matplotlib Code

fixed some minor bugs related to mathtext: text
markup in new config, uncommented print statement

Use cmex for symbols that don't have any equivalent in Unicode (the
vertically sized things, in particular). Simplify fallback_to_cm
code, now that font buffers are handled differently.

Better error messages.

Add support for arbitrary angles of rotation on mathtext in Agg
backend. Uses agg to rotate the raster of the text.

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.

Add valignment = 'baseline' feature to align text by its baseline.

Remove the "markup" kwarg and rcParam everywhere and replace it with
an automatic detection of math markup.

Reduce Ps files sizes when using mathtext

Fixes bounding box bug with Agg backend.
Fixes spacing bug when using standard Ps fonts.
Reduces memory usage by not caching mathtext expressions for too long.

Fix leaks of FT2Font objects.