ogl: fix signed vs unsigned comparison warning
ShaderGen/D3D: inline centroid
ShaderGen: merge early-z blocks of ogl+d3d
ShaderGen: use cbuffers for D3D
ShaderGen: inline constant shaders
PixelShaderGen: drop fmod as it isn't used any more
PixelShaderGen: extract iround
ShaderGen: make clipPos readonly
ShaderGen: OGL: don't make a copy of "Normal"
ShaderGen: make uv readonly
Merge pull request #185 from degasus/shader-cleanup

Shader cleanup