README.md in range_builder-1.0.1 vs README.md in range_builder-1.0.2

@@ -1,6 +1,11 @@
 # RangeBuilder
 
+[![Build History][2]][1]
+
+[1]: http://travis-ci.org/tracksun/range_builder
+[2]: https://secure.travis-ci.org/tracksun/range_builder.png?branch=master
+
 Builds ranges from an enumeration
 
 ## Installation
 
 Add this line to your application's Gemfile: