Changed HUD to instead directly take a HeroModel. Also follows player around
Merge branch 'hud' into dev

Conflicts:
	src/se/chalmers/tda367/group15/game/controllers/GameController.java
	src/se/chalmers/tda367/group15/game/controllers/HUDController.java
	src/se/chalmers/tda367/group15/game/views/HUDView.java