[bug 971014] Upgrade to django 1.6

Well, I think this is it!

* I had to change some strings that get passed into `_lazy` to be `unicode`.
* The password reset code form had to change to match the latest version in django.
* The TransactionMiddleware is now deprecated and it's behavior is the default if you set `ATOMIC_REQUESTS = True`. So I did that.

r?