Scheme OpenGL bindings

[Scott Owens <sowens@cs.utah.edu>]

I have implemented OpenGL bindings for mred.  Get a preliminary version
from www.cs.utah.edu/~sowens/sgl.tar.gz.

These bindings currently support most of OpenGL version 1.1.
To use them you will need a v200 mred/DrScheme with OpenGL support in the
canvas% class.  These bindings are known to work on FreeBSD 4.5 and are
known to not work on IRIX 6.5.

If you use the bindings, I would appreciate some feedback on your
experiences with it, especially if you are using a platform not mentioned 
above.

-Scott Owens