added `matplotlib.style` to pyplot import list
fix url rc specification

smoothed over conflicts

add test for URL stylesheet

whoops, remove extraneous regex I added...

move test to proper location

arg, don't need urllib2 either...didn't realize functionality was in core mpl
fixed divergent naming scheme
pep8 clean up
Merge pull request #2 from tacaswell/stylesheets_clean

Minor changes to style sheets