Fix warnings on gcc 4.2.1
Fix relim again (thanks Darren Dale)
Remove an accidental printf.
Minor speed improvements in Agg backend.
remove backwards compatibility kludge for ax.get_position
make a copy of projparams dict, so original is not modified.
Speed improvements for path simplification algorithm.
Fix relim() to properly ignore existing data. (Thanks Darren Dale).
Add more debugging output to the path simplification code.
Fix bug with pie chart slices less than 2.5 degrees.
