new function to view similar usernames during new user registration; ability to edit diagnosis change error requires reporter priviliges

added function to edit request diagnosis error via audit resource

commited changes to production server, made during report refactor on dev box - changed method of retrieving data for chart from screened_as to requested lab-tests; outreach CML patients use same chart as for Imatinib monitoring; activity_data.pl replaces default unknown dates< 1900 with NULL entry; bugfix to audit/revised_diagnosis.tt for users with 0 requests reported during selected duration

patched search constraints error - date_before/after -> all_before/after + validation definition; changed some instances of User::get_user_details to User::get_user_by_username in controllers; added 'query_args' to get_page() js function in date_constraints.tt to allow eg sort_by params to be passed to date constraint constructors

modified diagnosis revisions to group by reviser & reporter

moved M::Chart::get_sql_with_constraint() and _get_search_constraints() to M::Roles::DBIxSimple for code shart between M::Chart and M::Audit; replaced C::Chart::_get_chart_title() function with __PACKAGE__constraint_title, set in M::Roles::DBIxSimple::_set_chart_constraints()

refactored date constraints templates for charts & audit/stats functions into new date_constraints.tt + form2queryparam.js files; new audit functions