matplotlib Code

Fix some mathtext scaling bugs
Add new mathtext symbols
Use mathtext to render math in the docs (the dog-fooding patch!)
Move PNG reading/writing to its own module and remove it from
_backend_agg and _image

applied gregors agg resample patch

Fix a number of minor issues discovered with "-pedantic"

A step towards a fast rectilinear pcolor version

SC

added bgra32 converion buffer to image

SVG options: image_noscale and image_inline

nonuniform images, scipy and setup

added nicks irreg grid image

updates to animation_bit