docs: def readme():
      """Try to read README.rst or return empty string if failed.
  
      :return: File contents.
      :rtype: str
      """
      path = os.path.realpath(os.path.join(os.path.dirname(__file__), 'README.rst'))
      handle = None
      url_prefix = 'https://raw.githubusercontent.com/Robpol86/{name}/v{version}/'.format(name=NAME, version=VERSION)
      try:
          handle = codecs.open(path, encoding='utf-8')
          return handle.read(131072).replace('.. image:: docs', '.. image:: {0}docs'.format(url_prefix))
      except IOError:
          return ''
      finally:
          getattr(handle, 'close', lambda: None)()