added padrino-mailer as dependency.
configure mailer.
configured a basic mailer to send an email.
generate a salt/token for each user.
password reset mailer with associated mutations.
password controllers with specs. no views yet.
some renaming and specs.
added views for password recovery.
changed the mail copy.
like to reset in login page.
Merge pull request #129 from noted/42-forgot

now able to reset passwords.