add Visual Studio Debug/Release directories
Add cube map face enums to list of valid texture targets

Add these enums:

GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
GL_TEXTURE_CUBE_MAP_POSITIVE_Z, GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
Add .opensdf to git ignore list
add ipch folder to .gitignore
fix size of index2Enum array to match change in previous commit
Merge branch 'master' of https://github.com/jra101/regal into jra101