Rewrite of renderer to be less deprecated.
Next commit will make it work and introduce shaders.
TODO: remove all deprecation in rendering.
Modernizing gameengine.
Fixed shader codes and enabled client state required for buffer
rendering.
Merge branch 'cleanup'

Conflicts:
	src/main/java/net/pme/GameLoop.java
	src/main/java/net/pme/objects/Shader.java
	src/test/java/net/pme/TestCube1.java
Removed warnings.