Failed attempts to increase remote throughput.
Updated to newest Akka release.
Simple flow control.

Problem: Requires very short heartbeat intervals.
Increasing Netty pool sized.
Minor fixes.
Implemented decentralized PingPong throttling.
More aggressive throttling, only during comp.
Best throttling settings so far.
Using the Akka-Kryo JAR dependency again.
Adapting some Akka params to the number of cores.
Initializing throttling together with idle detection.
Disabling ping pong throttling on 1 node.
Merge branch 'pingpong-throttling' into scala-2.11-akka-2.3.2-migration