Imports of package state

PathSynopsis
github.com/docker/go-events
github.com/docker/swarmkit/apiPackage api is a generated protocol buffer package.
github.com/docker/swarmkit/manager/state/watch
golang.org/x/net/contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.