Added questions around findability
Removed constraints around UKGov licence

Which licence to use is a matter of policy; for the same reason we
don't dictate a particular data catalog to publish in, we don't talk
about UKGov policy around licensing within the certificate.
Changed around privacy questions for those who are exempt from Data Protection Act
Changed wording around guarantees
Added possibility of waived/expired rights
Added waiver support when specifying licence for third-party sources of data/content