MAHOUT-1560 Last batch is not filled correctly in MultithreadedBatchItemSimilarities
MAHOUT-1558 Clean up classify-wiki.sh and add in a binary classification problem
MAHOUT-1561 cluster-syntheticcontrol.sh not running locally with MAHOUT_LOCAL=true
MAHOUT-1480 Clean up website on 20 newsgroups
MAHOUT-1446 Create an intro for matrix factorization
MAHOUT-1555: Exception thrown when a test example has the label not present in training examples, added LOG warning message
MAHOUT-1555: Exception thrown when a test example has the label not present in training examples, added LOG warning message