Implement "update" mode for the release importer
It would be a nice feature to be able to use the release importer to update items that are part of an earlier release with new annotations without creating new items.
If we have this we could make a single release from the production server that is used both for creating a new "major" version release and updating older releases.
The release importer would of course have to be executed multiple times, one time each for the older releases and one time for the major release.
One issue that needs to be solved is what to do about files on the release archive file server. Since no new items are created we could of course point to the existing directory that is associated with the older release and be sure that no files are missing. But some items may have been removed since the old release so we should really have a copy with links to only the remaining items.