Remove index and login apps, will be rewritten, clean up urls.py
Clean up the accounts app, will be rewritten, and django-auth-ldap will
be used as authentication backend
UserProfile is deprecated for django 1.5
accounts/urls.py will be rewritten as well
Move stuff from identity to okupy
Small fixes in OkupyError, add LoginError
Remove deprecated templates, update login template
Add login form
Remove legacy code in accounts/views with the login view only
Add authentication tests
Replace identity with okupy in manage.py
Add empty accounts/models.py otherwise the tests don't run