matplotlib Code

Slight speed improvement in draw_quad_mesh.

Render all the fonts in each mathtext expression to a single image buffer
(memory and time savings).
Add support for getting raw image data for mathtext expressions.
Add mathtext_wx.py example showing how to put mathtext expressions
into controls.

fixed a line collection rounding bug in agg that caused strange bugs when path lengths were 0

some support for path based clipping

added scale free ellipse to agg

fixed bad swig version problem

plugged copy from bbox leak

plugged copy from bbox leak

exposed to_string for buffer_region

applied paul and alexes pcolor quad mesh faceted patch