title: Ruby 2.0.0p0 IRB warning: "DL is deprecated, please use Fiddle"
body: <p>I just uninstalled my older versions of Ruby, removed all of my gems
  (including Rails), and installed Ruby 2.0. In other words, a totally clean re-install. Upon starting IRB, I received this message:</p>
  
  <pre>
  DL is deprecated, please use Fiddle
  </pre>
  
  <p>Note: I'm on a Windows machine.</p>
  
  <p>What does this message mean?</p>