code: function renderSASS(input, output) {
      var d = Q.defer();
  
      sass.render({
          file: input
      }, function (e, out) {
          if (e) return d.reject(e);
  
          fs.writeFileSync(output, out.css);
          d.resolve();
      });
  
      return d.promise;
  }
docs: Compile a SASS file into a css