If the user cancels forgot_password, the email address is pre-filled in.

* Change authenticate controller to use address info given in config options to avoid XHR delay.
* Fix the animations so that going directly to the password section is smooth.
* Update user.js->addressInfo to return the email address in the info.
* Update check_registration and forgot_password for slight consistency changes.
* Update the state machine to be able to add extra info to the current state's configuration.

close #1001