Replace grid areas with an IE11 compatible system

[danlevings]

[evancharlton]

Alternative proposal: expose all of the necessary high-level components (eg LineChart, ContextChart, AxisCollection, etc) and leave the rendering/layout entirely up to the calling application.

<DataProvider>
  <table>
    <tbody>
      <tr>
        <td>
          <LineChart />
        </td>
        <td>
          <AxisCollection />
        </td>
      </tr>
      <tr>
        <td>
          <ContextChart />
        </td>
        <td />
      </tr>
    </tbody>
  </table>
</DataProvider>