报错信息：
ERROR in ./node_modules/ng-easyui/components/messager/messager.service.js
Module not found: Error: Can't resolve 'rxjs/Subject' in 'C:\xxx\ng-xxx\node_modules\ng-easyui\components\messager'
解决方法：
进入 messager.service.js，把import{Subject}from"rxjs/Subject" 改为import{Subject}from"rxjs" 就解决了
