title: Issue using PrimeNG
body: <p>I'm kinda new to programming itself and I am currently trying to build a Web-Overlay Demo with PrimeNG, but I'm running into issues.
  I used the &quot;Demo&quot; Code from primefaces.org to display a PanelMenu, but it is not showing up. I've tried Buttons and Accordeon first and it worked.</p>
  <p>Here's my Code:</p>
  <pre><code> import { Component, OnInit } from '@angular/core';
  
  import {PanelMenu,MenuItem} from 'primeng/primeng';
  
  
  @Component({
      selector: 'menu',
      template: `&lt;p-panelMenu [model]=&quot;items&quot; [style]=&quot;{'width':'300px'}&quot;&gt;&lt;/p-panelMenu&gt;`,
      directives: [PanelMenu],
  })
  
  
  export class PanelMenuDemo implements OnInit {
    
      private items: MenuItem[];
  
      ngOnInit() {
          this.items = [
              {
                  label: 'File',
                  icon: 'fa-file-o',
                  items: [{
                          label: 'New', 
                          icon: 'fa-plus',
                          items: [
                              {label: 'Project'},
                              {label: 'Other'},
                          ]
                      },
                      {label: 'Open'},
                      {label: 'Quit'}
                  ]
              },
              {
                  label: 'Edit',
                  icon: 'fa-edit',
                  items: [
                      {label: 'Undo', icon: 'fa-mail-forward'},
                      {label: 'Redo', icon: 'fa-mail-reply'}
                  ]
              },
              {
                  label: 'Help',
                  icon: 'fa-question',
                  items: [
                      {
                          label: 'Contents'
                      },
                      {
                          label: 'Search', 
                          icon: 'fa-search', 
                          items: [
                              {
                                  label: 'Text', 
                                  items: [
                                      {
                                          label: 'Workspace'
                                      }
                                  ]
                              },
                              {
                                  label: 'File'
                              }
                      ]}
                  ]
              },
              {
                  label: 'Actions',
                  icon: 'fa-gear',
                  items: [
                      {
                          label: 'Edit',
                          icon: 'fa-refresh',
                          items: [
                              {label: 'Save', icon: 'fa-save'},
                              {label: 'Update', icon: 'fa-save'},
                          ]
                      },
                      {
                          label: 'Other',
                          icon: 'fa-phone',
                          items: [
                              {label: 'Delete', icon: 'fa-minus'}
                          ]
                      }
                  ]
              }
          ];
      }
  }
  </code></pre>
  <p>I'm referring to the selector within my html body. I've got all the css and js stuff injected via gulp.inject and as already said, Buttons and Accordeon just works fine.</p>
  <p>Please don't forget that I am really new to programming, so be patient and talk to me as if I'm stupid! ;)
  Thanks so far!</p>
  <p>EDIT:</p>
  <p>I've added a plunkr for this.
  This time I've tried to use a simple &quot;Menu&quot; from PrimeNG.
  I'm getting the error &quot;no router provider&quot;, but I'm not using ANY routers at all.
  <a href="http://plnkr.co/edit/2bIuKmyTSYuwPyn0muZF" rel="nofollow noreferrer">Plunker</a></p>
  <pre><code>My folder structur is like this: 
  config
  --config.js
  dist
  --distfiles
  src
  --app.component.html/.scss/.ts
  --main.ts
  tasks
  --build.js
  --clean.js
  --watch.js
  --webserver.js
  gulpfile.js
  </code></pre>
  <p>Hope this helps to find my issues.</p>