title: Angular2 error importing socket io module
body: <p>Am importing socket io module as described <a href="https://github.com/bougarfaoui/ng-socket-io" rel="nofollow noreferrer">Here on ng-socket github page</a>
   but getting an error of </p>
  
  <pre><code>Unexpected value '[object Object]' imported by the module
        'AppModule'. Please add a @NgModule annotation
  </code></pre>
  
  <p>THis is what i have done:</p>
  
  <pre><code>  import { SocketIoModule, SocketIoConfig } from 'ng-socket-io';
  
    const config: SocketIoConfig = { url: 'http://localhost:8988', options: {} };
  
   @NgModule({
   declarations: [
     AppComponent
  ],
   imports: [
       BrowserModule,
      SocketIoModule.forRoot(config) 
  ],
  providers: [],
  bootstrap: [AppComponent]
   })
  export class AppModule { }
  </code></pre>
  
  <p>What else do i need to add, If anybody has implemented a socket io successifull with angular2 you can also advice on other better packages </p>