Implemented MoveContainer method in TrainCrane.java
Crane moves to the container
Added a container variable to agv.
Switcharoo'd with backend XML
Merge remote-tracking branch 'jeroen940/TrainCrane'

Conflicts:
	src/main/java/org/nhl/containing/Container.java
	src/main/java/org/nhl/containing/Simulation.java
	src/main/java/org/nhl/containing/cranes/TrainCrane.java
Added imports for XML