Bump package requirements
Remove deprecated verify_exists URLField param
Add ipython as req, use venv python for manage.py

(instead of /usr/bin/env python)
Remove workaround for _collect_sub_objects bug

Fixed in Django 1.5
Quote first parameter to {% url %} template tag
Replace deprecated reversion.revision.create_on_success
Replace deprecated generic views in url; delete unused ones URLs
Reorder imports (& remove unused)
Clean up imports
Add cssselect package to requirements

It was taken out of the main lxml package
Update to Django 1.5.1
Merge pull request #139 from editorsnotes/django-1.5

Upgrade to Django 1.5.1, bump other dependencies