matplotlib Code

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

Allow markup kwarg in more places.

Take better advantage of numpy in quiver

Numpify quiver.py

remove trailing spaces

fixed a date_support bug

fix r3122 so that numpy doesn't emit warning (and shouldn't break Numeric/numarray)

Fix masked array handling in quiver.py for numpy. (Numeric
and numarray support for masked arrays is broken in other
ways when using quiver. I didn't pursue that.) - ADS

Docstring clarification in quiver.py; update to CHANGELOG.

Use numerix more in collections; quiver handles masked arrays.