FXAA GLSL implementation
Moving the fxaa shader to it's own file.
Connecting the FXAA shader to the end of the scene pipeline.
Merge pull request #5 from ArmatureLabs/master

Pull from AL
Merge branch 'master' into antialiasing
Merge pull request #23 from arturo-mayorga/antialiasing

Fast Approximate Anti Aliasing (FXAA)