dashboard and status query display tweaks

bugfix for request status filter not passing duration param

provided sample type filter on request status worklist

greyed-out numerical display in dashboard summary if count = 0

bugfix to nhs_number compliance audit - query required rquest to be in clinical trial - should be 'trial_name IS NULL OR trial_name NOT IN (..)'; added summary section to dashboard request status

patched drilldown tooltip js to supply encoded query params instead of path args to cope with a slash in test name (eg CCND1/IGH), interpreted as an arg delimiter by dispatcher

linked dashboard highcharts histograms to outstanding tests table;

more dashboard view presentation edits

dashboard view presentation edits

bugfix to check_date_is_valid - FormValidator::Simple didn't detect yr = 19.7 is invalid; supporting tests in validation_profiles/search.t; jquery.timeago function for dashboard view

bugfix for dashboard view - IE8 can't cope with trailing commas after data arrays

bugfix in quick_search_constraints() for 'variable masks earlier declaration in same scope'

replaced individual section highcharts with drilldown view in dashboard

first draft of dashboard view; first draft of quick search but not able to share find_requests() with main search as we need 'AND' not 'OR' logic; combined _process_tests_complete() logic with _get_request_status_query_args() for tests_completed; moved jquery version from 1.4.2 to 1.8.2; moved devel server to port 8000

minor adjustment to _get_previous_requests(); new cols on xna extraction worksheet