Apache Release 5.0.0

• A new Example Partitioner Tool is useable in its own right for partitioning medium sized data sets up to about 1E9 items. But the same algorithm could be used in a parallel environment for partitioning data sets many orders-of-magnitude larger.
• Lots of internal cleanup and a few API improvements for consistency across the different quantile sketches, for example. These changes in the API, although relatively minor, were the reason to move to a major release.
• Fixed an integer overflow bug caught by Karan Kumar (via Druid), where very large partitioning datasets using the classic quantiles DoublesSketch::getPartitionBoundaries() would fail.