dojo/when standalone module (get ready for 1.8, start now)

Finally on the 1.4.2012 dojo team extracted Deferred.when() function into separate module dojo/when. So it is the end of including Deferred if only when() is needed, and end of Deferred.when() ugly client code. Thank you. P.S: old dojo/_base/Deferred uses new dojo/when.js