Added dates for to twin interveiw.
-Also changed p5r2twin... apparently it's been broken for a while.
-still does not work.
The primary key of the dates table is Famid. the twin form
relies on win as well as family id.

in order to avoid breaking the dates table I had to add an extra form
'dates' before the twin form
-Also put dates and twin interview into a subcategory.