Attempt at making bulk deletion clear out handlers, to remove the problem of orphaned Attributes.

evennia/typeclasses/apps.py

@@ -0,0 +1,10 @@
+from __future__ import unicode_literals
+
+from django.apps import AppConfig
+
+
+class TypeclassesConfig(AppConfig):
+    name = 'typeclasses'
+
+    def ready(self):
+        from . import signals