MultiDeck+discussion

I'm thining that maybe next steps are to add an option to some of the decko commands to select a deck. Then I could seed a second one and run tests in the default or additional instances.

A test with only deck_id:10 populated with test seeds, but no seeds for default (1) should be a pretty good test. Then some routing tests for the name based routing to select a given deck.

I'll have to investigate how to use cucumbers where hostnames are 'routed'. Should be doable.