def clean(name)
      return false if exists?(name)
      path = File.join(directory, dir_name(name))
      FileUtils.rm_rf(path)
    end
def clean(name)
      return false if exists?(name)
      path = File.join(directory, dir_name(name))
      FileUtils.rm_rf(path)
    end
Cleans the directory for a box by removing the folders that are
 empty.