Also, wrap the script around a Makefile. And also provide a sample
config file to describe clusters.

The build script implements the following things:
1. Generates the required configs.
2. Builds the hyperkube binary and the corresponding docker image.
3. Pushes the image to a specified repository.
4. Pulls the federation installer docker images.
5. Builds the Kubernetes clusters described the config.json file.
6. Pushes the federation components to one of the Kubernetes clusters
   built in the previous step.
7. Also turns down the federation components and the Kubernetes
   clusters.