $env->loadTemplate($name);
+
+        $context = array(
+            'string'          => 'foo',
+            'array'           => array('foo' => 'foo'),
+            'array_access'    => new Twig_TemplateArrayAccessObject(),
+            'magic_exception' => new Twig_TemplateMagicPropertyObjectWithException(),
+        );
+
+        try {
+            $template->render($context);
+            $this->fail('Accessing an invalid attribute should throw an exception.');
+        } catch (Twig_Error_Runtime $e) {
+            $this->assertSame(sprintf($message, $name), $e->getMessage());
+        }
+    }
+
+    public function getAttributeExceptions()
+    {
+        $tests = array(
+            array('{{ string["a"] }}', 'Impossible to access a key ("a") on a string variable ("foo") in "%s" at line 1', false),
+            array('{{ array["a"] }}', 'Key "a" for array with keys "foo" does not exist in "%s" at line 1', false),
+            array('{{ array_access["a"] }}', 'Key "a" in object (with ArrayAccess) of type "Twig_TemplateArrayAccessObject" does not exist in "%s" at line 1', false),
+            array('{{ string.a }}', 'Impossible to access an attribute ("a") on a string variable ("foo") in "%s" at line 1', false),
+            array('{{ string.a() }}', 'Impossible to invoke a method ("a") on a string variable ("foo") in "%s" at line 1', false),
+            array('{{ array.a }}', 'Key "a" for array with keys "foo" does not exist in "%s" at line 1', false),
+            array('{{ attribute(array, -10) }}', 'Key "-10" for array with keys "foo" does not exist in "%s" at line 1', false),
+            array('{{ array_access.a }}', 'Method "a" for object "Twig_TemplateArrayAccessObject" does not exist in "%s" at line 1', false),
+            array('{% macro foo(obj) %}{{ obj.missing_method() }}{% endmacro %}{{ _self.foo(array_access) }}', 'Method "missing_method" for object "Twig_TemplateArrayAccessObject" does not exist in "%s" at line 1', false),
+            array('{{ magic_exception.test }}', 'An exception has been thrown during the rendering of a template ("Hey! Don\'t try to isset me!") in "%s" at line 1.', false),
+        );
+
+        if (function_exists('twig_template_get_attributes')) {
+            foreach (array_slice($tests, 0) as $test) {
+                $test[2] = true;
+                $tests[] = $test;
+            }
+        }
+
+        return $tests;
+    }
+
+    /**
+     * @dataProvider getGetAttributeWithSandbox
+     */
+    public function testGetAttributeWithSandbox($object, $item, $allowed, $useExt)
+    {
+        $twig = new Twig_Environment();
+        $policy = new Twig_Sandbox_SecurityPolicy(array(), array(), array(/*method*/), array(/*prop*/), array());
+        $twig->addExtension(new Twig_Extension_Sandbox($policy, !$allowed));
+        $template = new Twig_TemplateTest($twig, $useExt);
+
+        try {
+            $template->getAttribute($object, $item, array(), 'any');
+
+            if (!$allowed) {
+                $this->fail();
+            }
+        } catch (Twig_Sandbox_SecurityError $e) {
+            if ($allowed) {
+                $this->fail();
+            }
+
+            $this->assertContains('is not allowed', $e->getMessage());
+        }
+    }
+
+    public function getGetAttributeWithSandbox()
+    {
+        $tests = array(
+            array(new Twig_TemplatePropertyObject(), 'defined', false, false),
+            array(new Twig_TemplatePropertyObject(), 'defined', true, false),
+            array(new Twig_TemplateMethodObject(), 'defined', false, false),
+            array(new Twig_TemplateMethodObject(), 'defined', true, false),
+        );
+
+        if (function_exists('twig_template_get_attributes')) {
+            foreach (array_slice($tests, 0) as $test) {
+                $test[3] = true;
+                $tests[] = $test;
+            }
+        }
+
+        return $tests;
+    }
+
+    /**
+     * @dataProvider getGetAttributeWithTemplateAsObject
+     */
+    public function testGetAttributeWithTemplateAsObject($useExt)
+    {
+        $template = new Twig_TemplateTest(new Twig_Environment(), $useExt);
+        $template1 = new Twig_TemplateTest(new Twig_Environment(), false);
+
+        $this->assertInstanceof('Twig_Markup', $template->getAttribute($template1, 'string'));
+        $this->assertEquals('some_string', $template->getAttribute($template1, 'string'));
+
+        $this->assertInstanceof('Twig_Markup', $template->getAttribute($template1, 'true'));
+        $this->assertEquals('1', $template->getAttribute($template1, 'true'));
+
