Add garbage collector stats to output of TaskManager memory usage debug thread
Functions can now implement ResultTypeQueryable to supply TypeInformation manually.
The Hadoop Compatibility has been refactored and extended to support the new Java API.
Hadoop compatibility now also supports MR2 API.
hadoopcompatibility: Implementations of basic programming interfaces and a basic driver.

* wrappers for Mapper, Reducer and Combiner (as a local Reducer) on the new Java API
* wrapper for OutputCollector
* wrappers for Partitioner, values comparator.
* a driver making it posible to run unmonitored (so far)  Hadoop jobs on Flink.
* tests and variations of the WordCount driver exclusively in Hadoop.