title: jit-grunt: Plugin for the "clean" task not found?
body: <p>when i run grunt build i got this error, any idea how can i resolve this issue ?</p>
  
  <p>grunt build</p>
  
  <pre><code>Running "concurrent:dist" (concurrent) task
      Warning: 
      jit-grunt: Plugin for the "compass" task not found.
      If you have installed the plugin already, please setting the static mapping.
      See https://github.com/shootaroo/jit-grunt#static-mappings
  
      Warning: Task "compass:dist" failed. Use --force to continue.
  
      Aborted due to warnings.
  </code></pre>
  
  <p>Gruntfile.js</p>
  
  <pre><code>  require('jit-grunt')(grunt, {
      express: 'grunt-express-server',
      useminPrepare: 'grunt-usemin',
      ngtemplates: 'grunt-angular-templates',
      cdnify: 'grunt-google-cdn',
      protractor: 'grunt-protractor-runner',
      buildcontrol: 'grunt-build-control',
      istanbul_check_coverage: 'grunt-mocha-istanbul',
      ngconstant: 'grunt-ng-constant'
    });
  </code></pre>