Added people and elevator movement

People and elevators move together now. The elevator controller takes
requests and gives them to a specific elevator.
Merge branch 'master' of https://github.com/chriskurn/SE350

Conflicts:
	src/building/Building.java
	src/building/common/Floor.java
	src/building/common/FloorImpl.java
	src/building/common/Person.java
	src/building/common/PersonImpl.java
	src/elevator/common/Elevator.java
	src/elevator/common/ElevatorImpl.java
	src/elevator/control/Callbox.java
	src/elevator/control/ElevatorController.java