Updated dependencies & Fixed OSGi build

- Kryo to 2.23.0
* Fixed import on class in Objenesis not embedded in Kryo anymore
- Akka to 2.3.1

Fixed OSGi build:
- Import range compatible with Typesafe Config 1.2.0
- Added missing package com.romix.scala.serialization.kryo (an exported package)

I didn't change the project version in this pullreq. The code ran successfully with Akka Cluster+OSGi.