Reword docs (#176)

* Reword documentation;

* Wrap lines at 80 characters in the documentation.

* Wrap CONTRIBUTING.md too;

* Tweaks to CONTRIBUTING.md wording;

* Move development section to CONTRIBUTING.md;

* Explain database creation in CONTRIBUTING.md;

4 files changed, 196 insertions, 88 deletions

diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 3764eb7c4..989087728 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -7,30 +7,90 @@ Interesting in contributing? Awesome :)
   * [Give your feedback](#give-your-feedback)
   * [Develop on the Server side](#develop-on-the-server-side)
   * [Develop on the Client side](#develop-on-the-client-side)
+  * [Get started with development](#get-started-with-development)
   * [Write documentation](#write-documentation)
 
 
 ## Give your feedback
 
-Even if you are not a developer, or you do not want to develop on PeerTube you can give a feedback on potential bugs, features that you are interested in, user interace, design, decentralized architecture...
+You don't need to know how to code to start contributing to PeerTube! Other
+contributions are very valuable too, among which: you can test the software and
+report bugs, you can give feedback on potential bugs, features that you are
+interested in, user interace, design, decentralized architecture...
 
 
+## Development
+
 ## Develop on the Server side
 
-The server is a web server developed with [NodeJS](https://nodejs.org)/[Express](http://expressjs.com).
+The server is a web server developed with
+[NodeJS](https://nodejs.org)/[Express](http://expressjs.com).
 
-Newcommer? You can find a documentation of the server code/architecture [here](https://github.com/Chocobozzz/PeerTube/blob/master/support/doc/server/code.md).
+Newcomer? You can find a documentation of the server code/architecture
+[here](https://github.com/Chocobozzz/PeerTube/blob/master/support/doc/server/code.md).
 
-Do not hesitate to talk about the functionnality you want to develop by creating an issue :)
+Don't hesitate to talk about features you want to develop by creating an issue
+before you start working on them :).
 
 
 ## Develop on the Client side
 
-The client is a web application developed with [TypeScript](https://www.typescriptlang.org/)/[Angular2](https://angular.io/)
+The client is a web application developed with
+[TypeScript](https://www.typescriptlang.org/)/[Angular2](https://angular.io/).
+
+Newcomer? You can find a documentation of the server code/architecture
+[here](https://github.com/Chocobozzz/PeerTube/blob/master/support/doc/client/code.md).
+
+
+## Get started with development
+
+In this mode, the server will run requests between instances more quickly, the
+video durations are limited to a few seconds.
+
+### Prerequisites
+
+First, make sure that you have followed the steps to install the dependencies.
+
+Then, create a postgres database and user with the values set in the
+`config/default.yaml` file. For instance, if you do not change the values
+there, the following commands would create a new database called `peertube_dev`
+and a postgres user called `peertube` with password `peertube`:
+
+```bash
+    # sudo -u postgres createuser -P peertube
+    Enter password for new role: peertube
+    # sudo -u postgres createdb -O peertube peertube_dev
+```
+
+### Server side
+
+To develop on the server-side:
+
+```bash
+    $ npm run dev:server
+```
+
+Then, the server will listen on `localhost:9000`. When server source files
+change, these are automatically recompiled and the server will automatically
+restart.
+
+### Client side
+
+To develop on the client side:
+
+```bash
+    $ npm run dev:client
+```
+
+The API will listen on `localhost:9000` and the frontend on `localhost:3000`.
+Client files are automatically compiled on change, and the web browser will
+reload them automatically thanks to hot module replacement.
 
