For #4796.

Changes proposed in this pull request:

• distutils will eventually be removed from the stdlib
• Replace distutils.version with packaging.version.parse

• packaging.version.parse is a third-party utility but is used by setuptools (so you probably already have it installed) and is conformant to the current PEP 440; it will return a packaging.version.Version if the version is compliant and a packaging.version.LegacyVersion if not. The latter will always sort before valid versions.

• https://stackoverflow.com/a/11887885/724176