added rights for filter rooms
'clean'-methods were replaced by JsonView annotations
changed api-path
fixed bug that appeared on passing illegal date to /api/timetable/room-{id}/{date}
added 2 new api (getAllFreeRoomsByDateAndTimetable, getUserBookingsByDateRange), added check for booking/delete room by date and time (timetable), refactored jpql named queries, added time serializer/deserializer
replaced dbcp by c3p0, fixed bug (showed past bookings at available bookings)
added several new api for admin
added timetable api for admin (add/delete/edit)
added api for roomtype, added Roles constants, added booking service factory
added API for admin(Rights, Roles, Position)
Merge branch 'development-backend'