+        $this->assertInstanceof('Twig_Markup', $template->getAttribute($template1, 'zero'));
+        $this->assertEquals('0', $template->getAttribute($template1, 'zero'));
+
+        $this->assertNotInstanceof('Twig_Markup', $template->getAttribute($template1, 'empty'));
+        $this->assertSame('', $template->getAttribute($template1, 'empty'));
+    }
+
+    public function getGetAttributeWithTemplateAsObject()
+    {
+        $bools = array(
+            array(false),
+        );
+
+        if (function_exists('twig_template_get_attributes')) {
+            $bools[] = array(true);
+        }
+
+        return $bools;
+    }
+
+    /**
+     * @dataProvider getTestsDependingOnExtensionAvailability
+     */
+    public function testGetAttributeOnArrayWithConfusableKey($useExt = false)
+    {
+        $template = new Twig_TemplateTest(
+            new Twig_Environment(),
+            $useExt
+        );
+
+        $array = array('Zero', 'One', -1 => 'MinusOne', '' => 'EmptyString', '1.5' => 'FloatButString', '01' => 'IntegerButStringWithLeadingZeros');
+
+        $this->assertSame('Zero', $array[false]);
+        $this->assertSame('One', $array[true]);
+        $this->assertSame('One', $array[1.5]);
+        $this->assertSame('One', $array['1']);
+        $this->assertSame('MinusOne', $array[-1.5]);
+        $this->assertSame('FloatButString', $array['1.5']);
+        $this->assertSame('IntegerButStringWithLeadingZeros', $array['01']);
+        $this->assertSame('EmptyString', $array[null]);
+
+        $this->assertSame('Zero', $template->getAttribute($array, false), 'false is treated as 0 when accessing an array (equals PHP behavior)');
+        $this->assertSame('One', $template->getAttribute($array, true), 'true is treated as 1 when accessing an array (equals PHP behavior)');
+        $this->assertSame('One', $template->getAttribute($array, 1.5), 'float is casted to int when accessing an array (equals PHP behavior)');
+        $this->assertSame('One', $template->getAttribute($array, '1'), '"1" is treated as integer 1 when accessing an array (equals PHP behavior)');
+        $this->assertSame('MinusOne', $template->getAttribute($array, -1.5), 'negative float is casted to int when accessing an array (equals PHP behavior)');
+        $this->assertSame('FloatButString', $template->getAttribute($array, '1.5'), '"1.5" is treated as-is when accessing an array (equals PHP behavior)');
+        $this->assertSame('IntegerButStringWithLeadingZeros', $template->getAttribute($array, '01'), '"01" is treated as-is when accessing an array (equals PHP behavior)');
+        $this->assertSame('EmptyString', $template->getAttribute($array, null), 'null is treated as "" when accessing an array (equals PHP behavior)');
+    }
+
+    public function getTestsDependingOnExtensionAvailability()
+    {
+        if (function_exists('twig_template_get_attributes')) {
+            return array(array(false), array(true));
+        }
+
+        return array(array(false));
+    }
+
+    /**
+     * @dataProvider getGetAttributeTests
+     */
+    public function testGetAttribute($defined, $value, $object, $item, $arguments, $type, $useExt = false)
+    {
+        $template = new Twig_TemplateTest(new Twig_Environment(), $useExt);
+
+        $this->assertEquals($value, $template->getAttribute($object, $item, $arguments, $type));
+    }
+
+    /**
+     * @dataProvider getGetAttributeTests
+     */
+    public function testGetAttributeStrict($defined, $value, $object, $item, $arguments, $type, $useExt = false, $exceptionMessage = null)
+    {
+        $template = new Twig_TemplateTest(new Twig_Environment(null, array('strict_variables' => true)), $useExt);
+
+        if ($defined) {
+            $this->assertEquals($value, $template->getAttribute($object, $item, $arguments, $type));
+        } else {
+            try {
+                $this->assertEquals($value, $template->getAttribute($object, $item, $arguments, $type));
+
+                throw new Exception('Expected Twig_Error_Runtime exception.');
+            } catch (Twig_Error_Runtime $e) {
+                if (null !== $exceptionMessage) {
+                    $this->assertSame($exceptionMessage, $e->getMessage());
+                }
+            }
+        }
+    }
+
+    /**
+     * @dataProvider getGetAttributeTests
+     */
+    public function testGetAttributeDefined($defined, $value, $object, $item, $arguments, $type, $useExt = false)
+    {
+        $template = new Twig_TemplateTest(new Twig_Environment(), $useExt);
+
+        $this->assertEquals($defined, $template->getAttribute($object, $item, $arguments, $type, true));
+    }
+
+    /**
