Python3

And here's the PR for issue #230

Sadly Travis doesn't have python3.4 yet, but I did run the tests locally on 3.4 and they all pass. So until that fateful day when they add it, we will need to make due with python3.3 in Travis.

As you can see, there is less compliance then one might have thought. The biggest thing was that dictionaries return generators now for .keys, values, and .items.

I didn't touch Tox or docs.