title: Angular2,(change)event doesn't fire
body: <p>I'm new with Angular and struggling with event binding...</p>
  
  <p>I set <code>(change)</code>event in <code>mdInput</code> with <code>[(ngModel)]</code>and<code>mdAutocomplete</code>, but it doesn't fire....it used to work properly in <code>md-select</code> without <code>mdAutocomplete</code>.</p>
  
  <p>Can't <code>(change)</code>event  work together with <code>mdAutocomplete</code> or not in <code>mdInput</code>?</p>
  
  <p>any codes I lack?</p>
  
  <pre><code>&lt;md-input-container class=middle-class&gt;
                  &lt;input mdInput required placeholder="荷主" [(ngModel)]="detail.ownerTx" [ngModelOptions]="{standalone: true}" (change)="detail.changeOwner($event)"
                    [mdAutocomplete]="autoTxt"&gt;
                &lt;/md-input-container&gt;
                &lt;md-autocomplete #autoTxt="mdAutocomplete"&gt;
                  &lt;md-option *ngFor="let owner of detail.owners" [value]="owner.ownerTx"&gt;{{ owner.ownerTx }}&lt;/md-option&gt;
                &lt;/md-autocomplete&gt;
              &lt;/td&gt;
  </code></pre>