message: Added a classname
diff: @@ -17,7 +17,7 @@ export default class Checkbox extends React.Component {
  render() {
  const checked = (this.props.checked || (this.props.hasOwnProperty("checked") && this.props.checked !== false));
  return (
  - <div>
  + <div className="control">
  <input
  key="checkbox"
  type="checkbox"
  