title: Use RbConfig instead of obsolete and deprecated Config
body: <p>When I run my Rails app in WEBrick on Ubuntu, after upgrading to ruby-1.9.3-p327, I receive the following error:</p>
  
  <blockquote>
    <p>[rake --tasks] /home/dsilver/.rvm/gems/ruby-1.9.3-p327/gems/em-dir-watcher-0.9.4/lib/em-dir-watcher.rb:7: Use RbConfig instead of obsolete and deprecated Config.</p>
  </blockquote>
  
  <p>Any idea what's going on? </p>
  
  <p>I've seen some posts connecting this to ImageMagick on Windows. I am on Ubuntu, but the app does use ImageMagick, and the ImageMagick functionality appears to have broken since the ruby upgrade from 1.9.2 to 1.9.3. I suspect a connection.</p>
  
  <p>Thanks!</p>