def get_queryset(self, *args, **kwargs):
        queryset = super(DraftCitationAdmin, self).get_queryset(*args, **kwargs)
        return queryset.filter(processed=False)
like django's built in timesince but abbreviates units
dataset/ETHPy150Open upconsulting/IsisCB/isiscb/zotero/admin.py/DraftCitationAdmin.get_queryset--crossover with--dataset/ETHPy150Open davemerwin/blue-channel/external_apps/core/templatetags/shorttimesince_tag.py/calculate_shorttimesince