Add aliases for links and link widgets

README.md

 # Kubernetes
 
-[![GoDoc](https://godoc.org/k8s.io/kubernetes?status.png)](https://godoc.org/k8s.io/kubernetes) [![Travis](https://travis-ci.org/kubernetes/kubernetes.svg?branch=master)](https://travis-ci.org/kubernetes/kubernetes) [![Coverage Status](https://coveralls.io/repos/kubernetes/kubernetes/badge.svg)](https://coveralls.io/r/kubernetes/kubernetes)
+[![GoDoc Widget]][GoDoc] [![Travis Widget]][Travis] [![Coverage Status Widget]][Coverage Status]
+
+[GoDoc]: https://godoc.org/k8s.io/kubernetes
+[GoDoc Widget]: https://godoc.org/k8s.io/kubernetes?status.png
+[Travis]: https://travis-ci.org/kubernetes/kubernetes
+[Travis Widget]: https://travis-ci.org/kubernetes/kubernetes.svg?branch=master
+[Coverage Status]: https://coveralls.io/r/kubernetes/kubernetes
+[Coverage Status Widget]: https://coveralls.io/repos/kubernetes/kubernetes/badge.svg
 
 ### Are you ...
   * Interested in learning more about using Kubernetes?  Please see our user-facing documentation on [kubernetes.io](http://kubernetes.io)