Prepare release 0.4.1
Prepare release 0.4.1

jasonchaffee/akka-sse,hseeberger/akka-sse,viktorklang/akka-sse,hseeberger/akka-sse,hseeberger/akka-sse,viktorklang/akka-sse,viktorklang/akka-sse,huntc/akka-sse