Add Wagtail CMS for kfet app.

K-Fêt
- Integrate wagtail to serve "static" pages of old K-Fêt website
- Fixture "kfetcms/kfet_wagtail_17_05" contains a copy of old website
(as in May 2017).
- Media files can be got until end of June 17 at
http://partage.eleves.ens.fr//files/604e6dea2ceebc66b1936c6b3f911744/kfet_media.tar.gz

Login/logout
- Update package django_cas_ng to last version.
- Clean COFCASBackend.
- Change CAS version to 3 (version used on eleves.ens). This enables
the logout redirection (for CAS ofc).
- Add messages and clean existing ones on login/logout (for both
outsider and cas users).

Misc
- Update settings to bypass an incompability between debug-toolbar and
wagtailmenus packages.
- Better management of dev/test-specific urls (if debug-toolbar wasn't in
INSTALLED_APPS, media files were not served).
- UI improvements.

kfet/views.py

@@ -23,6 +23,9 @@ from django.db.models.functions import Coalesce
 from django.utils import timezone
 from django.utils.crypto import get_random_string
 from django.utils.decorators import method_decorator
+
+from django_cas_ng.views import logout as cas_logout_view
+
 from gestioncof.models import CofProfile
 
 from kfet.config import kfet_config
@@ -47,48 +50,21 @@ from collections import defaultdict
 from kfet import consumers
 from datetime import timedelta
 from decimal import Decimal
-import django_cas_ng
 import heapq
 import statistics
 from kfet.statistic import ScaleMixin, last_stats_manifest, tot_ventes, WeekScale
 
 
-class Home(TemplateView):
-    template_name = "kfet/home.html"
-
-    def get_context_data(self, **kwargs):
-        context = super().get_context_data(**kwargs)
-        articles = list(
-            Article.objects
-            .filter(is_sold=True, hidden=False)
-            .select_related('category')
-            .order_by('category__name')
-        )
-        pressions, others = [], []
-        while len(articles) > 0:
-            article = articles.pop()
-            if article.category.name == 'Pression':
-                pressions.append(article)
-            else:
-                others.append(article)
-        context['pressions'], context['articles'] = pressions, others
-        return context
-
-    @method_decorator(login_required)
-    def dispatch(self, *args, **kwargs):
-        return super(TemplateView, self).dispatch(*args, **kwargs)
-
-
 @teamkfet_required
 def login_genericteam(request):
     # Check si besoin de déconnecter l'utilisateur de CAS
-    profile, _ = CofProfile.objects.get_or_create(user=request.user)
-    need_cas_logout = False
-    if profile.login_clipper:
-        need_cas_logout = True
+    profile = getattr(request.user, 'profile', None)
+    cas_logout = None
+    if profile and profile.login_clipper:
         # Récupèration de la vue de déconnexion de CAS
         # Ici, car request sera modifié après
-        logout_cas = django_cas_ng.views.logout(request)
+        next_page = request.META.get('HTTP_REFERER', None)
+        cas_logout = cas_logout_view(request, next_page=next_page)
 
     # Authentification du compte générique
     token = GenericTeamToken.objects.create(token=get_random_string(50))
@@ -97,11 +73,8 @@ def login_genericteam(request):
 
     messages.success(request, "Connecté en utilisateur partagé")
 
-    if need_cas_logout:
-        # Vue de déconnexion de CAS
-        return logout_cas
+    return cas_logout or render(request, "kfet/login_genericteam.html")
 
-    return render(request, "kfet/login_genericteam.html")
 
 def put_cleaned_data_in_dict(dict, form):
     for field in form.cleaned_data:
@@ -368,8 +341,9 @@ def account_read(request, trigramme):
     account = get_object_or_404(Account, trigramme=trigramme)
 
     # Checking permissions
-    if not request.user.has_perm('kfet.is_team') \
-            and request.user != account.user:
+    if not account.readable or (
+            not request.user.has_perm('kfet.is_team') and
+            request.user != account.user):
         raise PermissionDenied
 
     addcosts = (
@@ -2056,6 +2030,7 @@ def order_to_inventory(request, pk):
             messages.success(request, "C'est tout bon !")
             return redirect('kfet.order')
         else:
+            print(formset.errors)
             messages.error(request, "Corrigez les erreurs")
     else:
         formset = cls_formset(initial=initial)
@@ -2324,7 +2299,7 @@ class AccountStatBalance(PkUrlMixin, JSONDetailView):
         )
 
         context['charts'] = [{
-            "color": "rgb(255, 99, 132)",
+            "color": "rgb(200, 20, 60)",
             "label": "Balance",
             "values": changes,
         }]
@@ -2419,7 +2394,7 @@ class AccountStatOperation(ScaleMixin, PkUrlMixin, JSONDetailView):
             ventes = sum(ope['article_nb'] for ope in chunk)
             nb_ventes.append(ventes)
 
-        context['charts'] = [{"color": "rgb(255, 99, 132)",
+        context['charts'] = [{"color": "rgb(200, 20, 60)",
                               "label": "NB items achetés",
                               "values": nb_ventes}]
         return context
@@ -2501,7 +2476,7 @@ class ArticleStatSales(ScaleMixin, JSONDetailView):
             nb_accounts.append(sum_accounts)
             nb_liq.append(sum_liq)
 
-        context['charts'] = [{"color": "rgb(255, 99, 132)",
+        context['charts'] = [{"color": "rgb(200, 20, 60)",
                               "label": "Toutes consommations",
                               "values": nb_ventes},
                              {"color": "rgb(54, 162, 235)",