matplotlib Code

fixed a couple of examples

fix contains() method for Lines

widgets.py: replace tabs with spaces

Fix contains() for collections, moving common code from draw() into a function

Fix str() method for Wedge artist

support unicode when printing Text artist with str(artist)

Fix contains method for inverted image axes

clipped line must recache in set_data

to_numeric requires PIL

Change to try to import md5 from hashlib, and fall back to md5. Change the uses of md5 to work with either.