Refactor mod_python based web apps to Django based

mod_python is no longer being developer, its recommended successor is mod_wsgi. Much of the legacy web apps in NAV interface directly with the mod_python API at a low level. These systems should all be refactored to be served through Django instead, so we can be independent of the actual low-lever web server technology being used. A separate blueprint for each mod_python-interfacing web app should be created, and this blueprint should be udpated to depend on all of those.