Add landscape.io health badge

README.md

@@ -7,6 +7,7 @@
 [![# of downloads](https://pypip.in/d/changes/badge.png)](https://crate.io/packages/changes?version=latest)
 [![code coverage](https://coveralls.io/repos/michaeljoseph/changes/badge.png?branch=master)](https://coveralls.io/r/michaeljoseph/changes?branch=master)
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/michaeljoseph/changes/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/michaeljoseph/changes/?branch=master)
+[![Code Health](https://landscape.io/github/michaeljoseph/changes/master/landscape.png)](https://landscape.io/github/michaeljoseph/changes/master)
 
 :musical_note: [Ch-ch-changes](http://www.youtube.com/watch?v=pl3vxEudif8) :musical_note: