trying to increase code quality

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1460431 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1172 Replace org.apache.mahout.cf.taste.common.TopK with Lucene's PriorityQueue

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1460541 13f79535-47bb-0310-9956-ffa450edef68
increase code quality in examples

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1460571 13f79535-47bb-0310-9956-ffa450edef68
more clean up, removing unused classes

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1460623 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1174 - Make Lanczos code point to the preferred SSVD code (and removed one code warning)

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1460916 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1174 - Updated link to recommendation by Dmitriy.

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1460926 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1173 Reactivate checkstyle

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1461119 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1176 Introduce a changelog file to raise contributors attribution

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1461422 13f79535-47bb-0310-9956-ffa450edef68