Merge pull request #51 from ireynolds/user_registration

User registration models
Merge branch 'master' into user_registration

Conflicts:
	sim/settings.py
Updated user profile model to avoid redundant database fields. Gave signal receiver a descriptive name.
Implemented home-page behavior for moderators. Minor tweaks to user_registration model rendering. Added admin configuration to user_registration
Merge branch 'user_registration' of https://github.com/ireynolds/sms-immunization-manager into user_registration

Conflicts:
	sim/settings.py
Merge branch 'master' into user_registration

Conflicts:
	sim/settings.py
renamed UserProfile model to ContactProfile