Conflicts: CHANGELOG openslides/agenda/views.py openslides/assignment/views.py openslides/mediafile/views.py openslides/users/views.py openslides/utils/views.py tests/motion/test_pdf.py tests/settings.py
* New user model (used Django's AbstractBaseUser) * Renamed the app to users * removed person api See #861 Fixed #576 #478