title: Can't make grunt-contrib-compass work
body: <p>So I have the following situation.
  When I'm using compass just from CLI it just works and does exactly what's required. I'm running <code>compass compile</code> from the same folder where <code>config.rb</code> file is located (in <code>styles</code> folder). It also contains also <code>sass</code> and <code>css</code> directories.
  Here's my <code>config.rb</code> file:</p>
  
  <pre><code>project_path = '.'
  css_dir = "css"
  sass_dir = "sass"
  images_dir = "../../data/images"
  javascripts_dir = "../scripts"
  
  output_style = :compressed
  environment = :development
  relative_assets = true
  </code></pre>
  
  <p>When I'm trying to use <code>grunt</code> for this I use the following configuration in <code>Gruntfile.js</code>:</p>
  
  <pre><code>compass: {
      compile: {
          options: {
              basePath: 'app/src/styles',
              config: 'app/src/styles/config.rb'
          }
      }
  }
  </code></pre>
  
  <p>The <code>app</code> folder and <code>Gruntfile.js</code> are located at the same level. 
  When I'm running <code>grunt compass</code> I see the following output:</p>
  
  <pre><code>Running "compass:dist" (compass) task
  Nothing to compile. If you're trying to start a new project, you have left off the directory argument.
  Run "compass -h" to get help.
  
  Done, without errors.
  </code></pre>
  
  <p>If I try to specify all the options directly like:</p>
  
  <pre><code>compass: {
      compile: {
          options: {
              basePath: 'app/src/styles',
              sassDir: 'app/src/styles/sass',
              cssDir: 'app/src/styles/css',
              imagesDir: 'app/data/images'
          }
      }
  }
  </code></pre>
  
  <p>It does the job, but the <code>.sass-cache</code> folder is created at the level of <code>Gruntfile.js</code>.
  So I guess there's some problem with <code>basePath</code> option of the configuration.</p>
  
  <p>Am I doing something wrong?</p>
  
  <hr>
  
  <p><strong>EDIT</strong>:<br>
  The only way, I managed to make it work, as intended is moving <code>config.rb</code> file to the level of <code>Gruntfile.js</code>, and specifying the following options in it:</p>
  
  <pre><code>project_path = 'app/src/styles'
  css_dir = "css"
  sass_dir = "sass"
  images_dir = "../../data/images"
  javascripts_dir = "../scripts"
  
  output_style = :compressed
  environment = :development
  relative_assets = true
  </code></pre>
  
  <p>Also I removed all of the options from the 'Gruntfile.js`, which regard to this task. Still not sure, what's going on here.</p>