title: app.module error with finding a name
body: <p>I am currently creating an angular 2 project, however I cannot get passed these two errors I am getting in my console </p>
  
  <p>ERROR in [default] /Users/~/src/app/app.module.ts:35:4 
  Cannot find name 'SelectItem'.</p>
  
  <p>ERROR in [default] /Users/~/src/app/app.module.ts:36:4 
  Cannot find name 'Message'.</p>
  
  <p>I have added the two imports into my app.</p>
  
  <pre><code>import { BrowserModule } from '@angular/platform-browser';
  import { NgModule } from '@angular/core';
  import { FormsModule } from '@angular/forms';
  import { HttpModule } from '@angular/http';
  
  import { AppComponent } from './app.component';
  
  import {SelectItem, Message, Header} from 'primeng/primeng';
  
  @NgModule({
   declarations: [
    AppComponent,
   ],
   imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    SelectItem,
    Message,
    Header
   ],
   providers: [],
   bootstrap: [AppComponent]
  })
  export class AppModule { }
  </code></pre>