Initial attempt to make Python3/Django15 compat

Hey,

I wanted to use ``importd`` with Python 3/Django 1.5 but *fhurl* is one of dependancies so I figured to start with that.

The plan is to add proper testing (unittests, mainly as it's more standard way to test Django apps and tracebacks are much more meaningful), ability to actually run tests (couldn't run bootstrap - it complained about too old version) and add ``tox`` support to test against multiple Python/Django combinations.

Let me know if you are interested to pull those changes at all so I won't spend hours in vain ;-)