[streaming] Merged commits from main repo & License header fix
Merge branch 'streaming-ready' of https://github.com/mbalassi/incubator-flink into streaming-ready
[streaming] Forward connection type added to DataStream to support inmemory forwarding of tuples
[streaming] Iteration update to use proper partitioning and forward connection + DataStream refactor and Javadoc update
Merge branch 'streaming-ready' of https://github.com/mbalassi/incubator-flink into streaming-ready
[streaming] Javadoc update for some core classes
Merge branch 'streaming-ready' of https://github.com/mbalassi/incubator-flink into streaming-ready