Fixed Django 2.0 compatibility due to django.conf.urls.include parameters change.

[felixxm]

Fixed Django 2.0 compatibility due to django.conf.urls.include parameters change (see Django documentation 1.8, 2.0).

==================================== ERRORS ====================================
____________________ ERROR collecting tests/test_routers.py ____________________
tests/test_routers.py:84: in <module>
    url(r'^namespaced/', include(namespaced_router.urls, namespace='example')),
/django/conf/urls/__init__.py:44: in include
    'Specifying a namespace in django.conf.urls.include() without '
E   django.core.exceptions.ImproperlyConfigured: Specifying a namespace in
django.conf.urls.include() without providing an app_name is not supported.
Set the app_name attribute in the included module, or pass a 2-tuple containing
the list of patterns and app_name instead.
__________________ ERROR collecting tests/test_versioning.py ___________________
tests/test_versioning.py:166: in <module>
    class TestURLReversing(URLPatternsTestCase):
tests/test_versioning.py:173: in TestURLReversing
    url(r'^v1/', include(included, namespace='v1')),
/django/conf/urls/__init__.py:44: in include
    'Specifying a namespace in django.conf.urls.include() without '
E   django.core.exceptions.ImproperlyConfigured: Specifying a namespace in
django.conf.urls.include() without providing an app_name is not supported.
Set the app_name attribute in the included module, or pass a 2-tuple containing
the list of patterns and app_name instead.

[felixxm]

All remaining errors are related with django-guardian. They already fixed them (see 276da317), we need to wait for v.1.4.7 version.

[tomchristie]

Great stuff!