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
MAHOUT-1616 Better support for hadoop dependencies. Now Apache Mahout's default hadoop version is 2.2.0, and we handle hadoop dependencies via hadoop-client artifact. This closes apache/mahout#54
MAHOUT-1611: Preconditions.checkArgument in org.apache.mahout.utils.ConcatenateVectorsJob
MAHOUT-1611 reverted to using Hadoop 1.x APIs, closes apache/Mahout#63