Include NullBooleanField in BooleanField fix
Include NullBooleanField in BooleanField fix

--HG--
extra : transplant_source : %FC%11%18%B8%CB%CDjm%5B%E3%17%92%3A%E9h%C8%0C%02%27%82

philipn/django-south,philipn/django-south,RaD/django-south,RaD/django-south,RaD/django-south,nimnull/django-south,nimnull/django-south