Update CHANGES.txt to reflect merge of HADOOP-2813 to 0.16.1
Update CHANGES.txt to reflect merge of HADOOP-2813 to 0.16.1

git-svn-id: 5be3658b1da2303116c04834c161daea58df9cc4@635120 13f79535-47bb-0310-9956-ffa450edef68

awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop