MAHOUT-1500: H2O Integration (Anand Avati via apalumbo) closes apache/mahout#21
MAHOUT-1500: H2O Integration - style revisions
MAHOUT-1610 Update tests to pass in Java 8; closes apache/mahout#46
MAHOUT-1604 add a CLI and associated code for spark-rowsimilarity, also cleans up some things in MAHOUT-1568 and MAHOUT-1569, closes apache/mahout#47
MAHOUT-1500: H2O Integration - more style revisions closes apache/mahout#48
MAHOUT-1608: Add option in WikipediaToSequenceFile to remove category labels from documents. Remove redundant call to findMatchingCategory.  closes apache/mahout#45
MAHOUT-1610 addendum: add CHANGELOG note
MAHOUT-1604, MAHOUT-1541 changes all reference to positon in the CLI to columns
MAHOUT-1500: Code cleanup and javadocs closes apache/mahout#50