Add travis-ci status to README

README.md

@@ -3,6 +3,8 @@
 This is a (so far) experimental Golang implementation of the
 [pgeodns](http://github.com/abh/pgeodns) server powering the [NTP
 Pool](http://www.pool.ntp.org/) system.
+[![Build Status](https://secure.travis-ci.org/abh/geodns.png)](http://travis-ci.org/abh/geodns)
+
 
 ## Installation