Stripe Issue #32: added support for Python 3.3
Stripe Issue #32 - added Python 3.2 to tox, fixed requirements as discussed, and took a stab at updating travis
Update .travis.yml

I forgot to add Python 3.2 and 3.3 to the list of versions tested by Travis.  They are now added, so we'll see how that works.  Currently Python 2.5 is failing under a couple of configurations, so I'll run that to ground as well when I have a chance.
fixed travis file, I expect this time to actually work
okay, travis keeps installing the wrong version of requests for Python 2.5 even when I tell it not to, so I'm going to re-disable it, since it was already disabled in the original stripe repo
fixed encoding issue for urllib on python 3 and changed assertEquals to assertEqual since the former is now deprecated
Merge remote-tracking branch 'origin/pr/33'
string.ascii_lowercase is available on all the Python versions we care about