
Jifty::Plugin::Authentication::Password::Action::Signup - signup for an account
The fields for Signup are:
Make sure their email address looks sane
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.