title: Gmap3 issue with style and hover
body: <p>I have questions about gmap3 integrate to my site.
  This is my code
  ?</p>
  
  <pre><code>    $("#mapa").gmap3({
  
  
  map:{
      options:{
        center:[41.993752,21.427277],
        zoom: 16,
        zoomControl: false,
        scaleControl: false,
        scrollwheel: false,
        disableDoubleClickZoom: false 
      }
    },
    marker:{
      values:[
        {latLng:[41.993889, 21.416522], options:{icon: "css/img/marker.png"}},
        {latLng:[41.99452, 21.433433], options:{icon: "css/img/marker.png"}}
      ],
      options:{
        draggable: false
      }
  
    }
  });
  </code></pre>
  
  <ol>
  <li>The code above work if script in index file, but if i try to put from custom.js no work (no show map) why?</li>
  <li>How to make gray map style to code above?</li>
  <li>How to make hover effect to marker?</li>
  </ol>
  
  <p>Thank you,
  I hope undestand all what i need.</p>