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New features:
* This release adds support for Python 3 mainly.
Performance enhancements:
* Use a non blocking socket for the pyzor server, allowing asynchronous running and
graceful shutdown of the server.
Others:
* Read stdin for pyzor in binary mode (fixes `64 <https://github.com/SpamExperts/pyzor/issues/64>_)
* Catch an unhandled exception when running pyzor as a user with no home directory (fixes <86 https://github.com/SpamExperts/pyzor/issues/68>_)
* Miscellaneous changes related to Python 3 support (up to Python 3.12) that remove deprecated methods/syntax.