Log Message:
Import Cg-compiler-1.2.1 from pkgsrc-wip.  Packaged by xtraeme@ and
updated by me.

This is the NVIDIA Cg compiler/toolkit for Linux that includes:

    o NVIDIA Cg toolkit documentation
    o NVIDIA Cg compiler
    o NVIDIA Cg runtime libraries for OpenGL
    o Example shaders written in the Cg language
    o Example applications that use the Cg runtime to manage Cg programs