Update django CAS NG

Fixes #9

backend/base_app/urls.py

@@ -17,9 +17,9 @@ urlpatterns += [
     # TODO remove this before going to full prod
     url(r"^role_change/", views.role_change),
     url(r"^admin/", admin.site.urls),
-    url(r"^user/login$", django_cas_ng.views.login, name="cas_ng_login"),
-    url(r"^user/logout$", django_cas_ng.views.logout, name="cas_ng_logout"),
-    url(r"^user/callback$", django_cas_ng.views.callback, name="cas_ng_proxy_callback"),
+    url(r"^user/login$", django_cas_ng.views.LoginView.as_view(), name="cas_ng_login"),
+    url(r"^user/logout$", django_cas_ng.views.LogoutView.as_view(), name="cas_ng_logout"),
+    url(r"^user/callback$", django_cas_ng.views.CallbackView.as_view(), name="cas_ng_proxy_callback"),
     url(r"^app/.*", include("frontend_app.urls")),
     url(r"^$", RedirectView.as_view(url="./app/"), name="go to real home"),
     url(r"", include("backend_app.urls")),

backend/requirements.txt

 #OutGoing_REX
 Django==2.0.10
 psycopg2-binary==2.7.4
-git+https://github.com/mingchen/django-cas-ng.git@e9c0472e326087bfb839487f0736a4e1454cffda#egg=django-cas-ng
+django-cas-ng==3.6.0
 djangorestframework==3.8.2  # Django REST Framework
 coreapi==2.3.3  # Automatic API doc generation
 django-reversion==2.0.13
@@ -17,4 +17,4 @@ pyyaml
 git+https://github.com/FloChehab/django-extensions.git@30c1a807aeb985739358d70907496e98d1857abb#egg=django-extensions
 uwsgi
 dotmap
-django-webpack-loader==0.6.0
\ No newline at end of file
+django-webpack-loader==0.6.0