resolvers += "jitpack" at "https://jitpack.io"
libraryDependencies += "com.github.ellbur" %% "akka-stream-signal" % "1.0.0"
val numbers = Source(0 to 10) flatMapConcat(n => Source(List(n)).delay(0.5.seconds))
val latestNumber = Signal.fromSource(numbers)
latestNumber.toSource.runForeach(println)
Creates a broadcast hub similar to scalaz Signal.