code: function _recurseFolder(src) {
      // Ignore
      var relativeSrc = path.relative(process.cwd(), src);
      if(_isIgnored(relativeSrc)) return;
  
      // Process
      fs.readdir(src, function(err, files) {
        files.forEach(function(filename) {
          fs.stat(src+path.sep+filename, function(err, stat) {
            if(stat && stat.isDirectory()) {
              _recurseFolder(src+path.sep+filename);
            }
          });
        });
      });
  
      // Watch current folder
      _track(src);
    }
docs: Internal method to watch folders recursively
  
  @param  {String} src A path to start from