RxJS: added references of rx-lite.d.ts

rx.js/rx.async-lite.d.ts

@@ -1,6 +1,8 @@
 // This file contains common part of defintions for rx.async.d.ts and rx.lite.d.ts
 // Do not include the file separately.
 
+///<reference path="rx-lite.d.ts"/>
+
 declare module Rx {
     interface ObservableStatic {
 		/**

rx.js/rx.backpressure-lite.d.ts

@@ -1,6 +1,8 @@
 // This file contains common part of defintions for rx.backpressure.d.ts and rx.lite.d.ts
 // Do not include the file separately.
 
+///<reference path="rx-lite.d.ts"/>
+
 declare module Rx {
 	export interface Observable<T> {
 		/**