title: C3 bar chart - JSON input
body: <p>Does the C3 bar chart support JSON data? I am trying to get a simple example working but could not find any documentation or examples on how to achieve something like this:</p>
  
  <pre><code>var chart = c3.generate({
      data: {
          type: 'bar',
          json: [
              { 'indicator': 'X', 'total': 100 },
              { 'indicator': 'Y', 'total': 200 },
              { 'indicator': 'Z', 'total': 300 }
          ],
          keys: {
              x: 'indicator',
              value: ['total']
          }
      },
      bar: {
          width: {
              ratio: 0.5
          }
      }
  });
  </code></pre>