Add build status

README.md

@@ -4,3 +4,5 @@ AssertJ assertions for Joda Time library
 Provides assertions like AssertJ for [Joda Time](http://joda-time.sourceforge.net/index.html), more precisely for [DateTime](http://joda-time.sourceforge.net/api-release/org/joda/time/DateTime.html) and [LocalDateTime](http://joda-time.sourceforge.net/api-release/org/joda/time/LocalDateTime.html) classes, more will come later but that's a start (contributions are welcome to add new assertions !).
 
 Please have a look at the complete documentation in [**assertj.org Joda Time section**](http://joel-costigliola.github.io/assertj/assertj-joda-time.html), including a [**quickstart guide**](http://joel-costigliola.github.io/assertj/assertj-joda-time.html#quickstart).
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+[![Build Status](https://assertj.ci.cloudbees.com/buildStatus/icon?job=assertj-joda-time)](https://assertj.ci.cloudbees.com/job/assertj-joda-time/)