Add metadata caching

Change-Id: Ic3fd0d353c66a8ae3732de7f6d342ed159f80b16
diff --git a/Changes b/Changes
index 96c7f55..51dbb27 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,7 @@
+0.16 2016-03-18
+        - Added caching mechanism for
+	  metadata.
+
 0.15 2016-03-17
         - Modularized metadata handling.
         - Simplified metadata handling.