Upgrade richard to 0.2

Upgrading richard to the newer version assumes the following changes:
* Upgrading django to 1.6
* Switching the template engine from jinja back to django
* New REST API (backed by django-rest-framework)
* Minor code tweaks
Please, no unicode_literals, they're evil.
See https://github.com/PythonCharmers/python-future/issues/22