Upgrade to Django 1.11

- Deprecation warnings using Django 1.8 are resolved.
- Deprecation warnings using Django 1.11 are resolved.

- Admin: grappelli is no longer used.
- Upgrade to django-autocomplete-light v3 (v2 is not 1.11 compatible).
  * autocomplete.modelform_factory being dropped, code uses dal Select2
    views and widgets.

kfet/auth/middleware.py

@@ -13,8 +13,11 @@ class TemporaryAuthMiddleware:
     values from CofProfile and Account of this user.
 
     """
-    def process_request(self, request):
-        if request.user.is_authenticated():
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        if request.user.is_authenticated:
             # avoid multiple db accesses in views and templates
             request.user = (
                 User.objects
@@ -31,6 +34,8 @@ class TemporaryAuthMiddleware:
             request.real_user = request.user
             request.user = temp_request_user
 
+        return self.get_response(request)
+
     def get_kfet_password(self, request):
         return (
             request.META.get('HTTP_KFETPASSWORD') or