ref(controller): move permission classes
test(controller): verify that admins are gods
chore(controller): update django-guardian to 1.2.4

https://github.com/lukaszb/django-guardian/compare/v1.1.1...v1.2.4
Merge pull request #1736 from bacongobbler/admin-as-a-god

test(controller): verify that admins are gods
Merge pull request #1743 from mboersma/update-django-guardian

chore(controller): update django-guardian to 1.2.4