Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/898#issuecomment-44372409
By the way, your chart has me thinking, we need to document the Spark
version genealogy:
```
0.2 -> 0.3 -> 0.4 -> 0.5 -> 0.6 -> 0.7 -> 0.8 -> 0.9 -> 1.0
```
:P
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