+     * @dataProvider getGetAttributeTests
+     */
+    public function testGetAttributeDefinedStrict($defined, $value, $object, $item, $arguments, $type, $useExt = false)
+    {
+        $template = new Twig_TemplateTest(new Twig_Environment(null, array('strict_variables' => true)), $useExt);
+
+        $this->assertEquals($defined, $template->getAttribute($object, $item, $arguments, $type, true));
+    }
+
+    public function getGetAttributeTests()
+    {
+        $array = array(
+            'defined' => 'defined',
+            'zero'    => 0,
+            'null'    => null,
+            '1'       => 1,
+            'bar'     => true,
+            '09'      => '09',
+            '+4'      => '+4',
+        );
+
+        $objectArray         = new Twig_TemplateArrayAccessObject();
+        $stdObject           = (object) $array;
+        $magicPropertyObject = new Twig_TemplateMagicPropertyObject();
+        $propertyObject      = new Twig_TemplatePropertyObject();
+        $propertyObject1     = new Twig_TemplatePropertyObjectAndIterator();
+        $propertyObject2     = new Twig_TemplatePropertyObjectAndArrayAccess();
+        $methodObject        = new Twig_TemplateMethodObject();
+        $magicMethodObject   = new Twig_TemplateMagicMethodObject();
+
+        $anyType    = Twig_TemplateInterface::ANY_CALL;
+        $methodType = Twig_TemplateInterface::METHOD_CALL;
+        $arrayType  = Twig_TemplateInterface::ARRAY_CALL;
+
+        $basicTests = array(
+            // array(defined, value, property to fetch)
+            array(true,  'defined', 'defined'),
+            array(false, null,      'undefined'),
+            array(false, null,      'protected'),
+            array(true,  0,         'zero'),
+            array(true,  1,         1),
+            array(true,  1,         1.0),
+            array(true,  null,      'null'),
+            array(true,  true,      'bar'),
+            array(true,  '09',      '09'),
+            array(true,  '+4',      '+4'),
+        );
+        $testObjects = array(
+            // array(object, type of fetch)
+            array($array,               $arrayType),
+            array($objectArray,         $arrayType),
+            array($stdObject,           $anyType),
+            array($magicPropertyObject, $anyType),
+            array($methodObject,        $methodType),
+            array($methodObject,        $anyType),
+            array($propertyObject,      $anyType),
+            array($propertyObject1,     $anyType),
+            array($propertyObject2,     $anyType),
+        );
+
+        $tests = array();
+        foreach ($testObjects as $testObject) {
+            foreach ($basicTests as $test) {
+                // properties cannot be numbers
+                if (($testObject[0] instanceof stdClass || $testObject[0] instanceof Twig_TemplatePropertyObject) && is_numeric($test[2])) {
+                     continue;
+                }
+
+                if ('+4' === $test[2] && $methodObject === $testObject[0]) {
+                    continue;
+                }
+
+                $tests[] = array($test[0], $test[1], $testObject[0], $test[2], array(), $testObject[1]);
+            }
+        }
+
+        // additional method tests
+        $tests = array_merge($tests, array(
+            array(true, 'defined', $methodObject, 'defined',    array(), $methodType),
+            array(true, 'defined', $methodObject, 'DEFINED',    array(), $methodType),
+            array(true, 'defined', $methodObject, 'getDefined', array(), $methodType),
+            array(true, 'defined', $methodObject, 'GETDEFINED', array(), $methodType),
+            array(true, 'static',  $methodObject, 'static',     array(), $methodType),
+            array(true, 'static',  $methodObject, 'getStatic',  array(), $methodType),
+
+            array(true, '__call_undefined', $magicMethodObject, 'undefined', array(), $methodType),
+            array(true, '__call_UNDEFINED', $magicMethodObject, 'UNDEFINED', array(), $methodType),
+        ));
+
+        // add the same tests for the any type
+        foreach ($tests as $test) {
+            if ($anyType !== $test[5]) {
+                $test[5] = $anyType;
+                $tests[] = $test;
+            }
+        }
+
+        $methodAndPropObject = new Twig_TemplateMethodAndPropObject;
+
+        // additional method tests
+        $tests = array_merge($tests, array(
+            array(true, 'a', $methodAndPropObject, 'a', array(), $anyType),
+            array(true, 'a', $methodAndPropObject, 'a', array(), $methodType),
+            array(false, null, $methodAndPropObject, 'a', array(), $arrayType),
