Merge pull request #341 from sgoings/add-circleci-badge

fix(README.md): use CircleCI badge instead of TravisCI badge

README.md

 # Deployment Manager
 
-[![Build Status](https://travis-ci.org/kubernetes/deployment-manager.svg?branch=master)](https://travis-ci.org/kubernetes/deployment-manager) [![Go Report Card](http://goreportcard.com/badge/kubernetes/deployment-manager)](http://goreportcard.com/report/kubernetes/deployment-manager)
+[![Circle CI](https://circleci.com/gh/kubernetes/deployment-manager.svg?style=svg)](https://circleci.com/gh/kubernetes/deployment-manager) [![Go Report Card](http://goreportcard.com/badge/kubernetes/deployment-manager)](http://goreportcard.com/report/kubernetes/deployment-manager)
 
 Deployment Manager (DM) `dm` makes it easy to create, describe, update and
 delete Kubernetes resources using declarative configuration. A configuration is
@@ -157,4 +157,3 @@ We use the same [workflow](https://github.com/kubernetes/kubernetes/blob/master/
 DM uses the same concepts and languages as
 [Google Cloud Deployment Manager](https://cloud.google.com/deployment-manager/overview),
 but creates resources in Kubernetes clusters, not in Google Cloud Platform projects.
-