title: Compile haml, sass & coffeescript on xcode build with PhoneGap
body: <p>I am using PhoneGap to build an html 5 backed app and I would like to use haml, sass and coffee-script.  Is there a way to build in a hook to the build process in xcode 4.2 so that the files are compiled to HTML, CSS and Javascript?  </p>
  
  <p>I am new to xcode and still trying to figure out these complicated build settings.  Thanks for your help.</p>