Automatically read files when they've changed. This does what 'autoread'
promises to do but doesn't do. This plugin requires +python or +python3.
This is different from the built-in 'autoread' option in that it periodically
checks if the file on the disk has changed, which is not what 'autoread'
does. 'autoread' only checks if the file is changed on when certain events
occur.
Use :Autoread to start checking, and :AutoreadStop to stop.
See :help :Autoread (or the help file) for more information.