MAHOUT-1347: Added -ow flag for Streaming KMeans output

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1547710 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1347: Added 'qualcluster' utility to get stats about quality of Streaming KMeans clustering

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1547716 13f79535-47bb-0310-9956-ffa450edef68