Improve documentation for and-cli deploy command

[wintondeshong]

The deploy command and its subcommands have grown to a point that they would benefit from some supplementary documentation. While there are many ways this could go a few ideas are...

• Diagram showing high-level flow of sub/command structure and the steps it handles for deployments
• Written play by play of how the deploys work (both aws and azure branches of it)
• Provide actual examples of how it might be composed in a CI environment (like jenkins) to provide a complete deployment process on projects