Missing semicolons and similar JS stuff
Fix Book/Prebook button in room details
Avoid global JS vars
Some python/import optimizations
Fix flexible days validation for daily booking
Make BR state enum picklable

otherwise db log pickling fails
Added notification task for upcoming occurrences
Fixed json decode not deserializing strings
Fixed DisplayTZ outside of request context
Scheduler now commits on Postgre
Added OccurrenceNotificationsTask in the migration

* The script also removes references to old RoomReservationTask in the scheduler
Fixed link to book a room from map of rooms
Post-WIP fixes
Added warning for conflicts in booking pages
Fixed datepicker wrong days in advance limitation

Caused due to the fact that the widget adds max_advance_days to the
maximum date, therfore it's one day later than allowed.
Improved interface in booking pages

Videoconference options are hidden when not needed
Shorter wording for some elements
Removed unnecesary CSS class
Fix ugly text in rb map widget
Post-rebase fixes
Removing some unused code
Migration: is_cancelled instead of is_sent...