New transaction api in Django 1.6
Fix the URLs for django 1.6
Removes the deprecated markdown tag and uses the newly added rendered_body property on BlogPost
Pull all admin related code out.

Fixes #121

Conflicts:
	urls.py
Changes for new models
Reduce number of potential queries for headers
Make front page look nicer
Push it
New models are ready for prime-time, still need to fix up views