patched C::Result::do_export_test_results() to only split $vars{category_id} if var supplied; added specimen type and result summary to export test results function; added specimen to unscreened.pl script
fixed Dispatch error_document - was passed in args_to_new by mistake; added 500.html error document for Apache; added new 500 error test to Resources/Test
C::Result::preview_datafile() callback function to load flow data PDF; moved @skip_orgs list from activity_data.pl & national_code_unknown.pl into cron settings.cfg
