title: GMSMarker iOS issue
body: <p>I use this code to create marker on Google Map for iOS.</p>
  
  <pre><code>self.mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
      self.mapView.myLocationEnabled = YES;
      self.mapView.accessibilityElementsHidden = NO;
      self.mapView.frame = self.view.bounds;
      self.mapView.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
      self.mapView.delegate = self;
      self.mapView.settings.myLocationButton = YES;
      [self.view addSubview:self.mapView];
  
  GMSMarker *marker = [[GMSMarker alloc] init];
  marker.position = CLLocationCoordinate2DMake(-33.86, 151.20);
  marker.map = self.mapView;
  </code></pre>
  
  <p>But I need the marker to look like this:</p>
  
  <p><img src="https://i.stack.imgur.com/LnpLu.png" alt="enter image description here"></p>
  
  <p>I know how to do that with Apple Map, but I need to use Google Map (because in some cities Apple Map doesn't show almost anything).</p>
  
  <p>For google map I found only code like this:</p>
  
  <pre><code>marker.icon = image; // image from xib file
  </code></pre>
  
  <p>So I will need to create image from xib for each marker. I will have a lot of markers, so may be with this approach I will get memory warning.</p>
  
  <p>Do anybody know better way to implement marker like that?</p>