Added rb file extension

The rb file extension was missing. huzzah.
Merge pull request #20 from simonmorley/master

Added ".rb" extention to the authy generated migration file.
Implement the disable authy action

- added the POST_disable_authy action to controller
- Added the {resource}_disable_authy route. Eg: user_disable_authy
- Added tests
Fix issue with devise recoverable module #23

Override the sign_in method in passwords controller, if the user has
enabled 2FA do nothing because we need verify the authy token.
Merge remote-tracking branch 'origin/recoverable'
Version 1.5.2
Delete user from Authy API

When the user disable Authy Two Factor Authentication, delete the user
from api and disable 2fa in the database
Bump version to 1.5.3
Merge remote-tracking branch master into enable-account-locking