title: Google maps rectangle/polygon with title
body: <p>How can I add title to google.maps.Rectangle and google.maps.Polygon? The title attribute is not available within <a href="https://developers.google.com/maps/documentation/javascript/reference?#RectangleOptions" rel="nofollow">RectangleOptions</a>. I tried it and it doesn't work
  (it is possible for google.maps.Marker, so I guess it should be for rectangle and polygon too).</p>
  
  <p>If there is no clean solution via google maps, woudln't it be possible to just get the DOM element of the rectangle and add title attribute with jQuery? So we might possibly reduce the question to <em>"How to get the DOM element of google maps rectangle/polygon?"</em></p>