* GameController.java now creates Heartbeats and handles Trains
* Added some methods and properties to some model classes
* Moved Train and TrainDestination to model/impl
Merge branch 'master' of https://github.com/Timalkemade/playful-octo-bear

Conflicts:
	src/main/java/nl/sest/gamejam/model/impl/Model.java
Repaired Merge