Unicode error prevents installing in python3 using non-UTF locale

[ahvigil]

Trying to install on a linux system without a configured unicode locale in python3 gives an error:

# pip3 install json2html
Collecting json2html
  Downloading json2html-1.1.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-nm_jwbmx/json2html/setup.py", line 17, in <module>
        long_description=open('README.rst').read(),
      File "/usr/lib/python3.5/encodings/ascii.py", line 26, in decode
        return codecs.ascii_decode(input, self.errors)[0]
    UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 6233: ordinal not in range(128)

A workaround is to actually set an appropriate locale, but this is not always possible or convenient.