Included are my proposed changes to have a Copy/Transfer/Merge API
Changes are made to DIT, DIT3 as outlined below
1. A new entry point TRNMRGEX^DIT is added. This was done so as to not
break anything else. But I would expect that changes could be added to
existing TRNMRG^DIT and TRNMRGEX could be removed.
2. Documentation is added to code. I don't know if this will cause a code
size over run.
3. I changed expected syntax of TO IEN to match that used in UPDATE^DIE,
namely "+1," when wanting to copy record into a new record.