Add a simple profile picker

migrations/versions/546912a5c987_.py

trurt/__init__.py

trurt/account/login.py

trurt/manage.py

trurt/models.py

trurt/service/__init__.py

trurt/sso/__init__.py

trurt/sso/forms.py

trurt/sso/profile.py

trurt/sso/saml.py

trurt/sso/templates/sso_pick.html

trurt/sso/templates/sso_redirect.html