fix custom auth backend from throwing 500's when upgrading a user model
Use the Http404 message
fix GenericTemplateFinder overiding views that map directly to a template or file like robots.txt
better CustomUser model support
add  template filter
Revert "add  template filter"

This reverts commit 51e29f4553dcc14935c60791f7026d4c6bf7910c.
pdb tag returns empty string
Per-request urlconf support in GenericTemplateFinderMiddleware

Django unsets the request's handler before calling request middleware
(see django.core.handlers.base:/set_urlconf(None)/), so set it again
before rendering our template.
Merge branch 'master' of git://github.com/fusionbox/django-fusionbox
Allow adding things to the context in GenericTemplateFinderMiddleware
Add generic_upload_to to db.models module