YAHOO Global Namespace - Release Notes

0.11.0
   * Added YAHOO.extend, which provides an easy way to assign the prototype,
     constructor, and superclass properties inheritance properties.  It also
     prevents the constructor of the superclass from being exectuted twice.

0.10.0
   * Added YAHOO.log that provides a safe way to plumb logging statements in
     code that will work if the logging component isn't available.