title: webpack react router unable to navigate child pages
body: <p>I am using <code>react-router 2.0</code> and <code>webpack</code>. I have the following code in my app.js. When I navigate to <code>http://localhost:3000/</code> I get the <code>Main</code> page. But if I navigate to <code>http://localhost:3000/about</code> I was expecting <code>about</code> page to take full screen. But I get an error saying <code>Cannot GET /about</code>. Should I do something on the webpack config to allow these routes?</p>
  
  <pre><code>import { Router, Route, Link, browserHistory } from 'react-router';
  ReactDOM.render((
      &lt;Router history={browserHistory}&gt;
         &lt;Route path="/" component={Main}&gt;
           &lt;Route path="about" component={About} /&gt;
           &lt;Route path="help" component={Help} /&gt;
         &lt;/Route&gt;          
      &lt;/Router&gt;
  ), document.getElementById('app'));
  </code></pre>