forgot to add admin.py to tree

itf/app/admin.py

@@ -0,0 +1,15 @@
+from django.contrib import admin
+from models import ModelsModel, ModelSort, ModelExtraButton
+
+class ButtonsInline(admin.StackedInline):
+  model = ModelExtraButton
+  extra = 2
+
+
+class ModelsModelAdmin(admin.ModelAdmin):
+  inlines = [ButtonsInline]  
+
+
+admin.site.register(ModelsModel, ModelsModelAdmin)
+admin.site.register(ModelSort)
+admin.site.register(ModelExtraButton)