openGL particle-files added, still not used
Merge branch 'Linux' of https://github.com/CarlRapp/Agile into Linux

Conflicts:
	Breakout/Breakout/Graphics/OpenGL/GLGraphics.cpp
Merge branch 'Linux' of https://github.com/CarlRapp/Agile into Linux
Merge branch 'Linux' of https://github.com/CarlRapp/Agile into Linux

Conflicts:
	Breakout/Breakout/ComponentSystem/System/PhysicsSystem.cpp
Merge branch 'Linux' of https://github.com/CarlRapp/Agile into Linux
openGL updated to better handle multiple shader programs