+
+            array(true, 'b_prop', $methodAndPropObject, 'b', array(), $anyType),
+            array(true, 'b', $methodAndPropObject, 'B', array(), $anyType),
+            array(true, 'b', $methodAndPropObject, 'b', array(), $methodType),
+            array(true, 'b', $methodAndPropObject, 'B', array(), $methodType),
+            array(false, null, $methodAndPropObject, 'b', array(), $arrayType),
+
+            array(false, null, $methodAndPropObject, 'c', array(), $anyType),
+            array(false, null, $methodAndPropObject, 'c', array(), $methodType),
+            array(false, null, $methodAndPropObject, 'c', array(), $arrayType),
+
+        ));
+
+        // tests when input is not an array or object
+        $tests = array_merge($tests, array(
+            array(false, null, 42, 'a', array(), $anyType, false, 'Impossible to access an attribute ("a") on a integer variable ("42")'),
+            array(false, null, "string", 'a', array(), $anyType, false, 'Impossible to access an attribute ("a") on a string variable ("string")'),
+            array(false, null, array(), 'a', array(), $anyType, false, 'Key "a" for array with keys "" does not exist'),
+        ));
+
+        // add twig_template_get_attributes tests
+
+        if (function_exists('twig_template_get_attributes')) {
+            foreach (array_slice($tests, 0) as $test) {
+                $test = array_pad($test, 7, null);
+                $test[6] = true;
+                $tests[] = $test;
+            }
+        }
+
+        return $tests;
+    }
+}
+
+class Twig_TemplateTest extends Twig_Template
+{
+    protected $useExtGetAttribute = false;
+
+    public function __construct(Twig_Environment $env, $useExtGetAttribute = false)
+    {
+        parent::__construct($env);
+        $this->useExtGetAttribute = $useExtGetAttribute;
+        Twig_Template::clearCache();
+    }
+
+    public function getZero()
+    {
+        return 0;
+    }
+
+    public function getEmpty()
+    {
+        return '';
+    }
+
+    public function getString()
+    {
+        return 'some_string';
+    }
+
+    public function getTrue()
+    {
+        return true;
+    }
+
+    public function getTemplateName()
+    {
+    }
+
+    public function getDebugInfo()
+    {
+        return array();
+    }
+
+    protected function doGetParent(array $context)
+    {
+    }
+
+    protected function doDisplay(array $context, array $blocks = array())
+    {
+    }
+
+    public function getAttribute($object, $item, array $arguments = array(), $type = Twig_TemplateInterface::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
+    {
+        if ($this->useExtGetAttribute) {
+            return twig_template_get_attributes($this, $object, $item, $arguments, $type, $isDefinedTest, $ignoreStrictCheck);
+        } else {
+            return parent::getAttribute($object, $item, $arguments, $type, $isDefinedTest, $ignoreStrictCheck);
+        }
+    }
+}
+
+class Twig_TemplateArrayAccessObject implements ArrayAccess
+{
+    protected $protected = 'protected';
+
+    public $attributes = array(
+        'defined' => 'defined',
+        'zero'    => 0,
+        'null'    => null,
+        '1'       => 1,
+        'bar'     => true,
+        '09'      => '09',
+        '+4'      => '+4',
+    );
+
+    public function offsetExists($name)
+    {
+        return array_key_exists($name, $this->attributes);
+    }
+
+    public function offsetGet($name)
+    {
+        return array_key_exists($name, $this->attributes) ? $this->attributes[$name] : null;
+    }
+
+    public function offsetSet($name, $value)
+    {
+    }
+
+    public function offsetUnset($name)
+    {
+    }
+}
+
+class Twig_TemplateMagicPropertyObject
+{
+    public $defined = 'defined';
+
+    public $attributes = array(
+        'zero'    => 0,
+        'null'    => null,
+        '1'       => 1,
+        'bar'     => true,
+        '09'      => '09',
+        '+4'      => '+4',
+    );
+
+    protected $protected = 'protected';
+
+    public function __isset($name)
+    {
+        return array_key_exists($name, $this->attributes);
+    }
+
+    public function __get($name)
+    {
+        return array_key_exists($name, $this->attributes) ? $this->attributes[$name] : null;
+    }
+}
+
+class Twig_TemplateMagicPropertyObjectWithException
+{
+    public function __isset($key)
+    {
+        throw new Exception("Hey! Don't try to isset me!");
+    }
+}
+
+class Twig_TemplatePropertyObject
+{
+    public $defined = 'defined';
+    public $zero    = 0;
+    public $null    = null;
+    public $bar     = true;
+
+    protected $protected = 'protected';
