switched HTMLDOC authentication from url to cookies when requesting image for template; added ability to restrict worklists by request_number from

fixed failure to load images when report rendered as PDF - required CGISESSID param passing, either in url or cookie, HTML::HTMLDOC doesn't support cookie param (though HTMLDOC binary does), so set CGISESSID as url 'get' param

hilis3 conversion scripts for YHHN