Update setup.py

[wannaphong]

It can't install on windows. I fixed setup.py.

Collecting sentic
  Downloading https://files.pythonhosted.org/packages/2b/bc/f05b3a567849c4eb77250612f34645ac2d685b1c481420943977722a533b/sentic-0.0.8.tar.gz (50.5MB)
     |████████████████████████████████| 50.5MB 939kB/s
    ERROR: Complete output from command python setup.py egg_info:
    ERROR: Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\TC\AppData\Local\Temp\pip-install-ewl85v8t\sentic\setup.py", line 11, in <module>
        long_description=open('README.md').read(),
      File "C:\Users\TC\Anaconda3\lib\encodings\cp874.py", line 23, in decode
        return codecs.charmap_decode(input,self.errors,decoding_table)[0]
    UnicodeDecodeError: 'charmap' codec can't decode byte 0x99 in position 2185: character maps to <undefined>
    ----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in C:\Users\TC\AppData\Local\Temp\pip-install-ewl85v8t\sentic\