added Base::is_lab_staff() method; access to lab test history now restricted to lab staff; C::Roles::DataMap::user_locations_map uses user_locations table instead of email_contacts table so that non-network users get a new diagnosis list
added user permission restrictions to resouces links; restricted resources/new_diagnoses list to users location if not lab-staff - doesn't work properly yet; changed LIMS::_debug_authen() to use LIMS::Local::Debug::DEBUG() instead of self->debug() to avoid circular ref to self in caller; added specimen description to patient summary display