Replace non-ASCII character in README

[neirbowj]

This patch enables running setup.py in environments in which locale.getpreferredencoding(False) returns 'ASCII' or any ASCII-compatible encoding.

Fixes #19

[justinmayer]

While I think the word "gratuitous" here is unnecessarily judgmental, I'm happy to entertain a more detailed description of the types of environments where the proper apostrophe poses a problem, as well as a more detailed description of what said problem is.

[neirbowj]

Thank you for that feedback. I have removed the objectionable word and will open a corresponding bug report to which this PR could become a candidate resolution.

[neirbowj]

An arguably superior alternative, which some other projects have adopted, would be to explicitly pass the encoding parameter to open. To retain backward compatibility with Python 2, it has to be passed conditionally, e.g. via **kwargs.

[avaris]

An arguably superior alternative, which some other projects have adopted, would be to explicitly pass the encoding parameter to open.

Yes, let's do that please.

To retain backward compatibility with Python 2, it has to be passed conditionally, e.g. via **kwargs.

from io import open

then you can use encoding in both python2 and python3

[neirbowj]

@avaris Great tip! See competing PR in #20.

[justinmayer]

Closing in favor of #20, which has been merged.