mtools 1.4.1

Highlights of this release are:

• Migrate wiki docs to gh-pages and RST (#550, #550): http://blog.rueckstiess.com/mtools/
• mlaunch: Fixes for Python 3.6.5 support (#596, #586)
• Include sys.version in --version output (#597)

Thanks to @kallimachos, @sindbach, @kevinadi, @manfontan, and @stennie for contributions to this release!

To install, run:

pip install mtools --upgrade

See Changes to mtools for a full change history.