Add react to spa-starter-kit

app.jsx

var React = require('react');

var App = React.createClass({
    render:function(){
      return (
        <div></div>
      );
    }
  });

module.exports = App;

index.js

(function () {
  var React = require('react'),
      App = require('./components/app.jsx'); // Our custom react component

  //Needed for React Developer Tools
  window.React = React;

  // Render the main app react component into the document body. 
  // For more details see: https://facebook.github.io/react/docs/top-level-api.html#react.render
  React.render(React.createElement(App), document.body);
})();