Interim commit for Andre
Add missing file
Putting the discussion.id in a input hidden
adapting the api url to the new pattern
Support multiple discussion, finish moving API to cornice
Merge branch 'cornice' into develop

Conflicts:
	assembl/static/js/app.js
	assembl/static/js/models/idea.js
	assembl/static/js/models/segment.js
	assembl/static/js/views/messageList.js
	assembl/views/api/tests.py
	assembl/views/backbone/views.py