Add 3dLUT setting to CWinSystemBase (no GUI setting yet)
Switch back to YUV2RGB shader
Use limited range internally with 3dLUT
Add dithering to BaseYUV2RGBGLSLShader
Add 3dLUT to BaseYUV2RGBGLSLShader
Disable RGB range scaling for now
Disable output curves for now (keep for vcgt support)
Switch to sampling the transform