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;

1 files changed, 30 insertions, 16 deletions

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.