Merge pull request #15 from mroderick/increase-sinon-compatibility

Increase compatiblity with faking time in test tools

Promise.js

@@ -1,4 +1,7 @@
 (function(root) {
+    // Store setTimeout reference so promise-polyfill will be unaffected by
+    // other code modifying setTimeout (like sinon.useFakeTimers())
+	var setTimeout = setTimeout;
 
 	// Use polyfill for setImmediate for performance gains
 	var asap = (typeof setImmediate === 'function' && setImmediate) ||
@@ -187,4 +190,4 @@
 		root.Promise = Promise;
 	}
 
-})(this);
+})(this);