I've finally started to rethink the database structure. The goal I'm trying to reach: only use User objects to manage permissions and accesses to the webui and associate other objects to them if needed (like mailboxes).
see #105
* Some strings were not detected by makemessages (for example in javascript files, behind comments...). There are still some issues with that but I think I'll have to wait a future Django release.
* Support for per-user language selection is almost done.
see #166