MAHOUT-1285: Arff loader can misparse string data as double

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1546624 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1285: Return NaN if a string

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1546636 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1285: Adding entry to CHANGELOG

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1546637 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1312: LocalitySensitiveHashSearch does not limit search results

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1546758 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1312: Removed import * and replaced by explicit imports

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1546765 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1367: Exception in thread "main" java.lang.NullPointerException, caused by not validating the input path.

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1546806 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1367: WikipediaXmlSplitter --> Exception in thread main java.lang.NullPointerException

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1546807 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' into lucene-matrix