fix tangent calcs and redone normal mapping reducing number of varyings needed to account for lower end cards.
fix tangent calcs and redone normal mapping reducing number of varyings needed to account for lower end cards.

supereggbert/GLGE,supereggbert/GLGE,martinruenz/GLGE,supereggbert/GLGE,martinruenz/GLGE,supereggbert/GLGE