title: Change bar color in a vertical grouped bar with dimple
body: <p>I'm building the next chart:</p>
  
  <pre><code>var myChart = new dimple.chart(svg, data);
  //chart.setBounds(100, 100, "70%", "80%");
  
  var x = myChart.addCategoryAxis("x", ["time","channel"]);//["time", "channel"]);
  var y1 = myChart.addMeasureAxis("y", "Produccion");
  //var y2 = chart.addMeasureAxis("y", "Produccion");
  
  myChart.addSeries("Energy", dimple.plot.bar);//, [x,y1]);
  myChart.addLegend(65, 10, 510, 20, "right");
  myChart.draw(5000);
  </code></pre>
  
  <p>but I can't put in a different colour the bar that represent the value of each element of the group.</p>