oops, should keep interfaces implemented by AnyEntity

entities.py

@@ -15,7 +15,8 @@
     """customized class for BlogEntry entities"""
     id = 'BlogEntry'
     fetch_attrs, fetch_order = fetch_config(['creation_date', 'title'], order='DESC')
-    __implements__ = (ICalendarViews, ICalendarable, ISiocItem)
+    __implements__ = AnyEntity.__implements__ + (
+        ICalendarViews, ICalendarable, ISiocItem)
 
     def dc_title(self):
         return self.title