[Fluxus] small commits

[gabor papp]

> What are the id's for the mouse wheel? It's 4 and 5 here...
as far as i know, there are no id's for the mouse wheel on osx. it's not
supported by glut unfortunately. there's a patched glut version that
could be installed replacing the vendor provided version, but that's not
really an option probably:
http://iihm.imag.fr/blanch/howtos/MacOSXGLUTMouseWheel.html

best,
gabor