Changelog:
 - added get route with num_msg and first
 - can now post messages
Backbone architecture with models, views and collectionsviews. Issues with dependencies and code organisation still pending.
Working prototype with fetch + display of chatroom list
New architecture:
 - CollectionViews:
   - Chatrooms
   - Chatroom
- Views:
   - MetaRoom
   - Message
- Models:
   - MetaRoom
   - Message
Added router. Probably still lots of bad practices, but at least
/chatrooms and /chatroom/:id work
Added button to send messages
Changed triggers to only call addOne when adding a new message
Merge branch 'feature/backbone_basic' into develop
Release notes
Merge branch 'release/0.12'

v0.12, with working chatrooms and chatroom views