Switch to a ctypes wrapper for OSX Quartz global hooks

[isolver]

Quartz is a C library, not objC. It should not be hard to wrap the neseccary API functions in ctypes, proving better flexibility and removing the pyobjc depdency. Again, if / when there is time.

Should also check to see if Alex has not already wrapped the Quartz lib in ctypes as an OSX lib file in pyglet.