Materials, lights and maps

New amazing features added:

Point lightsPhong model lighting (ambient + diffuse + specular)Model materials: ambient, diffuse, specualr colors, shininess, normal and specular maps.

Objects are looking pretty nice already :) Now, I want to implement parallax mapping and it will be finished first version of lighting model. I will start then working on things like postprocessing and shadows.

I have also enabled simple antialiasing (multisampling: 4 samples per framgnet), which is disabled only on screen with dragon.