Initial commit
Initial image for background rendering
Implemented moving segments over a static background.
Also mock class for segments.
Merge branch 'background' of https://github.com/Jokab/Bullet-Inferno into background
Cleanup
Merge branch 'background' into development

Probably fixed conflicts...

Conflicts:
	Bullet-Inferno/src/se/dat255/bulletinferno/GameScreen.java
	Bullet-Inferno/src/se/dat255/bulletinferno/model/GameImpl.java
	Bullet-Inferno/src/se/dat255/bulletinferno/model/PlayerShipImpl.java