Python 3.3 compatibility: fixed what 2to3 complains about, also changed force_unicode to force_text.
Fixed missing module name.
Added `templates/watson/includes/*.html` to `setup.py`.
Fixed unicode errors in JSON tests under python 3.3
Added from __future__ import unicode_literals, print_function every where except migrations/
Merge pull request #18 from tsufeki/python3

Python 3 compatibility