+}
+
+class Twig_TemplatePropertyObjectAndIterator extends Twig_TemplatePropertyObject implements IteratorAggregate
+{
+    public function getIterator()
+    {
+        return new ArrayIterator(array('foo', 'bar'));
+    }
+}
+
+class Twig_TemplatePropertyObjectAndArrayAccess extends Twig_TemplatePropertyObject implements ArrayAccess
+{
+    private $data = array();
+
+    public function offsetExists($offset)
+    {
+        return array_key_exists($offset, $this->data);
+    }
+
+    public function offsetGet($offset)
+    {
+        return $this->offsetExists($offset) ? $this->data[$offset] : 'n/a';
+    }
+
+    public function offsetSet($offset, $value)
+    {
+    }
+
+    public function offsetUnset($offset)
+    {
+    }
+}
+
+class Twig_TemplateMethodObject
+{
+    public function getDefined()
+    {
+        return 'defined';
+    }
+
+    public function get1()
+    {
+        return 1;
+    }
+
+    public function get09()
+    {
+        return '09';
+    }
+
+    public function getZero()
+    {
+        return 0;
+    }
+
+    public function getNull()
+    {
+        return null;
+    }
+
+    public function isBar()
+    {
+        return true;
+    }
+
+    protected function getProtected()
+    {
+        return 'protected';
+    }
+
+    public static function getStatic()
+    {
+        return 'static';
+    }
+}
+
+class Twig_TemplateMethodAndPropObject
+{
+    private $a = 'a_prop';
+    public function getA()
+    {
+        return 'a';
+    }
+
+    public $b = 'b_prop';
+    public function getB()
+    {
+        return 'b';
+    }
+
+    private $c = 'c_prop';
+    private function getC()
+    {
+        return 'c';
+    }
+}
+
+class Twig_TemplateMagicMethodObject
+{
+    public function __call($method, $arguments)
+    {
+        return '__call_'.$method;
+    }
+}
+
+class CExtDisablingNodeVisitor implements Twig_NodeVisitorInterface
+{
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Expression_GetAttr) {
+            $node->setAttribute('disable_c_ext', true);
+        }
+
+        return $node;
+    }
+
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        return $node;
+    }
+
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/TokenStreamTest.php b/vendor/twig/twig/test/Twig/Tests/TokenStreamTest.php
new file mode 100644
index 00000000..fd4ec633
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/TokenStreamTest.php
@@ -0,0 +1,70 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Tests_TokenStreamTest extends PHPUnit_Framework_TestCase
+{
+    protected static $tokens;
+
+    public function setUp()
+    {
+        self::$tokens = array(
+            new Twig_Token(Twig_Token::TEXT_TYPE, 1, 1),
+            new Twig_Token(Twig_Token::TEXT_TYPE, 2, 1),
+            new Twig_Token(Twig_Token::TEXT_TYPE, 3, 1),
+            new Twig_Token(Twig_Token::TEXT_TYPE, 4, 1),
+            new Twig_Token(Twig_Token::TEXT_TYPE, 5, 1),
+            new Twig_Token(Twig_Token::TEXT_TYPE, 6, 1),
+            new Twig_Token(Twig_Token::TEXT_TYPE, 7, 1),
+            new Twig_Token(Twig_Token::EOF_TYPE, 0, 1),
+        );
+    }
+
+    public function testNext()
+    {
+        $stream = new Twig_TokenStream(self::$tokens);
+        $repr = array();
+        while (!$stream->isEOF()) {
+            $token = $stream->next();
+
+            $repr[] = $token->getValue();
+        }
+        $this->assertEquals('1, 2, 3, 4, 5, 6, 7', implode(', ', $repr), '->next() advances the pointer and returns the current token');
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @expectedMessage   Unexpected end of template
+     */
+    public function testEndOfTemplateNext()
+    {
+        $stream = new Twig_TokenStream(array(
+            new Twig_Token(Twig_Token::BLOCK_START_TYPE, 1, 1),
+        ));
+        while (!$stream->isEOF()) {
+            $stream->next();
+        }
+    }
+
+    /**
+     * @expectedException Twig_Error_Syntax
+     * @expectedMessage   Unexpected end of template
+     */
+    public function testEndOfTemplateLook()
+    {
+        $stream = new Twig_TokenStream(array(
+            new Twig_Token(Twig_Token::BLOCK_START_TYPE, 1, 1),
+        ));
+        while (!$stream->isEOF()) {
+            $stream->look();
+            $stream->next();
+        }
+    }
+}
diff --git a/vendor/twig/twig/test/Twig/Tests/escapingTest.php b/vendor/twig/twig/test/Twig/Tests/escapingTest.php
new file mode 100644
index 00000000..b41b5f97
--- /dev/null
+++ b/vendor/twig/twig/test/Twig/Tests/escapingTest.php
@@ -0,0 +1,320 @@
+<?php
+
+/**
+ * This class is adapted from code coming from Zend Framework.
