various changes

Sorry for the multiple changes here, but I suspect they won't affect you.

Do you use -wdr mode? If so one significant change is that it now unwithdraws things that are in irods, so you can't manually set withdrawn=1 in the database to hide lanes. If this is an issue I can make this unwithdraw behaviour another option.

The other changes are about getting the public_name out of the warehouse for use as individual alias, and getting it to notice important metadata changes and update them in VRTrack in -u mode.