Preparing for release 0.18.0

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1906734 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/CHANGES.txt b/CHANGES.txt
index 07e2778..1973503 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -18,7 +18,7 @@
 
 Pig Change Log
 
-Trunk (unreleased changes)
+Release 0.18.0 - Unreleased
  
 INCOMPATIBLE CHANGES