MAJOR CHANGE: combined send_message and send_attachment into a single method dispatch() in L::Local::Mail - consistently returns a Return::Value object so no longer handling returns from simple mail and attachments differerntly - affects app and crons; fix for resources meter chart for swap mem on Deb6 VM; patched M::Outreach::update_followup() to prevent unnecessary db lookups for non-duration followup (eg other), and prevented crash when attempting to update non-existant table entry; moved loading of local-lib above FindBin in hilis4.fcgi to avoid fastcgi error in Deb6 VM
patched M::Roles::HistoryAction to clear actions list before sending diagnosis status alerts via cron, otherwise action list is cumulative for each successive array of addresses
new screen_category table; moved screens 'type' col to category_id; modified all screening terms & screening tests admin functions to accomodate new screen_category table; removed ajax validation from screen description & lab test field_label as these use 2 & 3-col unique keys so can't be validated by AJAX; email reports function uses users secure email address as sender; modifed portal_access function to supply SHA1 hash of current date - so failed login not sent back to portal page without explanation; modified mail_reports.pl to use item names instead of table id accessors
