re-work the entire docs directory

[michelleN]

make it look more like https://github.com/kubernetes/helm/blob/master/docs/index.md

Make the flow of the docs more coherent from an end user perspective. How do you get from zero to draft

[bacongobbler]

I've started taking a stab at this at https://github.com/bacongobbler/draft/tree/docs-makeover and will hopefully have something to show for it by the end of the day, if not by end of next week :)