Added support for Box2D, got basic movement more or less working
Some conflicts, how that happened, I'm just terrible at this.

Conflicts:
	core/bin/com/travelingmaker/preparance/GameScreen.class
	core/bin/com/travelingmaker/preparance/Main.class
	core/bin/com/travelingmaker/preparance/Player.class
	core/src/com/travelingmaker/preparance/GameScreen.java
	core/src/com/travelingmaker/preparance/Main.java
	core/src/com/travelingmaker/preparance/Player.java