Github user zentol commented on the pull request:
https://github.com/apache/flink/pull/202#issuecomment-71453267
I've rebased and update this PR.
Notable new stuff:
* hybrid mode removed
* documentation update and integrated into website
* **chaining** on the python side (map,flatmap, filter, combine)
* groupreduce/cogroup reworked - grouping done on python side
* iterators passed to UDF's now iterable
* **lambda support**
* **test coverage** (works from IDE, maven and on travis)
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