Update models.py
Update models.py

corrected according to https://titanpad.com/freedomcoopmemberform
FreedomCoop/valuenetwork,django-rea/nrp,django-rea/nrp,django-rea/nrp,FreedomCoop/valuenetwork,django-rea/nrp,FreedomCoop/valuenetwork,FreedomCoop/valuenetwork