Make module Windows-installable

[gpchelkin]

Specify open encoding. Because, for example, on Windows 10 + Conda + Python 3.6 environment:

Collecting vk_api==11.0.0 (from -r requirements.txt (line 1))
  Using cached https://files.pythonhosted.org/packages/ac/c6/7ab7b58b00c6b06af38ce244515e4c6ad6b8fae0c00d4931c63bcdc803f3/vk_api-11.0.0.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\pchelkin\AppData\Local\Temp\5\pip-install-nqlywbl6\vk-api\setup.py", line 16, in <module>
        long_description = f.read()
      File "C:\Users\pchelkin\AppData\Local\Continuum\miniconda3\lib\encodings\cp1252.py", line 23, in decode
        return codecs.charmap_decode(input,self.errors,decoding_table)[0]
    UnicodeDecodeError: 'charmap' codec can't decode byte 0x8f in position 222: character maps to <undefined>

[Helow19274]

На python 2 нет encoding'а

[python273]

поставил miniconda, вроде нормально устанавливается через pip

[python273]

Можно попробовать поменять open на io.open