matplotlib Code

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

Add kwarg 'markup' for all text that allows the user to choose either
'plain' or 'tex' markup. A default may also be provided in the
rcParam 'text.markup'.
Minor bugfix to mathtext.py

remove trailing spaces

improved usetex to respect serif, sans-serif, monospace, and cursive rc settings

fixed agg image problem

preparing 0.83.2

fixed a tex output error problem

made new dfault config file dir .matplotlib

added hist bin fix

added autoscale_on property