code: function _addFileOrContinueBrowsing (item, fileList) {
    !fs.statSync(item).isDirectory() ? fileList.push(item) : _browseDir(item, fileList)
  }
docs: add file to the bucket or continue browsing
  @param {String} item               can be a file or directory
  @param {Array.<String>} fileList   store all files