title: Adding to the requirejs optimizer fileExclusionRegExp
body: <p>Right now I'm using the following to exclude the r.js and build.js files from the optimized build.</p>
  
  <pre><code>fileExclusionRegExp: /^(r|build)\.js$/
  </code></pre>
  
  <p>How can I add to this to also exclude a directory or other files with specific extensions? Should I still be using this setting for that or is there another way to handle it. In particular I'd like to exclude those two js files and an entire directory.</p>