Removed TreeChangeList added to support old django versions.
Removed TreeChangeList added to support old django versions.

skirsdeda/django-treebeard,django-treebeard/django-treebeard,tabo/django-treebeard,tabo/django-treebeard,django-treebeard/django-treebeard,django-treebeard/django-treebeard,tabo/django-treebeard,skirsdeda/django-treebeard,tabo/django-treebeard,skirsdeda/django-treebeard,skirsdeda/django-treebeard