+ *
+ * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+class Twig_Test_EscapingTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * All character encodings supported by htmlspecialchars()
+     */
+    protected $htmlSpecialChars = array(
+        '\''    => '&#039;',
+        '"'     => '&quot;',
+        '<'     => '&lt;',
+        '>'     => '&gt;',
+        '&'     => '&amp;'
+    );
+
+    protected $htmlAttrSpecialChars = array(
+        '\''    => '&#x27;',
+        /* Characters beyond ASCII value 255 to unicode escape */
+        'Ā'     => '&#x0100;',
+        /* Immune chars excluded */
+        ','     => ',',
+        '.'     => '.',
+        '-'     => '-',
+        '_'     => '_',
+        /* Basic alnums excluded */
+        'a'     => 'a',
+        'A'     => 'A',
+        'z'     => 'z',
+        'Z'     => 'Z',
+        '0'     => '0',
+        '9'     => '9',
+        /* Basic control characters and null */
+        "\r"    => '&#x0D;',
+        "\n"    => '&#x0A;',
+        "\t"    => '&#x09;',
+        "\0"    => '&#xFFFD;', // should use Unicode replacement char
+        /* Encode chars as named entities where possible */
+        '<'     => '&lt;',
+        '>'     => '&gt;',
+        '&'     => '&amp;',
+        '"'     => '&quot;',
+        /* Encode spaces for quoteless attribute protection */
+        ' '     => '&#x20;',
+    );
+
+    protected $jsSpecialChars = array(
+        /* HTML special chars - escape without exception to hex */
+        '<'     => '\\x3C',
+        '>'     => '\\x3E',
+        '\''    => '\\x27',
+        '"'     => '\\x22',
+        '&'     => '\\x26',
+        /* Characters beyond ASCII value 255 to unicode escape */
+        'Ā'     => '\\u0100',
+        /* Immune chars excluded */
+        ','     => ',',
+        '.'     => '.',
+        '_'     => '_',
+        /* Basic alnums excluded */
+        'a'     => 'a',
+        'A'     => 'A',
+        'z'     => 'z',
+        'Z'     => 'Z',
+        '0'     => '0',
+        '9'     => '9',
+        /* Basic control characters and null */
+        "\r"    => '\\x0D',
+        "\n"    => '\\x0A',
+        "\t"    => '\\x09',
+        "\0"    => '\\x00',
+        /* Encode spaces for quoteless attribute protection */
+        ' '     => '\\x20',
+    );
+
+    protected $urlSpecialChars = array(
+        /* HTML special chars - escape without exception to percent encoding */
+        '<'     => '%3C',
+        '>'     => '%3E',
+        '\''    => '%27',
+        '"'     => '%22',
+        '&'     => '%26',
+        /* Characters beyond ASCII value 255 to hex sequence */
+        'Ā'     => '%C4%80',
+        /* Punctuation and unreserved check */
+        ','     => '%2C',
+        '.'     => '.',
+        '_'     => '_',
+        '-'     => '-',
+        ':'     => '%3A',
+        ';'     => '%3B',
+        '!'     => '%21',
+        /* Basic alnums excluded */
+        'a'     => 'a',
+        'A'     => 'A',
+        'z'     => 'z',
+        'Z'     => 'Z',
+        '0'     => '0',
+        '9'     => '9',
+        /* Basic control characters and null */
+        "\r"    => '%0D',
+        "\n"    => '%0A',
+        "\t"    => '%09',
+        "\0"    => '%00',
+        /* PHP quirks from the past */
+        ' '     => '%20',
+        '~'     => '~',
+        '+'     => '%2B',
+    );
+
+    protected $cssSpecialChars = array(
+        /* HTML special chars - escape without exception to hex */
+        '<'     => '\\3C ',
+        '>'     => '\\3E ',
