changed tie-breaking in code pairs so placements and removals that happen close togther are assumed to be removal-then-placement
changed tie-breaking in code pairs so placements and removals that happen close
togther are assumed to be removal-then-placement

tectronics/dicom-sr-qi,mcstrother/dicom-sr-qi,tectronics/dicom-sr-qi,mcstrother/dicom-sr-qi