deprecation warnings in python2.3

I have updated matplotlib in CVS to fix the deprecation warnings for
python2.3. I have tested all of my example scripts and get no
warnings. If you would like to test on your scripts, please let me
know if you get any warnings. I plan to do a bug fix release
tomorrow, so let me know if you are having any troubles.

Anyone else who would be willing to test the CVS version on their
existing python2.2 installs before the bug-fix release, that would
also be great.

John Hunter