* Clients overload UGen::new1 , this gives a mehod we can pass a blocking arg to without cluttering kr, and puts all arg checks in one place.
* Blocking calls are done with processBlocking
* FluidBufCompose always blocks
* NRT process calls new1, not kr
* some server.syncs removed to lessen dilly dallying
* completion is triggered by /done message from server, matched against nodeID. replyID indicates status