[FLINK-1327] [core] Fix wrapping of MemorySegments in ByteBuffers
[streaming] Basic support reading from local and distributed file systems in readTextFile methods

Conflicts:
	flink-addons/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/JobGraphBuilder.java
	flink-addons/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java
[streaming] ReadTextFile re-implemented as RichFunction and cleanup

Conflicts:
	flink-addons/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java
[Runtime] [Tests] Remove flaky check in LocalInstanceManagerTest
[Distributed runtime] Fail task if execution state update is unsuccessful
[Java API] Fix equality checks on PojoTypeInfo
[APIs] Add ExecutionConfig
[FLINK-1325] [Java API] Add Java ClosureCleaner

This closes #269
[FLINK-1325] [Java API] Minor cleanups on the ClosureCleaner
Bump version to 0.9-incubating-SNAPSHOT
integrated forwarded Fields into the optimizer
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