Initial fix for requests 2.x.

XXX This is probably not the best way to do things, and we might also really need a better fix for standalone urllib3 >= 1.x, too.
Update README.md

Missing import on django example
Merge pull request #5 from gorillamania/master

Update README.md
httreplay 0.1.6, with fixes for requests 2.x

Requests loves mucking with connection sockets. We don't love it as much.
Update README.
Python 3 support