implemented iteration 2 methods in RentalCenterController and it's
interface
added interface methods and started working on implementation in
Equipment

removed EquipmentFlag enums, switched to constants
started implementing methods in RentalCenter
Merge remote branch 'origin/Iteration2' into Iteration2

Conflicts:
	ResortManagement/src/edu/iastate/cs362/RentalCenter/RentalCenterControllerInterface.java