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
Fixed. Please see https://github.com/sergeii/pyvideo.ru/commit/bcc8a9570662263ae1877f1996bc755bd1e3d9a2