Fix compatability with Django1.8/1.9
Fix compatability with Django1.8/1.9

Django 1.9 changed global_settings.TEMPLATE_CONTEXT_PROCESSORS to a
list. We cannot join a list and a tuple.

lukaszb/django-guardian,benkonrath/django-guardian,benkonrath/django-guardian,benkonrath/django-guardian,lukaszb/django-guardian,rmgorman/django-guardian,rmgorman/django-guardian,rmgorman/django-guardian,lukaszb/django-guardian