Changes include:
- Add kube-ui binary for serving static dashboard UI
- Add kube-ui docker image, replication controller, and service
- Make the kube-ui a cluster-addon (enabled by default)
- Split the compiled pkg/ui/datafile.go into separate dashboard and swagger packages
- Update docs to reflect changes
- Separating out index, version and api handlers into independent web
services. Moved the index handler to /welcome, version handler to
/version and the api handler to /api,