matplotlib Code

Small fixes to mathtext2.py in order to keep up with the changes to the mpl-data dir.

Changed ft2font.get_charmap so that it now returns a character code->glyph index dict, instead of the reverse as it used to return; updated all the files where get_charmap is used

applied Nic Youngs ps dpi patch

mathtext2 - added support for complex sub/superscripts (i.e.fractions etc.)

Initial support for complex fractions. Also, rendering is now completely separated from parsing. The sub/superscripts now work better.

Added matplotlibrc key "mathtext.mathtext2" (removed the key "mathtext2"). Minor changes to __init__.py, mathtex2_demo.py.

Added initial supprort for fractions, (and rendering of lines)

Begun work on mathtext2.py (already a lot down the pipe). Also my first SVN commit, ever, so beware.