kfet.open

kfet.open app
- Base data (raw_open, last_update...) is stored and shared through cache system.
- 2 websockets groups: one for team users, one for other users.
- UI is initialized and kept up-to-date with WS.
- raw_open and force_close can be updated with standard HTTP requests.
  At this time, there isn't any restriction on raw_open view. Common sense tell us
  to change this behavior.

Misc
- Clean channels routing.
- 'PermConsumerMixin': user who sent the message is available as argument in
connection_groups method, which returns groups to which the user should be
appended on websocket connection (and discarded on disconnection).
- New kfet.utils module: should be used for mixins, whatever is useful and not concerns
the kfet app.
- Clean JS dependencies.

requirements.txt

@@ -14,12 +14,12 @@ unicodecsv==0.14.1
 icalendar==3.10
 django-bootstrap-form==3.2.1
 asgiref==1.1.1
-daphne==1.2.0
+daphne==1.3.0
 asgi-redis==1.3.0
 statistics==1.0.3.5
 future==0.15.2
 django-widget-tweaks==1.4.1
 git+https://git.eleves.ens.fr/cof-geek/django_custommail.git#egg=django_custommail
 ldap3
-channels==1.1.3
+channels==1.1.5
 python-dateutil