add David (david-dm.org) badge to monitor currentness of dependencies

diff --git a/README.md b/README.md
index 03f8f3362bf503fb9bedfdc48fb0edcad2872478..1915fb9ff4c1f5a88e10fd8d90f5c31fba9f03d3 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# [Bootstrap](http://getbootstrap.com) [![Build Status](https://secure.travis-ci.org/twbs/bootstrap.png)](http://travis-ci.org/twbs/bootstrap)
+# [Bootstrap](http://getbootstrap.com) [![Build Status](https://secure.travis-ci.org/twbs/bootstrap.png)](http://travis-ci.org/twbs/bootstrap) [![devDependency Status](https://david-dm.org/twbs/bootstrap/dev-status.png)](https://david-dm.org/twbs/bootstrap#info=devDependencies)
 
 Bootstrap is a sleek, intuitive, and powerful front-end framework for faster and easier web development, created and maintained by [Mark Otto](http://twitter.com/mdo) and [Jacob Thornton](http://twitter.com/fat).