Pull all admin related code out.

Fixes #121
New models are ready for prime-time, still need to fix up views
Added requirements.txt
Bitfields everywhere
User get_many() for headers
Remove reject-html option
Use new models to grab email body

Fixes #126
Clean HTML messages
Completely remove contact code

It was ugly and we want a separate app for it
Remove old inbox generation code in views
Remove references to contact page that doesn't currently exist.
Increase number of inboxes shown on the user home page
Improve tag construction code for displaying
Fixens requirements.txt
Fix some syntax errors and typos
Convert views to class based views
Create EmailView, combine with delete view. Also, remove evil tabs
Split inbox address in urls.py to take advantage of the speed of regex
Initial stab at list view of inboxes
Finish off inbox views