save previous versions of records
|Google Code Legacy ID:||atom-911||Tested version:|
Whenever an update is made to a Qubit object, a copy of the previous
version is kept. This will allow for comparing changes to records over
time. It will also allow for the ability to save working drafts of a record
or to create drafts for approval by a user who is authorized to review and
approve records for publication.
[g] Legacy categories: Component-Versioning