-Newcommer? You can find a documentation of the server code/architecture [here](https://github.com/Chocobozzz/PeerTube/blob/master/support/doc/client/code.md).
+**Username**: *root* <br/>
+**Password**: *test*
 
 
 ## Write documentation
 
-You can help to write the documentation of the REST API, code, architecture, demonstrations...
+You can help to write the documentation of the REST API, code, architecture,
+demonstrations...
diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index ac62fa4b7..ecc4d2d40 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -2,25 +2,39 @@
 
 ## Vocabulary
 
-  - **Fediverse:** several servers following each others
-  - **Instance:** a server which runs PeerTube in the fediverse
-  - **Origin instance:** the instance on which the video was uploaded and which is seeding (WebSeed protocol) the video
-  - **Following:** the action of a PeerTube instance which will follow another instance (subscribe to its videos)
+  - **Fediverse:** several servers following each others.
+  - **Instance:** a server which runs PeerTube in the fediverse.
+  - **Origin instance:** the instance on which the video was uploaded and which
+    is seeding (through the WebSeed protocol) the video.
+  - **Following:** the action of a PeerTube instance which will follow another
+    instance (subscribe to its videos).
 
 ## Base
 
 ### Communications
-  * All the communications between the instances are signed with [Linked Data Signatures](https://w3c-dvcg.github.io/ld-signatures/) with the private key of the account that made the action
-  * We use the [ActivityPub](https://www.w3.org/TR/activitypub/) protocol (only server-server for now). Object models could be found in [shared/models/activitypub directory](https://github.com/Chocobozzz/PeerTube/tree/develop/shared/models/activitypub).
-  * All the requests are retried several times if they fail
-  * The maximum of points would be defined
+  * All the communication between the instances are signed with [Linked Data
+    Signatures](https://w3c-dvcg.github.io/ld-signatures/) with the private key
+    of the account that authored the action.
+  * We use the [ActivityPub](https://www.w3.org/TR/activitypub/) protocol (only
+    server-server for now). Object models could be found in
+    [shared/models/activitypub
+    directory](https://github.com/Chocobozzz/PeerTube/tree/develop/shared/models/activitypub).
+  * All the requests are retried several times if they fail.
+  * The maximum of points would be defined.
 
 ### Instance
-  * An instance has a websocket tracker which is responsible for all the video uploaded in it
-  * An instance has an administrator that can follow other instances
-  * An instance can be configured to follow back automatically
-  * An instance can blacklist other instances (only used in "follow back" mode)
-  * An instance cannot choose which other instance follow it, but it can decide to **reject all** followers
-  * After having uploaded a video, the instance seeds it (WebSeed protocol)
-  * If a user wants to watch a video, he asks its instance the magnet URI and the frontend adds the torrent (with WebTorrent), creates the HTML5 video player and streams the file into it
-  * A user watching a video seeds it too (BitTorrent) so another user who is watching the same video can get the data from the origin server and the user 1 (etc)
+  * An instance has a websocket tracker which is responsible for all the video
+    uploaded in it.
+  * An instance has an administrator that can follow other instances.
+  * An instance can be configured to follow back automatically.
+  * An instance can blacklist other instances (only used in "follow back"
+    mode).
+  * An instance cannot choose which other instances follow it, but it can
+    decide to **reject all** followers.
+  * After having uploaded a video, the instance seeds it (WebSeed protocol).
+  * If a user wants to watch a video, they ask its instance the magnet URI and
+    the frontend adds the torrent (with WebTorrent), creates the HTML5 video
+    player and streams the file into it.
+  * A user watching a video seeds it too (BitTorrent). Thus another user who is
+    watching the same video can get the data from the origin server and other
+    users watching it.
diff --git a/FAQ.md b/FAQ.md
index 7e2b3339c..06c86ce10 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -2,25 +2,31 @@
 
 ## If nobody watches a video, is it seeded?
 
-Yes, the origin server always seeds videos uploaded on it through [Webseed](http://www.bittorrent.org/beps/bep_0019.html).
+Yes, the origin server always seeds videos uploaded on it thanks to
+[Webseed](http://www.bittorrent.org/beps/bep_0019.html).
 
 
 ## What is WebSeed?
 
-It is a BitTorrent extension that allow a server to seed a file through HTTP. It just need to serve statically a file, and then the clients will request chunks with a Content-Range HTTP header.
+It is a BitTorrent extension that allows a server to seed a file through HTTP.
+It just needs to statically serve a file, then the clients will request chunks
+with a `Content-Range` HTTP header.
 
