Changed date thingy, guest thingy, free rooms thingy.

Changed so you an arrive on some1s departure date
Changed so guests has a status field were you can see if they are arriving, leaving or checked in.
Changed so you get a list of rooms to choose from when checking for available rooms
Fixed some Calendar date things that was annoying. 
Added one or two tests
Merge branch 'sprint1_updates'

Conflicts:
	src/dataSource/ReservationMapper.java