Reduce memory during rebuild by using iterator()
Reduce memory during rebuild by using iterator()

Reduce the memory used while rebuilding denorms

PetrDlouhy/django-denorm,gerdemb/django-denorm,lechup/django-denorm,incuna/django-denorm,Chive/django-denorm,simas/django-denorm,alex-mcleod/django-denorm,Kronuz/django-denorm,initcrash/django-denorm