matplotlib Code

Put in changes that for some reason SVN was not seeing in my local copy. Problem reported by Stefan

minor change to mplconfig module

bar plotting patch by Michael Forbes

remove a print statement in mplconfig

install matplotlib.conf in mpl-data for config package

Improve vertical alignment of large delimiters and n-ary operators.

Fix mathtext bug when svg.embed_char_paths is False

Fix numpification typo affecting mathtext output with Cairo backend.

Improving spacing operators.

minor changes to traited configs