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.

cof/settings/common.py

@@ -57,17 +57,22 @@ BASE_DIR = os.path.dirname(
 # Application definition
 INSTALLED_APPS = [
     'gestioncof',
+
+    # Must be before 'django.contrib.admin'.
+    # https://django-autocomplete-light.readthedocs.io/en/master/install.html
+    'dal',
+    'dal_select2',
+
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.sites',
     'django.contrib.messages',
     'django.contrib.staticfiles',
-    'grappelli',
     'django.contrib.admin',
     'django.contrib.admindocs',
+
     'bda',
-    'autocomplete_light',
     'captcha',
     'django_cas_ng',
     'bootstrapform',
@@ -96,7 +101,7 @@ INSTALLED_APPS = [
     'kfet.cms',
 ]
 
-MIDDLEWARE_CLASSES = [
+MIDDLEWARE = [
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
@@ -124,9 +129,9 @@ TEMPLATES = [
                 'django.template.context_processors.request',
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
-                'django.core.context_processors.i18n',
-                'django.core.context_processors.media',
-                'django.core.context_processors.static',
+                'django.template.context_processors.i18n',
+                'django.template.context_processors.media',
+                'django.template.context_processors.static',
                 'wagtailmenus.context_processors.wagtailmenus',
                 'djconfig.context_processors.config',
                 'gestioncof.shared.context_processor',