Preparing for branch-0.19.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.19@704709 13f79535-47bb-0310-9956-ffa450edef68

src/contrib/hod/CHANGES.txt

@@ -4,6 +4,18 @@ Trunk (unreleased changes)
 
   INCOMPATIBLE CHANGES
 
+  NEW FEATURES
+
+  IMPROVEMENTS
+
+  OPTIMIZATIONS
+
+  BUG FIXES
+
+Release 0.19.0 - Unreleased
+
+  INCOMPATIBLE CHANGES
+
   NEW FEATURES
 
     HADOOP-3695. Provide an ability to start multiple workers per node.