modify Identify to use the new date format in the index, and to limit to only records in_doaj
update list sets, replacing = with ~ in setspec, and limiting to only sets with records which are in_doaj
tweak the date normalisation function; still pretty basic, though
update list records implementation to use new dates.  We are now harvesting based on last_updated date.  This fixes the various date range issues that the previous model had
minor bug fixes; this puts us in a position where the pmh endpoint appears to be fully working for journals, and ought to work for articles, pending a data model enhancement
fix merge issue with settings - minor