Use variable instead of getting debtor_id again
++
Prioritize todos
++
Fix ::find_by_credentials to not fail when email lookup returns nil
Add is_stub to User
Add stub methods and validations to User
Add Font Awesome
Clean up navbar
Add icon to settle button
Add #debtor_email= for stubbing new users
Remove bills sync listener
Add #parse to get past object root
Update users if new user was entered