Refactoring sign up controller
Restoring User observer as observers can be disabled in tests
Refactoring assignments controller
We send two emails on signup with a new track
Removing redundant guard config for minitest
Adding terminal notifier and lumberjack gems
Restoring user oberserver
Refactoring postman
Fixing error in email template
@User is the primary contact in the email
Manually handle observers because they don't play well together