docs: function compileAllFiles (src, isDebug, options)
  {
      glob(src,
          function (err, files)
          {
              if (err) throw err;
  
              for (var i = 0, l = files.length; i < l; i++)
              {
                  // only start compilation at root files
                  if (sassHelpers.isRootFile(files[i]))
                  {
                      compileSingleFile(files[i], isDebug, options);
                  }
              }
          }
      );
  }