[PyQt] Almost done with the switch to SIP

[Jim Crowell]

I'm about 80% through converting the Python bindings for Syzygy
(cross-platform, PC-cluster VR, www.isl.uiuc.edu/syzygy.htm) from SWIG
to SIP. The source is about 40% smaller, much more readable, and
framerates are noticeably higher.

SIP rules.

-Jim C.