Move event-related models from 'cof' app to 'gestion' app.
Add 'Association' model to register name, related groups (buro,
members), etc.
Club is now associated with a single Association instance.
Migrations take care of these changes.
- The login views are in `gestion/`
- The templates are under `gestion/templates/gestion/`
- `cof/shared.py` moves to `gestion/` and is splitted into 3 files:
- The auth backends are in `backends.py`.
- The context_processor is in `context_processor.py`
- The LOCK/UNLOCK functions remain in `shared.py`
- remove is_buro from the database in the same way we did for is_cof
- make a decent migration that *SHOULD* take into account is_cof for old
databases. note, this has been tested only through unittests.
- make unittests pass again accordin=gly fixing views.
Note: we should make a method for filtering with specific group members,
something like
map(lambda x: x.profile.cof, filter… group…)