 
-## If a client requests each chunk of a video through HTTP, the server be overloaded!
+## If a client requests each chunk of a video through HTTP, will the server be overloaded?
 
-Not really. Reverse proxies like Nginx handle very well requests of static files. In my tests it can send chunks at 10MB/s without consuming more than 5% of CPU on a very small VPS.
+Not really. Reverse proxies like Nginx handle very well requests of static
+files. In my tests, it can send chunks at 10MB/s without consuming more than 5%
+of CPU on a very small VPS.
 
 
-## An index of all videos of servers you follow won't be too large for small servers?
+## Will an index of all the videos of servers you follow be too large for small servers?
 
-No, 1000000 videos will represent around 2GB on PostgreSQL. It is acceptable for a video platform.
+In our benchmarks, 1,000,000 videos takes around 2GB of storage on PostgreSQL.
+We think it is acceptable for a video platform.
 
 
-## What kind of videos can I upload?
+## What codecs can I use for the videos I want to upload?
 
 WEBM, MP4 or OGV videos.
 
@@ -29,4 +35,5 @@ WEBM, MP4 or OGV videos.
 
 If you already have followers, you can't.
 
-If you don't: update your configuration and run `NODE_ENV=production npm run update-host` to update the torrent files.
+If you don't have any followers, update your configuration and run
+`NODE_ENV=production npm run update-host` to update the torrent files.
diff --git a/README.md b/README.md
index 077d6b8f0..094d81c4a 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,14 @@
 </h1>
 
 <h4 align="center">
-Federated (ActivityPub) video streaming platform using P2P (BitTorrent) directly in the web browser with <a href="https://github.com/feross/webtorrent">WebTorrent</a>.
+Federated (ActivityPub) video streaming platform using P2P (BitTorrent)
+directly in the web browser with <a href="https://github.com/feross/webtorrent">WebTorrent</a>.
 </h4>
 
-**PeerTube is sponsored by [Framasoft](https://framatube.org/#en), a non-profit that promotes, spreads and develops free-libre software. If you want to support this project, please [consider donating them](https://soutenir.framasoft.org/en/).**
+**PeerTube is sponsored by [Framasoft](https://framatube.org/#en), a non-profit
+that promotes, spreads and develops free culture in general, and free-libre
+software in particular. If you want to support this project, please [consider
+donating them](https://soutenir.framasoft.org/en/).**
 
 <p align="center">
   <strong>Client</strong>
@@ -58,20 +62,28 @@ Federated (ActivityPub) video streaming platform using P2P (BitTorrent) directly
 
 ## Demonstration
 
-Want to see in action?
+Want to see it in action?
 
    * [Demo server](http://peertube.cpy.re)
-   * [Video](https://peertube.cpy.re/videos/watch/f78a97f8-a142-4ce1-a5bd-154bf9386504) to see how the "decentralization feature" looks like
-   * Experimental demo servers that share videos (they are in the same network): [peertube2](http://peertube2.cpy.re), [peertube3](http://peertube3.cpy.re). Since I do experiments with them, sometimes they might not work correctly.
+   * [Video](https://peertube.cpy.re/videos/watch/f78a97f8-a142-4ce1-a5bd-154bf9386504)
+     to see how the "decentralization feature" looks like
+   * Experimental demo servers that share videos (they are in the same
+     network): [peertube2](http://peertube2.cpy.re),
+     [peertube3](http://peertube3.cpy.re). Since I do experiments with them,
+     sometimes they might not work correctly.
 
 ## Why
 
-We can't build a FOSS video streaming alternatives to YouTube, Dailymotion, Vimeo... with a centralized software. One organization alone cannot have enough money to pay bandwidth and video storage of its server.
+We can't build a FOSS video streaming alternatives to YouTube, Dailymotion,
+Vimeo... with a centralized software. One organization alone may not have
+enough money to pay for bandwidth and video storage of its servers.
 
