specimen date editable in request_edit; FormValidator::Simple date validation switched to datetime to handle specimen date

patched C::Patient::_personal_demographic_service() to supply flag for tt to skip PDS lookup for edits to anonymised patients (HIV, etc); combined some SessionStore methods into generic session_store_hashref() method

changed user workload stats methods to store data in session to speed up chart generation, also changed (broken) RDBO method to dbix method - results should be correct now; quinitiles data bugfixes

enabled printing interim reports for Outreach cases; patient edit data now submitted to PDS

stored succesful PDS return (SMSP-0000) in session to save repeat lookups

general tidy up and bugfixes

modified M::Audit::turnaround_times() and more chart functions to accept arrayref of screening terms; modified C::R::SessionStore::session_store() request_options data format (was incorrect format); bugfixes to M::Roles::RequestUpdate::do_trial_number_update(), MRRU::do_request_options_update(), MRRU::do_request_consent_update() and M::Patient::merge_patients()

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