Open README as UTF-8
Open README as UTF-8

On Windows if I try to install your package with pip or setup.py after cloning the repo, I get an error about encoding:

```
Collecting vocabulary
  Downloading Vocabulary-0.0.4.tar.gz
    Traceback (most recent call last):
      File "<string>", line 20, in <module>
      File "vocabulary\setup.py", line 10, in <module>
        long_description = str(readme.read())
      File "python\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 5330: character maps to <undefined>
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

      File "<string>", line 20, in <module>

      File "vocabulary\setup.py", line 10, in <module>

        long_description = str(readme.read())

      File "python\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 5330: character maps to <undefined>
```


If we explicitly pass `encoding="utf8"` to `open` the installation goes off without a hitch.
prodicus/vocabulary,tenorz007/vocabulary