matplotlib Code

Fix support for hatches without color fills to pdf and svg backends.
Add an example of that to hatch_demo.py.

Add the PDF backend to the mathtex family. Resistance is futile.

Remove swig fossils remaining from old version of agg wrapper

Port the GDK backend over to mathtex.

Port the AGG backend over to mathtex. More testing still needed.

mplot3d: add bar3d, improve z-sort, hist3d example

Add merge tracking to the mathtex branch.

Creating a branch for mathtex integration.

initial submission of the annotation guide.

axes_grid : minor improvements in anchored_artists and inset_locator.