arguments

The fields for "Signup" are:

email: the email address

password and password_confirm: the requested password

name: your full name

validate_email

Make sure their email address looks sane

take_action

Overrides the virtual "take_action" method on Jifty::Action to call the appropriate "Jifty::Record"'s "create" method when the action is run, thus creating a new object in the database.

Makes sure that the user only specifies things we want them to.