matplotlib Code

fixed cbook.flatten so its docstring example works
Previously, flatten(('a','b')) triggered infinite recursion.

Enhancement to Axes.spy, and bugfixes:
figlegend was not plotting markers;
plot could not handle empty input arrays.

added robinson and cyl tests

more fixes for warpimage and cylindrical projections.

fix warpimage/bluemarble methods for 'cyl','robin','moll' and 'sinu' projections.

fixed bug in PrintoutWX--thanks to Ziwen Fu

Import quad2cubic from mlab, not the nonexistent numerical_methods

Fix double rendering when saving PNGs with Agg backend.

minor typo

Separate drawstyles and linestyles for lines