-So we need to have a decentralized network (as [Diaspora](https://github.com/diaspora/diaspora) for example).
-But it's not enough because one video could become famous and overload the server.
-It's the reason why we need to use a P2P protocol to limit the server load.
-Thanks to [WebTorrent](https://github.com/feross/webtorrent), we can make P2P (thus bittorrent) inside the web browser right now.
+So we need to have a decentralized network of servers seeding videos (as
+[Diaspora](https://github.com/diaspora/diaspora) for example).  But it's not
+enough because one video could become famous and overload the server.  It's the
+reason why we need to use a P2P protocol to limit the server load.  Thanks to
+[WebTorrent](https://github.com/feross/webtorrent), we can make P2P (thus
+bittorrent) inside the web browser, as of today.
 
 ## Features
 
@@ -111,7 +123,8 @@ Thanks to [WebTorrent](https://github.com/feross/webtorrent), we can make P2P (t
 
 ## Installation
 
-See [wiki](https://github.com/Chocobozzz/PeerTube/wiki) for complete installation commands.
+See [wiki](https://github.com/Chocobozzz/PeerTube/wiki) for complete
+installation commands.
 
 ### Front compatibility
 
@@ -128,12 +141,16 @@ See [wiki](https://github.com/Chocobozzz/PeerTube/wiki) for complete installatio
 
 #### Debian
 
-  1. Install NodeJS 8.x (current LTS): [https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
-  2. Install yarn: [https://yarnpkg.com/en/docs/install](https://yarnpkg.com/en/docs/install)
+  1. Install NodeJS 8.x (current LTS):
+     [https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
+  2. Install yarn:
+     [https://yarnpkg.com/en/docs/install](https://yarnpkg.com/en/docs/install)
   4. Run:
 
+```bash
     $ apt-get update
     $ apt-get install ffmpeg postgresql openssl
+```
 
 #### Ubuntu 16.04
 
@@ -141,112 +158,122 @@ See [wiki](https://github.com/Chocobozzz/PeerTube/wiki) for complete installatio
   2. Install yarn: (same as Debian)
   3. Run:
 
+```bash
     $ apt-get update
     $ apt-get install ffmpeg postgresql openssl
+```
 
 #### Arch Linux
 
-  1. Run: 
+  1. Run:
 
+```bash
     $ pacman -S nodejs yarn ffmpeg postgresql openssl
+```
 
-#### Other distribution... (PR welcome)
+#### Other distributions
 
+Feel free to update this README file in a pull request!
 
-### Sources
+### Build from the sources
 
+```bash
     $ git clone -b master https://github.com/Chocobozzz/PeerTube
     $ cd PeerTube
     $ yarn install
     $ npm run build
+```
 
 ## Usage
 
 ### Production
 
-If you want to run PeerTube for production (bad idea for now :) ):
+If you want to run PeerTube in production (which might be a bad idea for now :) ):
 
+```bash
     $ cp config/production.yaml.example config/production.yaml
+```
 
-Then edit the `config/production.yaml` file according to your webserver configuration. Keys set in this file will override those of `config/default.yml`.
+Then edit the `config/production.yaml` file according to your webserver
+configuration. Keys set in this file will override those of
+`config/default.yml`.
 
