Added BasicProgram stubs and documentation.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2520 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added GL args to GpuProgram and BasicProgram functions.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2521 822214bb-dcf7-4c8d-a767-17ae0fb20d88