Squashed commit of the following:

commit 8b314799b73c6843d592c008970cc8542c60eb87
Author: Andrew Spiers <andrew@andrewspiers.net>
Date:   Tue Aug 19 17:22:28 2014 +1000

    update readme

commit cdb616a8874f80c32ff45842564e504fdf7e0b16
Author: Andrew Spiers <andrew@andrewspiers.net>
Date:   Tue Aug 19 17:19:17 2014 +1000

    add usage examples

commit d988bc7fd2cc97fce5883b7092bd73ed3a5ad9d5
Author: Andrew Spiers <andrew@andrewspiers.net>
Date:   Tue Aug 19 17:19:01 2014 +1000

    add task to get puppet status