add: module threads; read and write binary file supports

autojs/src/main/assets/javascript_engine_init.js

@@ -49,6 +49,7 @@ var __that__ = this;
 var Promise = require('promise.js');
 var JSON = require('__json2__.js');
 var util = require('__util__.js');
+var threads = __runtime__.threads;
 
 var __asGlobal__ = function(obj, functions){
     var len = functions.length;

autojs/src/main/assets/modules/__engines__.js

@@ -17,7 +17,7 @@ module.exports = function(__runtime__, scope){
     }
 
     engines.myEngine = function(){
-        return scope.__engine__;
+        return rtEngines.myEngine();
     }
 
     engines.stopAll = rtEngines.stopAll.bind(rtEngines);