General: needs docs, use cases, examples

[benlk]

Making deploy-tools more friendly to people who want to use it with their own WordPress dev rigs, and to people who want to work on Largo

• [x] create docs/ folder
• [x] move COMMANDS.MD into docs folder
• [ ] how to get set up initially
  • [ ] case: a Largo-umbrella project
• [ ] how to deploy
• [ ] common errors
• [x] copy https://gist.github.com/benlk/43af859b4eb4bf65e710

[milojennings]

+1 I'd love to use these tools, but I'm having a hard time getting started.