1.9.0

• [Feature] #203: Use Django’s supplied version of six to remove an external dependency.
• [Bug] #161: Fixed redirect loop for users without proper groups for MultipleGroupRequiredMixin and GroupRequiredMixin.
• [Bug] #181: Fixed redirect loops based on user permissions.
• [Bug] #196: Refactor how users without permissions are handled.
• [Bug] #208: Fixed errors from combining certain access mixins.
• [Support]: Added note to docs about Python and Django versions used in tests.
• [Support] #192: Added example for OrderableListView.
• [Support] #201: Fixed typo in SuccessURLRedirectListMixin.
• [Support] #202: Fixed typo in PermissionsRequiredMixin and MultiplePermissionsRequiredMixin.
• [Support] #209: Fixed link to Django documentation for user_passes_test decorator.