only adds Tribe is Person didn't  have that information; fixes wrong loading of "sate_start_uncertain" and "date_end_uncertain";
only adds Tribe is Person didn't  have that information; fixes wrong loading of "sate_start_uncertain" and "date_end_uncertain";

--HG--
branch : dprr-168

kingsdigitallab/dprr-django,kingsdigitallab/dprr-django,kingsdigitallab/dprr-django,kingsdigitallab/dprr-django