Add HipChat notification

[asmith-mdsol]

To complement GitHub PR status notifications, also support HipChat notifications. There's evidence that people are wasting a lot of time struggling to get the Jenkins plugin to work; we can centralize the solution here.

[jshraibman-mdsol]

I'm not sure what Kinder is but I did use the Hipchat gem when building Bilgerat. It is pretty easy to use. I can do this when I can dedicate the time for it.

[asmith-mdsol]

Thanks for the offer and the reference @jshraibman-mdsol! Kender is a gem that wraps up standard CI process so you just run rake ci in Jenkins (or wherever) and you don't need 101 Jenkins plug-ins to do everything else. See the README for a full run-down.