Add another alternative to the sort using auto_now_add issue in the docs.
Add another alternative to the sort using auto_now_add issue in the docs.

albedoweb/django-treebeard,velfimov/django-treebeard,albedoweb/django-treebeard,velfimov/django-treebeard,albedoweb/django-treebeard,velfimov/django-treebeard,velfimov/django-treebeard,albedoweb/django-treebeard