message: Update react-hot-loader reference in readme to react-hot-loader
diff: <br>
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  -A boilerplate for Scalable Cross-Platform Desktop Apps based on <a href="http://electron.atom.io/">Electron</a>, <a href="https://facebook.github.io/react/">React</a>, <a href="https://github.com/reactjs/redux">Redux</a>, <a href="https://github.com/reactjs/react-router">React Router</a>, <a href="http://webpack.github.io/docs/">Webpack</a> and <a href="https://github.com/gaearon/react-transform-hmr">React Transform HMR</a> for rapid application development.
  +A boilerplate for Scalable Cross-Platform Desktop Apps based on <a href="http://electron.atom.io/">Electron</a>, <a href="https://facebook.github.io/react/">React</a>, <a href="https://github.com/reactjs/redux">Redux</a>, <a href="https://github.com/reactjs/react-router">React Router</a>, <a href="http://webpack.github.io/docs/">Webpack</a> and <a href="https://github.com/gaearon/react-hot-loader">React Hot Loader</a> for rapid application development (HMR).
  </p>
  <div align="center">
  