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.

bda/views.py

@@ -33,6 +33,8 @@ from bda.forms import (
     InscriptionInlineFormSet,
 )
 
+from utils.views.autocomplete import Select2QuerySetView
+
 
 @cof_required
 def etat_places(request, tirage_id):
@@ -813,3 +815,26 @@ def catalogue(request, request_type):
         return JsonResponse(data_return, safe=False)
     # Si la requête n'est pas de la forme attendue, on quitte avec une erreur
     return HttpResponseBadRequest()
+
+
+##
+# Autocomplete views
+#
+# https://django-autocomplete-light.readthedocs.io/en/master/tutorial.html#create-an-autocomplete-view
+##
+
+
+class ParticipantAutocomplete(Select2QuerySetView):
+    model = Participant
+    search_fields = ('user__username', 'user__first_name', 'user__last_name')
+
+
+participant_autocomplete = buro_required(ParticipantAutocomplete.as_view())
+
+
+class SpectacleAutocomplete(Select2QuerySetView):
+    model = Spectacle
+    search_fields = ('title',)
+
+
+spectacle_autocomplete = buro_required(SpectacleAutocomplete.as_view())