matplotlib Code

Fix formatting display bug.

Removing test code

Fix handling of def/undef macros

Fix wxagg building for earlier versions of wx

Fix wx check and build

Earlier versions of pygtk don't have a pygobject version

Don't import commands if running on Windows

Refactor distutils script to display information about the extensions
being built. Use pkg-config to find freetype if possible.

The matplotlib._isnan module removed (use numpy.isnan)

revert r3512, which broke on Mac