title: Memory Issue during compiling less with grunt
body: <p>i'm currently using bower + grunt to build my website.</p>
  
  <p>dependencies in <code>bower.json</code>:</p>
  
  <pre><code>  "dependencies": {
      "jquery": "~2.1.3",
      "bootstrap": "~3.3.2",
      "admin-lte": "~2.0.0"
    },
  </code></pre>
  
  <p>dependecies in my <code>package.json</code>:</p>
  
  <pre><code>  "dependencies": {
      "grunt": "^0.4.5",
      "grunt-bower-concat": "^0.4.0"
    },
    "devDependencies": {
      "grunt": "^0.4.5",
      "grunt-contrib-concat": "^0.5.1",
      "grunt-contrib-copy": "^0.7.0",
      "grunt-contrib-cssmin": "^0.12.2",
      "grunt-contrib-less": "^1.0.0",
      "grunt-contrib-uglify": "^0.7.0",
      "grunt-contrib-watch": "^0.6.1",
      "grunt-filerev": "^2.2.0",
      "grunt-usemin": "^3.0.0"
    },
  </code></pre>
  
  <p>I was using <code>AdminLTE 1.4.*</code> and all was fine. I updated to <code>AdminLTE 2.0.0</code> and when I try to compile my less file I receive this error:</p>
  
  <pre><code>FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - process out of memory
  </code></pre>
  
  <p>I have my <code>base.less</code> file that include just <code>bootstrap</code> ad <code>Adminlte</code> stylesheets.
  If I exclude some files from the imports of <code>adminlte.less</code> file (bootstrap variables and mixins and all the skins) it compiles with no error, but I need to import the skins too :)</p>
  
  <p>How can I fix it?</p>