Add support for brand stockist searches.

app/stores/views/brands.py

@@ -0,0 +1,11 @@
+from django.views.generic import ListView
+from ..models import Brand
+
+
+class BrandListView(ListView):
+    model = Brand
+    paginate_by = 10
+
+    def get_queryset(self):
+        qs = super(BrandListView, self).get_queryset()
+        return qs.exclude(stores=None).prefetch_related('stores')