title: Grails - LESS CSS @import issue
body: <p>I am unable to import a .less file into another one. I get a "file not found" exception, although I triple checked the path and syntax were right. </p>
  
  <p>Here is how I try to import the file from within my <code>importingFileName.less</code>: </p>
  
  <pre><code>@import 'main';
  </code></pre>
  
  <p>Here is how I set the resources in my ApplicationResources.groovy</p>
  
  <pre><code>modules = {
      application {
          resource url: 'js/libs/jquery-1.7.2.min.js', disposition: 'head'
          resource url: 'js/libs/jquery-ui-1.8.20.custom.min.js', disposition: 'head'
          resource url: 'js/libs/jquery.form.js', disposition: 'head'
          resource url: 'js/application.js', disposition: 'head'
      }
  
      css {
          resource url: 'css/mobile.css'
          resource url: [dir: 'less', file: 'importingFileName.less'], attrs:[rel: 'stylesheet/less', type:'css']
      }
  }
  </code></pre>
  
  <p>Here is how I call the resource from the GSPs:</p>
  
  <pre><code>&lt;r:require modules="application, css"/&gt;
  </code></pre>
  
  <p>Here is what I get: </p>
  
  <pre><code>ERROR resourceMappers.LesscssResourceMapper  - error compiling less file:
  /home/userPath/.grails/2.0.3/projects/myApp/tomcat/work/Tomcat/localhost/_/grails-
  resources/less/importingFileName.less
  
  Message: Couldn't load main.less
  </code></pre>
  
  <p>If I bundle everything into the <code>importingFileName.less</code> file, the CSS is loaded correctly using those settings. 
  Any suggestion is most welcome.</p>