MAHOUT-1604, MAHOUT-1541 changes all reference to positon in the CLI to columns
MAHOUT-1500: Code cleanup and javadocs closes apache/mahout#50
MAHOUT-1615: SparkEngine drmFromHDFS returning the same Key for all Key,Vec Pairs for Text-Keyed SequenceFiles. this closes apache/mahout #52
Revert "MAHOUT-1615: SparkEngine drmFromHDFS returning the same Key for all Key,Vec Pairs for Text-Keyed SequenceFiles. this closes apache/mahout #52"

This reverts commit 034afd61126660b6f44b232fdf3e1dd9d1a79708.
MAHOUT-1615: SparkEngine drmFromHDFS returning the same Key for all Key,Vec Pairs for Text-Keyed SequenceFiles.  This closes apache/mahout#52
MAHOUT-1615: fix up HDFS ClassTag reading from H2O bindings. this closes apache/mahout#58
MAHOUT-1615: remove temporary hard coded settings from spark-shell
NOJIRA refactor IndexedDataset and CLI drivers into core and engine specific parts, closes apache/mahout#59
fixed bug, now reporting correct app name to Spark
moved Mahout to Spark 1.1.0
Merge branch 'master' into MAHOUT-1493