new home page (hello) link and quick search function on 'hello' page for non-lab-staff users; added optional sort_by to M::LabTest::get_section_lab_tests; added optional command-line arg to nycris.pl
modified method of determining whether C::Worklist::display() is for data entry and how return is handled; incomplete_requests have date stamp; awaiting_final_diagnosis list includes diagnosis = awaiting final review
fixed inflate_mysql_date_to_datetime() to protect against invalid dates from pre-HILIS4 data; changed prognostic_indicator test script to manipulate dob instead of diagnosis date to provide better control of age; highlight invalid age in HMRN event data table
moved part_number from optional to required for storage input validation; added multi_many_ok to search_requests_count() eg for specimen & request_summary searches - both 1-to-many fields