-Finally, run the server with the `production` `NODE_ENV` variable set.
+Finally, run the server with the `NODE_ENV` environment variable set to
+`production`:
 
+```bash
     $ NODE_ENV=production npm start
+```
 
-The administrator password is automatically generated and can be found in the logs. You can set another password with:
+The administrator password is automatically generated and can be found in the
+logs. You can set another password with:
 
+```bash
     $ NODE_ENV=production npm run reset-password -- -u root
+```
 
 **Nginx template** (reverse proxy): https://github.com/Chocobozzz/PeerTube/tree/master/support/nginx <br />
 **Systemd template**: https://github.com/Chocobozzz/PeerTube/tree/master/support/systemd
 
 You can check the application (CORS headers, tracker websocket...) by running:
 
+```bash
     $ NODE_ENV=production npm run check
+```
 
 ### Upgrade
 
-The following commands will upgrade the source (according to your current branch), upgrade node modules and rebuild client application:
+The following commands will upgrade the source (according to your current
+branch), upgrade node modules and rebuild client application:
 
+```bash
     # systemctl stop peertube
     $ npm run upgrade-peertube
     # systemctl start peertube
+```
 
-### Development
-
-In this mode, the server will run requests between instances more quickly, the video durations are limited to a few seconds.
-
-To develop on the server-side (server files are automatically compiled when we modify them and the server restarts automatically too):
-
-    $ npm run dev:server
-
-The server (with the client) will listen on `localhost:9000`.
-
-
-To develop on the client side (client files are automatically compiled when we modify them):
-
-    $ npm run dev:client
-
-The API will listen on `localhost:9000` and the frontend on `localhost:3000` (with hot module replacement, you don't need to refresh the web browser).
-
-**Username**: *root* <br/>
-**Password**: *test*
-
-### Test with 3 fresh nodes
+### Test with three fresh nodes
 
+```bash
     $ npm run clean:server:test
     $ npm run play
+```
 
-Then you will get access to the three nodes at `http://localhost:900{1,2,3}` with the `root` as username and `test{1,2,3}` for the password.
+Then you will get access to the three nodes at `http://localhost:900{1,2,3}`
+with the `root` as username and `test{1,2,3}` for the password.
 
 ### Other commands
 
-To print all available command run:
+To print all available commands, run:
 
+```bash
     $ npm run help
+```
 
 ## Contributing
 
-See the [contributing guide](https://github.com/Chocobozzz/PeerTube/blob/master/.github/CONTRIBUTING.md).
-
-See the [server code documentation](https://github.com/Chocobozzz/PeerTube/blob/master/support/doc/server/code.md).
-
-See the [client code documentation](https://github.com/Chocobozzz/PeerTube/blob/master/support/doc/client/code.md).
-
+See the [contributing
+guide](https://github.com/Chocobozzz/PeerTube/blob/master/.github/CONTRIBUTING.md)
+to see how to contribute to PeerTube. Spoiler alert: you don't need to be a
+coder to help!
 
 ## Architecture
 
-See [ARCHITECTURE.md](https://github.com/Chocobozzz/PeerTube/blob/master/ARCHITECTURE.md) for a more detailed explication.
+See [ARCHITECTURE.md](https://github.com/Chocobozzz/PeerTube/blob/master/ARCHITECTURE.md) for a more detailed explanation.
 
 ### Backend
 
-  * The backend is a REST API
-  * Servers communicate with each others with [Activity Pub](https://www.w3.org/TR/activitypub/)
-  * Each server has its own users who query it (search videos, where the torrent URI of this specific video is...)
-  * If a user upload a video, the server seeds it and sends the video information (name, short description, torrent URI...) its followers
-  * A server is a tracker responsible for all the videos uploaded in it
-  * Even if nobody watches a video, it is seeded by the server (through [WebSeed protocol](http://www.bittorrent.org/beps/bep_0019.html)) where the video was uploaded
+  * The backend is a REST API.
+  * Servers communicate with each others with [Activity
+    Pub](https://www.w3.org/TR/activitypub/).
+  * Each server has its own users who query it (search videos, query where the
+    torrent URI of this specific video is...).
+  * If a user uploads a video, the server seeds it and sends its followers some
+    metadata (name, short description, torrent URI...).
+  * A server is a tracker responsible for all the videos uploaded in it.
+  * Even if nobody watches a video, it is seeded by the server (through
+    [WebSeed protocol](http://www.bittorrent.org/beps/bep_0019.html)) where the
+    video was uploaded.
 
 Here are some simple schemes: