title: Forms in Angular 2 RC4
body: <p>I am experimenting with forms in Angular 2 RC4.
  It's all working fine but when I start the app the browser console gives me this message:</p>
  
  <pre><code>*It looks like you're using the old forms module. This will be opt-in in the next RC, and will eventually be removed in favor of the new forms module.
  </code></pre>
  
  <p>The relevant part of my component looks like this:</p>
  
  <pre><code>import {
      FORM_DIRECTIVES,
      REACTIVE_FORM_DIRECTIVES,
      FormBuilder,
      FormGroup
  } from '@angular/forms';
  import {Observable} from "rxjs/Rx";
  
  @Component
  ({
      selector: "hh-topbar",
      moduleId: module.id,
      templateUrl: "topBar.component.html",
      directives: [HHPagerComponent, FORM_DIRECTIVES, REACTIVE_FORM_DIRECTIVES]
  })
  
  export class HHTopBarComponent implements OnChanges, OnInit
  {
      ...
      private filterForm: FormGroup;
      private title$: Observable&lt;string&gt;;
  
      constructor(private formBuilder: FormBuilder)
      {
      }
  
      public ngOnInit(): any
      {
          this.filterForm = this.formBuilder.group
          ({
              "title": [this.info.filters.searchFileName]
          });
  
          this.title$ = this.filterForm.controls["title"].valueChanges;
          this.title$.subscribe(val =&gt;
          {
              this.info.filters.searchFileName = val;
              this.filterChanged.emit(this.info.filters);
          });
      }
  }
  </code></pre>
  
  <p>And the relevant part of my template looks like this:</p>
  
  <pre><code>&lt;form [formGroup]="filterForm"&gt;
      &lt;div&gt;
          &lt;label for="title"&gt;Title&lt;/label&gt;
          &lt;input [formControl]="filterForm.controls['title']" id="title" /&gt;
      &lt;/div&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>Does anybody here know what is the new forms module the warning is talking about and which directives will change and to what?</p>