matplotlib Code

Turn svg.embed_char_paths on by default.

fixed some minor bugs related to mathtext: text
markup in new config, uncommented print statement

added missing import statement to config/rcparams.py

Remove the "markup" kwarg and rcParam everywhere and replace it with
an automatic detection of math markup.

mathtext.* font rcParams now use fontconfig patterns to specify fonts.
Support converting FontProperties objects to/from fontconfig patterns.

rcdefaults working with mplconfig

Make rcParams.update(rcParamsDefault) when new traited config is
switched on.

add an update method to rcParamsWrapper

Fix capitalization of "Pdf", which must match that in matplotlib/__init__.py

Change mathtext.* rcParams so they accept a string which is a set of
arguments to the FontProperties constructor. This has been added to
both the classic and traits based configuration frameworks.