README.md: add build status

Jason Kridner · Jason Kridner · commit 4eb989455ef1 · 2015-05-07T00:34:39.000-04:00
diff --git a/README.md b/README.md
@@ -1,5 +1,6 @@
 beaglebone-getting-started
 ==========================
+[![Build Status](https://travis-ci.org/jadonk/beaglebone-getting-started.svg)](https://travis-ci.org/jadonk/beaglebone-getting-started)
 
 BeagleBone Getting Started Guide
 
