replace django-admin with Grappelli

[sethwoodworth]

http://django-grappelli.readthedocs.org/en/latest/index.html

From what I have read, it will make the backend editing process a lot nicer in the admin.

[sethwoodworth]

http://stevelosh.com/blog/2011/06/django-advice/#working-with-third-party-apps