Fix component type comparison in dev mode withh HMR enabled

Type comparison works fine in production, but fails in dev mode with hot module replacement (HMR) enabled. This is documented in detail at: gaearon/react-hot-loader#304

components/atoms/Radio.js

@@ -18,7 +18,7 @@ export class RadioGroup extends React.Component {
     return (
       <div>
         {React.Children.map(children, child => (
-          !(child.type === RadioButton)
+          !(child.type.name === RadioButton.name)
             ? child
             : React.cloneElement(child, {
               checked: child.props.value === value,