title: Grunt wiredep task looks for bower.json in wrong place then alerts ENOENT: no such file or directory
body: <p>I'm trying to make my wiredep work, (using grunt-wiredep)</p>
  
  <p>But I am getting the following warning:</p>
  
  <blockquote>
    <p>Warning: 
    ENOENT: no such file or directory, open 'wrongpath/bower.json' Use --force to continue.</p>
  </blockquote>
  
  <p>It seems like the task is looking for my bower.json at the wrong place,<br>
  grunt-wiredep version: "1.8.0",
  Gruntfile config (used yeoman generator..) :</p>
  
  <pre><code>    wiredep: {
          app: {
              src: ['&lt;%= yeoman.app %&gt;/index.html'],
              ignorePath: /\.\.\//
          },
          sass: {
              src: ['&lt;%= yeoman.app %&gt;/styles/{,*/}*.{scss,sass}'],
              ignorePath: /(\.\.\/){1,2}bower_components\//
          }
      },
  </code></pre>
  
  <p>I followed following post while trying to solve my issue: </p>
  
  <p><a href="https://stackoverflow.com/questions/25709324/grunt-wiredepapp-no-such-file-or-directory-bower-json">Grunt wiredep:app no such file or directory bower.json</a></p>
  
  <p>tried downgrading to 1.7.0 - didn't work 
  and upgrading to 1.9.0 - didn't work either.</p>