matplotlib Code

check for nonuniform grid spacing when using inter='linear' in griddata.
update griddata_demo.py (negative seeds not allowed in numpy svn mtrand)

add 'interp' keyword to griddata. Can be set to 'linear' to get faster
linear interpolation using Delaunay package. Default is 'nn' (natural
neighbor).

Improved boilerplate.py so that it generates the correct signatures for pyplot functions.

Add translucent legend example from John Hunter's mailing list example.

fixed Axes.step docstring per sf bug 2823304

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

Remove swig fossils remaining from old version of agg wrapper

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

Add merge tracking to the mathtex branch.

initial submission of the annotation guide.