testing needed

[Bart Botta]

Recently the official OpenGL XML spec started adding more precise type
info for the sets of enumerants accepted by various functions.
CL-OpenGL will soon start using that information in the generated
bindings, but first it needs testing to determine if the new group
info is complete enough to not break much existing code (and fix the
group info when it does).

Please test https://github.com/3b/cl-opengl/tree/dev with your opengl
code, and report any problems.
https://github.com/3b/cl-opengl/issues/92 is tracking problems with
the new groups, or you can send reports by email or on freenode IRC at
#lisp or #lispgames.

That branch also has new wrappers for GLUT menus, feedback on that is
also welcome.