Generate HTML documentation using MkDocs (WIP)

MkDocs is a static site generator geared towards building project documentation.
Documentation source files are written in Markdown, and configured with a single YAML file.

 * http://www.mkdocs.org/
 * http://www.mkdocs.org/user-guide/configuration/

Ref. #312

* remove pandoc-generated HTML documentation
* move markdown doc to doc/md/,
* mkdocs.yml:
  * generate HTML doc in doc/html
  * add pages TOC/ordering
  * use index.md as index page
* Makefile: remove execute permissions from generated files
* Makefile: rewrite htmlpages GFM to markdown conversion using sed:
   awk expression aslo matched '][' which causes invalid output on complex links with images or code blocks
* Add mkdocs.yml to .gitattributes, exclude this file from release archives
* Makefile: rename: htmldoc -> doc_html target
* run make doc: pull latest markdown documentation from wiki
* run make htmlpages: update html documentation

1 files changed, 23 insertions, 0 deletions

diff --git a/doc/md/Browsing-and-searching.md b/doc/md/Browsing-and-searching.md
new file mode 100644
index 00000000..ad62c2f0
--- /dev/null
+++ b/doc/md/Browsing-and-searching.md
@@ -0,0 +1,23 @@
+## Plain text search
+
+Use the `Search text` field to search in _any_ of the fields of all links (Title, URL, Description...)
+
+**Exclude text/tags:** Use the `-` operator before a word or tag (example `-uninteresting`) to prevent entries containing (or tagged) `uninteresting` from showing up in the search results.
+
+**Exact text search:** Use double-quotes (example `"exact search"`) to search for the exact expression.
+
+Both exclude patterns and exact searches can be combined with normal searches (example `"exact search" term otherterm -notthis "very exact" stuff -notagain`)
+
+## Tags search
+
+Use the `Filter by tags` field to restrict displayed links to entries tagged with one or multiple tags (use space to separate tags).  
+
+**Hidden tags:** Tags starting with a dot `.` (example `.secret`) are private. They can only be seen and searched when logged in.
+
+Alternatively you can use the `Tag cloud` to discover all tags and click on any of them to display related links.
+
+To search for links that are not tagged, enter `""` in the tag search field.
+
+## Filtering RSS feeds/Picture wall
+
+RSS feeds can also be restricted to only return items matching a text/tag search: see [[RSS feeds]].