added register controller.
made some changes to Customer,Passenger,Clerk controllers
Merge branch 'HEAD' of https://github.com/euniciaruiz/flightReservationSystem.git

Conflicts:
	target/classes/pushtest/AirplaneController.class
	target/classes/pushtest/PassengerController.class
	target/classes/resources.class
Merge branch 'HEAD' of https://github.com/euniciaruiz/flightReservationSystem.git