Move OpenLayers.Popup.AnchoredBubble to deprecated.js

notes/2.13.md

@@ -132,4 +132,15 @@ run 'build.py -h' for more details
 
 Corresponding issue/pull requests:
 
-* https://github.com/openlayers/openlayers/pull/528
+* https://github.com/openlayers/openlayers/pull/528
+
+## Deprecated Components
+A number of properties, methods, and constructors have been marked as
+deprecated for multiple releases in the 2.x series.
+For the 2.13 release this deprecated functionality has been moved to a
+separate deprecated.js file.  If you use any of the constructors or
+methods below, you will have to explicitly include the deprecated.js
+file in your build (or add it in a separate `<script>` tag after
+OpenLayers.js).
+
+ * OpenLayers.Layer.Popup.AnchoredBubble