title: Cannot find module 'karma' while using grunt
body: <p>I am using <a href="http://yeoman.io">Yeoman</a> toolkit to bootstrap an <a href="http://angularjs.org">Angular</a> web application. I've followed all the steps mentioned <a href="http://www.sitepoint.com/kickstart-your-angularjs-development-with-yeoman-grunt-and-bower/">here</a>. But still, apparently, <code>grunt</code> can not find the <code>karma</code> module. It spits out this error:</p>
  
  <pre><code>Loading "grunt-karma.js" tasks...ERROR
  &gt;&gt; Error: Cannot find module 'karma'
  Warning: Task "karma" not found. Use --force to continue.
  
  Aborted due to warnings.
  </code></pre>
  
  <p>I've tried installing <code>karma</code> both locally and globally using <code>npm</code>, but nothing seems to work. </p>