Created a check for room availibility.

Added database queri in ReservationMapper.
Changed ReservationMapperInterface to refelect changes in ReservationMapper
Added code to controller to get and pick a availble room.
Added code to DBFacade to connect mapper and controller
Added quick test for new controller method
ReservationMapperTests added
Updated reservation form
Merge branch 'check_availbility_number2'

Conflicts:
	src/dataSource/DBFacade.java
	src/domain/Controller.java