added request_specimen_detail table to get_single_request() method for displaying specimen_taken date on tt view, as request_report_view requires request to have been reported
added datetime specimen taken to registration and print_view pages; removed CPA icon from report display (interferes with messaging lionks); changed colours on additional comments display
removed request_gross_description from app; added request_secondary_diagnosis definition; replaced underscores with spaces in history display; morphology and comment optional displays in request summary view; more tests in report.t
refactored request_report table again - replaced 'vertical' request_specimen_detail and request_report_detail tables with conventional 1-2-1 mapping with request table
histology block refs displayed in year groups; changed date ref to 16 char string for recorded delivery info; returned list of records updated instead of redirect to redisplay block ref worklist
record summary displays previous doi warning if previous doi but not current record; outreach questionnaire fixes; new diagnosis validation - submission of sub-category requires icdo3
