Changing build badge to BuildKite
-# Cadence [![Build Status](https://travis-ci.org/uber/cadence.svg?branch=master)](https://travis-ci.org/uber/cadence) [![Coverage Status](https://coveralls.io/repos/github/uber/cadence/badge.svg?branch=master)](https://coveralls.io/github/uber/cadence?branch=master)
+# Cadence [![Build Status](https://badge.buildkite.com/159887afd42000f11126f85237317d4090de97b26c287ebc40.svg?theme=github&branch=master)](https://buildkite.com/uberopensource/cadence-server) [![Coverage Status](https://coveralls.io/repos/github/uber/cadence/badge.svg?branch=master)](https://coveralls.io/github/uber/cadence?branch=master)
Cadence is a distributed, scalable, durable, and highly available orchestration engine we developed at Uber Engineering to execute asynchronous long-running business logic in a scalable and resilient way.
