Huge refactor - so that sip-core mapping from uploaded sips can happen
Name-wise, fileName has become datasetName everywhere.  StringHandling added on the server side.
StartSaving now has an optional bunch of SipMapper objects.
RecordDb enforces that all record databases have a prefix, default is "verbatim" when there are no SipMappers.
Publication now has oaipmhPrefixes instead of oaipmhPrefix (that is, multiple) which is used to determine what the saver saves.
Harvesting to verbatim record dir, and prefix riding along with resumption token.