Add resend activation functionality in controller and view

Add format validation to zip_code, phone, and email
Make email lowercase before validation/save, put spec descriptions where necessary
Add mailer and license
Remove readme
Add mail deliver functionality to seller controller for registration
Add more specs and implementation to registration mail
Add travis config
Disable spec for url
Move timestamp columns after id column, add token for login
Add pending test for login with token
Add /out to gitignore
Update dependencies