bugfixes - M::Roles::Outreach::calculate_pack_return_date() was updating original pack_due date when adding 1 month; outreach questionnaire still required kgs or stones for weight - now both optional; imatinib chart plotted single data point - now checks for valid previous results, not just previous records}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1403 4177bd82-f056-0410-812d-caef170e3fa0