RIGHT ONE: Archivist importing for other users manually: Steph's code, issue3263

Sorry for yet another pullrequest on this -- my local git repo got corrupted, sigh, so I have resorted to a clean repo and squashing the commits from my local branch. 

This is Stephanie's code from https://github.com/otwcode/otwarchive/pull/1459, plus test code added in https://github.com/otwcode/otwarchive/pull/1489, now with the stylesheet changes removed per sarken's request on that last pullreq.