Add todo content for notify-out.

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac289@2688 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/python/isc/notify/TODO

@@ -0,0 +1,2 @@
+1. the class NotifyOut should provide one interface for adding/deleting zones dynamically.
+