Minor changes to the elvin ordering code. This probably needs to be

moved down to the pubsub layer ... but in the meantime (while I think
about it), add a hack to the elvin gateway that flags notifications as
coming from the gateway, and use the internal order rather then
creaing another elvin ordering, which turns out to be a different
order (cause the elvin hash function over strings is less then
perfect, but what is).

Anyway, the elvin gateway works in both directions and I can boot old
images and have them work with the new pubsub based event scheduler.