Set EmailUser.Meta.swappable to 'AUTH_USER_MODEL'
Set EmailUser.Meta.swappable to 'AUTH_USER_MODEL'

Without this set creating a custom user from AbstractEmailUser models
would not validate when using Django 1.6c1. Django 1.5 was no problem.
Should this reported up stream?

Signed-off-by: Simon Luijk <088e16a1019277b15d58faf0541e11910eb756f6@simonluijk.com>

bopo/django-custom-user,igorgai/django-custom-user,andresriancho/django-custom-user,dragonfly-science/django-custom-user,jcugat/django-custom-user