I can undelete a number of Things at once
        
          Summary: The capstone of the Archive project: given a list of deleted Things, I should be able to undelete all of them.
This may already work, but it isn't tested.  The question is, given a List of OIDs from _listDeletedThings(), can I feed that list into _undeleteThing() and have them all poof back to life?  Let's see...