[streaming] Streaming local execution fix to create proper jobclient for minicluster
[streaming] StreamInvokable rework for simpler logic and easier use
[scala] [streaming] Base functionality added for streaming scala api
[scala] [streaming] Extended scala data stream functionality to include simple operators
[scala] [streaming] Finished scala StreamExecutionEnvrionment functionality + DataStream sinks + docs
[scala] [streaming] Windowing functionality added to scala api
[scala] [streaming] Added SplitDataStream functionality

Conflicts:
	flink-scala/src/main/scala/org/apache/flink/api/scala/streaming/DataStream.scala
[scala] [streaming] Added support for iterative streams for scala api
[streaming] Temporal join and cross rework for consistence and extended features
[squash] [scala] [streaming] Join and Cross operator wip