[scala] Change CaseClassSerializer/Comparator to not use For-Loop
[build tools] update release sciprts
Set version to 0.8-incubating-SNAPSHOT
[streaming] Added cross operator

Conflicts:
	flink-addons/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/datastream/ConnectedDataStream.java
[streaming] Temporal cross refactor

Conflicts:
	flink-addons/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/datastream/ConnectedDataStream.java
[FLINK-1175] [streaming] GroupBy updated to allow multiple field and keyselector groupings
[streaming] Updated aggregations to work also on arrays by default
[streaming] Removed obsolete state objects from streaming-core
[streaming] OperatorState and StateCheckpoint classes and implementations added for state checkpointing and rebalancing
[streaming] StreamingRuntimeContext added with API support for registering fault tolerant state objects for the operators