Upgrade to Akka 2.3.7, akka-stream 0.11 and sbt 0.13.7-RC4
Merge pull request #2 from hseeberger/upgrades

Upgrade to Akka 2.3.7, akka-stream 0.11 and sbt 0.13.7-RC4
Setting version to 1.0.3
Setting version to 1.1.0-SNAPSHOT