+        '\''    => '\\27 ',
+        '"'     => '\\22 ',
+        '&'     => '\\26 ',
+        /* Characters beyond ASCII value 255 to unicode escape */
+        'Ā'     => '\\100 ',
+        /* Immune chars excluded */
+        ','     => '\\2C ',
+        '.'     => '\\2E ',
+        '_'     => '\\5F ',
+        /* Basic alnums excluded */
+        'a'     => 'a',
+        'A'     => 'A',
+        'z'     => 'z',
+        'Z'     => 'Z',
+        '0'     => '0',
+        '9'     => '9',
+        /* Basic control characters and null */
+        "\r"    => '\\D ',
+        "\n"    => '\\A ',
+        "\t"    => '\\9 ',
+        "\0"    => '\\0 ',
+        /* Encode spaces for quoteless attribute protection */
+        ' '     => '\\20 ',
+    );
+
+    protected $env;
+
+    public function setUp()
+    {
+        $this->env = new Twig_Environment();
+    }
+
+    public function testHtmlEscapingConvertsSpecialChars()
+    {
+        foreach ($this->htmlSpecialChars as $key => $value) {
+            $this->assertEquals($value, twig_escape_filter($this->env, $key, 'html'), 'Failed to escape: '.$key);
+        }
+    }
+
+    public function testHtmlAttributeEscapingConvertsSpecialChars()
+    {
+        foreach ($this->htmlAttrSpecialChars as $key => $value) {
+            $this->assertEquals($value, twig_escape_filter($this->env, $key, 'html_attr'), 'Failed to escape: '.$key);
+        }
+    }
+
+    public function testJavascriptEscapingConvertsSpecialChars()
+    {
+        foreach ($this->jsSpecialChars as $key => $value) {
+            $this->assertEquals($value, twig_escape_filter($this->env, $key, 'js'), 'Failed to escape: '.$key);
+        }
+    }
+
+    public function testJavascriptEscapingReturnsStringIfZeroLength()
+    {
+        $this->assertEquals('', twig_escape_filter($this->env, '', 'js'));
+    }
+
+    public function testJavascriptEscapingReturnsStringIfContainsOnlyDigits()
+    {
+        $this->assertEquals('123', twig_escape_filter($this->env, '123', 'js'));
+    }
+
+    public function testCssEscapingConvertsSpecialChars()
+    {
+        foreach ($this->cssSpecialChars as $key => $value) {
+            $this->assertEquals($value, twig_escape_filter($this->env, $key, 'css'), 'Failed to escape: '.$key);
+        }
+    }
+
+    public function testCssEscapingReturnsStringIfZeroLength()
+    {
+        $this->assertEquals('', twig_escape_filter($this->env, '', 'css'));
+    }
+
+    public function testCssEscapingReturnsStringIfContainsOnlyDigits()
+    {
+        $this->assertEquals('123', twig_escape_filter($this->env, '123', 'css'));
+    }
+
+    public function testUrlEscapingConvertsSpecialChars()
+    {
+        foreach ($this->urlSpecialChars as $key => $value) {
+            $this->assertEquals($value, twig_escape_filter($this->env, $key, 'url'), 'Failed to escape: '.$key);
+        }
+    }
+
+    /**
+     * Range tests to confirm escaped range of characters is within OWASP recommendation
+     */
+
+    /**
+     * Only testing the first few 2 ranges on this prot. function as that's all these
+     * other range tests require
+     */
+    public function testUnicodeCodepointConversionToUtf8()
+    {
+        $expected = " ~ޙ";
+        $codepoints = array(0x20, 0x7e, 0x799);
+        $result = '';
+        foreach ($codepoints as $value) {
+            $result .= $this->codepointToUtf8($value);
+        }
+        $this->assertEquals($expected, $result);
+    }
+
+    /**
+     * Convert a Unicode Codepoint to a literal UTF-8 character.
