Make shared axes work when calling Axes.axis() (Thanks Jorgen Stenarson)
Add safety check.
don't use unicode strings with usetex
backend_qt4 improvements, see bug 1288848
Apply patch by Manuel Metz to scatter docstring.
Change tabs to spaces, except in pyparsing.py
streamline handling of masked values in Path.__init__
Fix exception with maskedarray branch of numpy (Thanks, David Huard)
Fix relim again (thanks Darren Dale)
Fix relim() to properly ignore existing data. (Thanks Darren Dale).
