implement singe use

bindings/client.go

cmd/single.go

cmd/ud.go

cmix/message/fingerprints.go

cmix/params.go

single/callbackMap.go

single/callbackMap_test.go

single/contact.go

single/contact_test.go

single/cypher.go

single/fingerprintMap_test.go

single/listener.go

single/manager.go

single/manager_test.go

single/message/collator.go

single/message/collator_test.go

single/message/request.go

single/message/request_test.go

single/message/response.go

single/message/response_test.go