MAHOUT-1392: Streaming KMeans should write centroid output to a 'part-r-xxxx' file when executed in sequential mode

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1556877 13f79535-47bb-0310-9956-ffa450edef68
Added missing Change entries for Scala DSL

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1556902 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1393: Removed duplicated code from getTopTerms and getTopFeatures in AbstractClusterWriter

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1556958 13f79535-47bb-0310-9956-ffa450edef68