Initial graphics changes

Requires glew
fullscreen broken ~ fix positioning
Add back FPS counter
Fix floating point exceptions from dividing by CLOCKS_PER_SEC

Use omp time
Merge branch 'develop' into graphics

Conflicts:
	Systems/RenderSystem.cpp
	Systems/RenderSystem.h
	worldsim.cpp
Use version 120 shaders for OpenGL 3.0
Change pixel color formats

GL_BGRA + GL_UNSIGNED_INT_8_8_8_8_REV faster transfers
Color codes are now hex 0xAARRGGBB
Render water color based on waterLevel
Merge pull request #1 from accoleon/graphics

Merge graphics changes