Add Module: Password Theft

[passbe]

Some methods are listed here:
http://jeremiahgrossman.blogspot.com/2010/03/password-managers-is-this-best-option.html

Google Code Issue: http://code.google.com/p/beef/issues/detail?id=549

[bcoles]

A module has been added in commit d5dd4f4

This module works on Firefox only and fails if the user has saved more than one set of credentials for the domain.