HMRN data collection templates; extended HMRN potential new malignancies function to include known previous diagnoses list; renamed M::HMRN::Data::all_diagnoses() to all_icdo3_diagnoses() & modified for use with M::HMRN::get_previous_diagnoses()

moved M::HMRN::get_all_hmrn_data() procedures to M::HMRN::Data Role