exempted Outreach report from requesting additional tests based on diagnosis; modified M::R::ScreenUpdate::do_auto_screen() to add lab test details if configured for screening term

moved auto-generated specimen-associated lab-tests function from M::Request::new_request to own method in M::R::LabTestUpdate for sharing between new request and specimen code update methods

MAJOR CHANGES: search form uses jQuery watermark instead of dd-mm-yyyy display - changed date-field validation to accommodate; moved do_new_lab_test() method out of M::Role::ScreenUpdate to new M::Role::LabTestUpdate to share function with auto-requesting tests at diagnosis/authorissation; changed 'teaching' field to radio button in report page and changed handling of report_option fields in M::Roles::ReportUpdate::do_additional_options() - all request_options were being cleared during report stage; added updated_at timestamp field in M::Roles::ReportUpdate::do_request_report() to any unchanged request_report object to trigger mail_report.pl on authorised cases - were being missed as updated_at col was not being modified