Added code to FloatingEntity update to track potential collisions.
Added code to detect MotherShip-MotherShip collisions.

Will add to this later. Need to switch back to development for a sec.
Interim commit to add issue43 to develop.

I added bounding boxes to server-side entities as part of developing
issue43. This should save everyone a lot of time in collision detection
so I'm going to stop and do a push.
Merge branch 'issue43' into develop

Conflicts:
	atlantis/src/atlantis/AtlantisEntity.java
	atlantis/src/atlantis/MotherShip.java