title: React-router "Cannot GET /*" except for root url
body: <p>I am willing to use React-router for my application, and I am trying <a href="https://rackt.github.io/react-router/#Router%20Overview">the example given in the doc</a> first, which I copied below. Now when I go to <code>localhost:3000/</code>, I see "App" as expected, but every other page, such as <code>localhost:3000/inbox</code> returns "Cannot GET /inbox". What am I missing here ?</p>
  
  <pre><code>var About = React.createClass({
    render: function () {
      return &lt;h2&gt;About&lt;/h2&gt;;
  }});
  
  var Inbox = React.createClass({
    render: function () {
      return &lt;h2&gt;Inbox&lt;/h2&gt;;
  }});
  
  var App = React.createClass({
    render () {
      return (
        &lt;div&gt;&lt;h1&gt;App&lt;/h1&gt;
          &lt;RouteHandler/&gt;
        &lt;/div&gt;
  )}});
  
  var routes = (
    &lt;Route path='/' handler={App}&gt;
      &lt;Route path="about" handler={About}/&gt;
      &lt;Route path="inbox" handler={Inbox}/&gt;
    &lt;/Route&gt;
  );
  </code></pre>