[jabley] install kubernetes-related things
[jabley] install kubernetes-related things

Adds:

- xhyve
- docker-machine-driver-xhyve
- minikube

Ran various `sudo` things as per the installation instructions.

See https://kubernetes.io/docs/tutorials/stateless-application/hello-minikube/

jabley/our-boxen,jabley/our-boxen,jabley/our-boxen