Merge pull request #28 from anatoliykmetyuk/develop

Akka scheduler-based runner
Solved issues
#25 Launch anchor and launch nodes are treated as `Any` inside annotations
#26 NullPointerException by GraphicalDebugger when handling Success and AAHappened messages of dynamically launched nodes

Minor fix in CallGraphNode._scriptType
Added method r$ in SubScriptActor as preliminary replacement for <<….>>
PingPong example improved