Box2d scratch Basic movement
Basic usage of class, objects and constructors : Files Main.java & Alien.java
Array of Aliens (Without rectangles)
WIP 4 - I think
Merge remote-tracking branch 'origin/master' into ScratchBox2D

Conflicts:
	core/src/com/mygdx/game/Camera.java
	core/src/com/mygdx/game/Main.java
WIP 4 - I think