title: React-bootstrap code not rendering
body: <p>I have installed react-bootstrap with npm (npm install react-bootstrap --save) but my code is not rendering on the browser. The page is just blank. I use webpack for builds and babel for transpilation. Below is my react code.  </p>
  
  <pre><code>import React from 'react'
  import ReactDOM from 'react-dom'
  import ReactBootstrap from 'react-bootstrap'
  
  const buttonsInstance = (
    &lt;ButtonToolbar&gt;
      &lt;Button bsStyle="primary" bsSize="large" active&gt;Primary button&lt;/Button&gt;
      &lt;Button bsSize="large" active&gt;Button&lt;/Button&gt;
    &lt;/ButtonToolbar&gt;
  );
  
  ReactDOM.render(buttonsInstance, document.getElementById('root'));
  </code></pre>
  
  <p>Thanks!</p>