code: function createKeyFolders(key, fullPath, cb) {
  	// NOTE: We check after first character, since a leading slash will be omitted by path.join
  	if (key.indexOf(path.sep) <= 0) {
  		return cb();
  	}
  
  	mkdirp(path.dirname(fullPath), cb);
  }
docs: Creates any subfolders we need for a given filevault key. If any errors occur during folder
  creation an error is returned via the callback.
  
  @param {String} key
  @param {String} fullPath
  @param {Function} cb