monkey-patch django to use jinja2 templates for 404/500 pages and 3rd-party apps
This is heavily inspired by [http://code.google.com/p/smorgasbord/](http://code.google.com/p/smorgasbord/). But that couldn't reuse an existing jinja2 Environment, nor set filters on the Environment it created. This code assumes that you have `env` declared previously in the file as your Jinja2 Environment instance. In `settings.py`, you should set KEEP_DJANGO_TEMPLATES = ( '/django/contrib/', ) so that your Django admin still works. You can also set any other places that you do want to use Django templates there.
- templates
- jinja2