def file(options = {})
      options[:file_name] ||= 'pass.mswallet'
      temp_file = Tempfile.new(options[:file_name])
      temp_file.write self.stream.string
      temp_file.close
      temp_file
    end
def file(options = {})
      options[:file_name] ||= 'pass.mswallet'
      temp_file = Tempfile.new(options[:file_name])
      temp_file.write self.stream.string
      temp_file.close
      temp_file
    end
Return a Tempfile containing our ZipStream