replace south migration with Django 1.7 migration
replace south migration with Django 1.7 migration

ademuk/django-email-confirm-la,if-then-fund/django-email-confirm-la-itf,vinta/django-email-confirm-la,ademuk/django-email-confirm-la,vinta/django-email-confirm-la,if-then-fund/django-email-confirm-la-itf