If you like filmmaker Elia Suleiman, you will like It Must Be Heaven.  This may well be an unusual start to a review, but this is not meant for the fans, because they already know what they are getting into.  For the rest of you, how would one go about describing a Suleiman film?  Well, Suleiman is a rare filmmaker: he is a Palestinian who is less concerned with doom and gloom, preferring to speak…