New model functionality, better forms and views.

Separate phone and email contacts, add verification of contact
information, improve views and forms.

Also squash migrations in the alerts app.

URLs for editing contacts and notifications were defined, but the
view functions just returned 404 responses.  So what's the point
in having them at all?

updating flash messaging for contact/notification creation to use django message middleware rather than session

There are two base templates here.  One with logos on top, one
with them in the footer.  Need to decide which to use befmore pushing live.