text: Title: README.rst contains non-ASCII characters fails installtion
  Body: ```powershell
  > pip install sandman2
  Collecting sandman2
    Using cached https://files.pythonhosted.org/packages/34/43/65317a5a01c16d494a68b37bc21d9cbe17c3fd089b76835fdbda60f1973b/sandman2-1.2.0.tar.gz
      Complete output from command python setup.py egg_info:
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "C:\Users\34357\AppData\Local\Temp\pip-install-1toj7xsk\sandman2\setup.py", line 19, in <module>
          LONG_DESCRIPTION = read('README.rst')
        File "C:\Users\34357\AppData\Local\Temp\pip-install-1toj7xsk\sandman2\setup.py", line 17, in read
          return codecs.open(os.path.join(HERE, *parts), 'r').read()
      UnicodeDecodeError: 'gbk' codec can't decode byte 0xa6 in position 2084: illegal multibyte sequence
  ```
  
  # Solution1
  
  README.rst contains non-ASCII character `’`, should replace it with ASCII character `'`
  See https://github.com/pypa/virtualenv/issues/201#issuecomment-3145690
  
  # Solution2
  
  https://github.com/jeffknupp/sandman2/blob/1ce21d6f7a6df77fa96fab694b0f9bb8469c166b/setup.py#L16-L17
  
  Intentionally *do* adding an 'utf-8' encoding option to open