fix knockout/knockoutamd-tests.ts

knockout/knockoutamd-tests.ts

@@ -1,3 +1,5 @@
+/// <reference path="./knockout.d.ts" />
+
 import ko = require("knockout");
 
 var myArray = ko.observableArray([1, 2, 3]);
@@ -6,4 +8,4 @@ class MyViewModel {
 	name = ko.observable("Jeff");
 }
 
-ko.applyBindings(new MyViewModel());
+ko.applyBindings(new MyViewModel());