changing all boolean defaults to None to ignore annoying Django 1.6 upgrade notices
changing all boolean defaults to None to ignore annoying Django 1.6 upgrade notices

Ecotrust/PEW-EFH,Ecotrust/PEW-EFH,Ecotrust/PEW-EFH,Ecotrust/PEW-EFH,Ecotrust/PEW-EFH,Ecotrust/PEW-EFH