* calendar.py: remove stuff now built in time; some cleanup and
generalization in the calendar printing
* cmd.py: use __init__.
* tzparse.py: This module is no longer necessary -- use builtin time instead!
* Added whatis command to pdb.py
* new module GET.py (GL definitions from <gl/get.h>)
* rect.py: is_empty takes a rect as argument, not two points.
* Added tests for builtin round() [XXX not yet complete!]