+     *
+     * @param int Unicode codepoint in hex notation
+     * @return string UTF-8 literal string
+     */
+    protected function codepointToUtf8($codepoint)
+    {
+        if ($codepoint < 0x80) {
+            return chr($codepoint);
+        }
+        if ($codepoint < 0x800) {
+            return chr($codepoint >> 6 & 0x3f | 0xc0)
+                . chr($codepoint & 0x3f | 0x80);
+        }
+        if ($codepoint < 0x10000) {
+            return chr($codepoint >> 12 & 0x0f | 0xe0)
+                . chr($codepoint >> 6 & 0x3f | 0x80)
+                . chr($codepoint & 0x3f | 0x80);
+        }
+        if ($codepoint < 0x110000) {
+            return chr($codepoint >> 18 & 0x07 | 0xf0)
+                . chr($codepoint >> 12 & 0x3f | 0x80)
+                . chr($codepoint >> 6 & 0x3f | 0x80)
+                . chr($codepoint & 0x3f | 0x80);
+        }
+        throw new Exception('Codepoint requested outside of Unicode range');
+    }
+
+    public function testJavascriptEscapingEscapesOwaspRecommendedRanges()
+    {
+        $immune = array(',', '.', '_'); // Exceptions to escaping ranges
+        for ($chr=0; $chr < 0xFF; $chr++) {
+            if ($chr >= 0x30 && $chr <= 0x39
+            || $chr >= 0x41 && $chr <= 0x5A
+            || $chr >= 0x61 && $chr <= 0x7A) {
+                $literal = $this->codepointToUtf8($chr);
+                $this->assertEquals($literal, twig_escape_filter($this->env, $literal, 'js'));
+            } else {
+                $literal = $this->codepointToUtf8($chr);
+                if (in_array($literal, $immune)) {
+                    $this->assertEquals($literal, twig_escape_filter($this->env, $literal, 'js'));
+                } else {
+                    $this->assertNotEquals(
+                        $literal,
+                        twig_escape_filter($this->env, $literal, 'js'),
+                        "$literal should be escaped!");
+                }
+            }
+        }
+    }
+
+    public function testHtmlAttributeEscapingEscapesOwaspRecommendedRanges()
+    {
+        $immune = array(',', '.', '-', '_'); // Exceptions to escaping ranges
+        for ($chr=0; $chr < 0xFF; $chr++) {
+            if ($chr >= 0x30 && $chr <= 0x39
+            || $chr >= 0x41 && $chr <= 0x5A
+            || $chr >= 0x61 && $chr <= 0x7A) {
+                $literal = $this->codepointToUtf8($chr);
+                $this->assertEquals($literal, twig_escape_filter($this->env, $literal, 'html_attr'));
+            } else {
+                $literal = $this->codepointToUtf8($chr);
+                if (in_array($literal, $immune)) {
+                    $this->assertEquals($literal, twig_escape_filter($this->env, $literal, 'html_attr'));
+                } else {
+                    $this->assertNotEquals(
+                        $literal,
+                        twig_escape_filter($this->env, $literal, 'html_attr'),
+                        "$literal should be escaped!");
+                }
+            }
+        }
+    }
+
+    public function testCssEscapingEscapesOwaspRecommendedRanges()
+    {
+        $immune = array(); // CSS has no exceptions to escaping ranges
+        for ($chr=0; $chr < 0xFF; $chr++) {
+            if ($chr >= 0x30 && $chr <= 0x39
+            || $chr >= 0x41 && $chr <= 0x5A
+            || $chr >= 0x61 && $chr <= 0x7A) {
+                $literal = $this->codepointToUtf8($chr);
+                $this->assertEquals($literal, twig_escape_filter($this->env, $literal, 'css'));
+            } else {
+                $literal = $this->codepointToUtf8($chr);
+                $this->assertNotEquals(
+                    $literal,
+                    twig_escape_filter($this->env, $literal, 'css'),
+                    "$literal should be escaped!");
+            }
+        }
+    }
+}
diff --git a/vendor/twig/twig/test/bootstrap.php b/vendor/twig/twig/test/bootstrap.php
new file mode 100644
index 00000000..aecb976f
--- /dev/null
+++ b/vendor/twig/twig/test/bootstrap.php
@@ -0,0 +1,13 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+require_once dirname(__FILE__).'/../lib/Twig/Autoloader.php';
+Twig_Autoloader::register(true);