Switched template loading from Template.loader to philo.loaders.database.Loader in keeping with Django's recommended way of implementing loaders. Note that the origin of the template is considered to be the actual instance instead of a path, as this seems more strictly accurate. The instance is converted to unicode by the loader to more correctly fit the expected "display_name". Removed origin and django_template properties from templates. Corrected a minor error in the node_url templatetag for contexts not containing 'node'.