Log Message:
Update py-matplotlib to version 0.83

Added Mark Athen's 'scale' patch, so that on a scaled axis a circle
looks like circle. See help(axis).

New cursor and span selector widgets

You can use use matplotlib event handling to register a callback after
figure draw using 'draw_event' which calls the callback with a
DrawEvent instance

Use 'f' to toggle full screen mode in the GTK backends.

Steve Chaplin has made numerous updates to the GTK and SVG backends.

Reorganized config files

Updated agg_test.py to demonstrate curved paths and fills.

Upgraded pyparsing and applied Paul McGuire's suggestions for speeding
things up. This more than doubles the speed of mathtext in my simple
tests.

Bugs fixed / small features

What's new in matplotlib 0.82

Subplot configuration
GUI neutral widgets
Exposes line cap and join style via new rc params and Line2D properties
All Axes properties are now exposed via kwargs

Small bugfixes and features

What's new in matplotlib 0.81
TeX support
Masked arrays
Much faster image loading for MxNx4 or MxNx3 UInt8 images.
New image interpolation options
set deprecated
New scalar formatter
Bug fixes