MAHOUT-1450 Cleaning up clustering documentation

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587003 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1483: Organize links in web site navigation bar

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587081 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1509:Invalid URL in link from "quick start/basics" page

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587383 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1503: TestNaiveBayesDriver fails in sequential mode

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587387 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1504: Enable/fix thetaSummer job in TrainNaiveBayesJob

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587390 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1504: Enable/fix thetaSummer job in TrainNaiveBayesJob

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587393 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1445 Create an intro for item based recommender

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587407 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1504 fixed minor style issues

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587423 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1504:minor fx to reference relevant section of the Rennie paper

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1587481 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of https://github.com/apache/mahout into develop