matplotlib Code

Change missing header file errors into warnings, since include paths
can be inserted in sneaky ways behind distutils' back ;)

Fix some win32 differences

Change "unknown (no pkg-config)" to "found, but unknown version (no pkg-config)"

Fix erroneous message when wxPython devel headers are not even needed.

Fix order of libraries between freetype2 and zlib

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