ci: Add build configuration for Travis-CI

Change-Id: I47dacef052596e0e4070f7d4d9b5918cfee982b2
diff --git a/README.md b/README.md
index 3dd3f7f..1d00732 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # jndn-xx-util
 
+[![Build Status](https://travis-ci.org/cawka/jndn-xx-util.svg?branch=master)](https://travis-ci.org/cawka/jndn-xx-util)
+
 Various useful tools
 
 ## License