streamline handling of masked values in Path.__init__
Fix exception with maskedarray branch of numpy (Thanks, David Huard)
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).
