title: Running a grunt task on one Gruntfile from another
body: <p>I have a Gruntfile in the root of my project. I also have jQuery installed via Bower in an app/components/jquery directory.</p>
  
  <p>As part of my Gruntfile I'd like to run some commands on the jQuery Gruntfile to build a custom version of the library.</p>
  
  <p>How can I get at their Gruntfile from mine?</p>