Forms: Add fields listing to all ModelForms

refs #7305

Django 1.7 no longer defaults to fields being everything because that
is a security risk. Add explicit specification of fields to all
ModelForms.
Update WSGI, manage.py for Djange 1.7

refs #7305
Models: Set defaults on BooleanFields

refs #7305
Django: Update to 1.7

refs #7305

Update Django and Tastypie versions. Update test runner default to
suppress warnings. Update all client scripts to initialize Django
before using the ORM.