title: Get postal code with autocomplete service from google maps api v3
body: <p>I'm using the autocompleteservice from google maps api V3 to make a custom autocomplete input.
  I basically call this function to retrieve cities suggestions.</p>
  
  <pre><code>function getPlaces(st){
      gService.getQueryPredictions({input:st,types:['geocode']},function(predictions,status)      {
          if(status != google.maps.places.PlacesServiceStatus.OK) return false;
          for(var i = 0, prediction; prediction = predictions[i]; i++){
              console.log(prediction);
          }
          return predictions;
      });
  }
  </code></pre>
  
  <p>This is working great, but i want to get the zip code associated to cities.
  Like the V2 api did, <a href="http://maps.googleapis.com/maps/api/js/GeocodeService.Search?4sbeau&amp;7sFR&amp;9sfr-FR&amp;callback=_xdc_._rmc2d7&amp;token=103359" rel="noreferrer">see this example</a>.</p>
  
  <p>I tried to change the types option to cities, but the result is the same.
  Any idea how to do that?</p>