added missing table permission, thanks Daniel

VERSION

@@ -1 +1 @@
-Version 2.00.0 (2012-08-23 18:59:28) dev
+Version 2.00.0 (2012-08-24 08:56:41) dev

gluon/tools.py

@@ -1173,6 +1173,8 @@ class Auth(object):
         return self.db[self.settings.table_group_name]
     def table_membership(self):
         return self.db[self.settings.table_membership_name]
+    def table_permission(self):
+        return self.db[self.settings.table_membership_name]
     def table_event(self):
         return self.db[self.settings.table_event_name]
     def table_cas(self):