minor hmrn imaging edits

HMRN imaging - more

imaging issues - changed some dbix methods from query() to select(); moved imaging from a subset of hmrn_data.params to hmrn_data; completed conversion to follow-up scanning data

patched make_chart() method to eval makeChart() to capture error for log; edit imaging data; moved staging data tt block to nodal & extranodal tt for sharing

changed patient demographics fields from optional to mandatory for hmrn_demographics validation

added new validation constraint get_hmrn_param_constraints() - enables DFV validation of int & decimal HMRN data types so can reject invalid data

new screen_category table; moved screens 'type' col to category_id; modified all screening terms & screening tests admin functions to accomodate new screen_category table; removed ajax validation from screen description & lab test field_label as these use 2 & 3-col unique keys so can't be validated by AJAX; email reports function uses users secure email address as sender; modifed portal_access function to supply SHA1 hash of current date - so failed login not sent back to portal page without explanation; modified mail_reports.pl to use item names instead of table id accessors

HMRN post-code at diagnosis also needs updating during original demographics submission; added validation to HMRN post_code_at_diagnosis value

added hmrn.patient_post_code to hold value at diagnosis (in case it changes as Outreach patient); added function to display & edit hmrn post-code at diagnosis

more minor bugfixes to new HMRN GP function

bugfixes to new HMRN GP function

added GP menu to HMRN demographics section; fixed more circular refs in C::Report::outreach() callbacks

outreach pack labels worklist; new C::Outreach::demographics()

new C::Report::_get_outreach_data(); new M::Outreach & outreach templates; updated core_data

HMRN treatment validation checks end_date not before start_date; protected Utils::to_datetime_using_datecalc() DT object creation with eval in case Decode_Date_EU fails eg if using validation FV_and()