Merge pull request #1853 from pkaul/master

Turn "when.d.ts" into an external module

promises-a-plus/promises-a-plus-tests.ts

@@ -2,7 +2,8 @@
 /// <reference path="../rx.js/rx.async.d.ts"/>
 /// <reference path="../es6-promises/es6-promises.d.ts"/>
 /// <reference path="../q/Q.d.ts"/>
-/// <reference path="../when/when.d.ts"/>
+import When = require("../when/when");
+
 
 var thenNum: PromisesAPlus.Thenable<number>; 
 var thenStr: PromisesAPlus.Thenable<string>; 

when/when.d.ts

@@ -78,3 +78,5 @@ declare module When {
         reason?: any;
     }
 }
+
+export = When;