GLU support added to gljava(opengl) binding

I've happy to announce that GLU support has been added to the opengl binding. Its is fully implemented _except_ for functions which involve a callback.
- gluNurbsCallback
- gluNurbsCallbackData
- gluNurbsCallbackDataEXT
- gluQuadricCallback
The rest of the functions are all available.
- gluTessCallback