title: How to use external library not available in NPM or bower in react/webpack?
body: <p>I see this library here:</p>
  
  <p><a href="http://sztanko.github.io/crosslet/" rel="nofollow">http://sztanko.github.io/crosslet/</a></p>
  
  <p>There is no bower install, there is no npm install, but I want to use it in my webpack reactjs ES6 app. How can I do this properly? If not possible with ES6, JSX is fine too.</p>