Switch to Azure/draft instead of Herokuish

Description

https://github.com/Azure/draft

Proposal

Links / references

• Draft: https://github.com/Azure/draft
• Blog post: http://blog.kubernetes.io/2017/05/draft-kubernetes-container-development.html

Documentation blurb

(Write the start of the documentation of this feature here, include:

1. Why should someone use it; what's the underlying problem.
2. What is the solution.
3. How does someone use this

During implementation, this can then be copied and used as a starter for the documentation.)