Added crash handling test for production.
General code cleanup.
ActionMailer configuration.
Revised code and added tests for callbacks.
Modified venue loading script to skip un-geolocated businesses.
Revised indexing and validation for uniqueness of Friendships.
1. Bare implementation of invitation emails.
2. Start building up seed data.
3. Fixed pagination view and routing bug.
4. Revised indexing and validation for uniqueness of Invitations.