title: How do I export multiple 'sub-modules' from one node.js module?
body: <p>Here's what I mean by exporting 'sub-modules':</p>
  
  <pre><code>var fibers = require('fibers');         // this works, it's the 'main' module
  var future = require('fibers/future');  // this also works, it's a 'sub'-module
  </code></pre>
  
  <p>How would I do this 'abc/xyz' export? I've gone through the <code>fibers</code> source code a little bit, and it doesn't seem like this is something that node/npm will do for me.</p>