OpenGL Color Tutorial Version 2.0

Hey Everyone,

I have now rewritten the OpenGL Color tutorial, therefore Version 2.0 is up. That makes 5 tutorials rewritten so far.

Also, remember to vote on the tutorial you would like to see next, the Framebuffer tutorial is coming first with almost 50% of votes, with the GLSL tutorial coming second with about 30%.

Cheers,
Swiftless