update readme

rzcoder · rzcoder · commit 6a1e6c22f464 · 2015-03-04T01:48:54.000+05:00
diff --git a/README.md b/README.md
@@ -292,3 +292,5 @@ In addition, the following condition applies:
 
 All redistributions must retain an intact copy of this copyright notice
 and disclaimer.
+
+[![Build Status](https://travis-ci.org/rzcoder/node-rsa.svg?branch=master)](https://travis-ci.org/rzcoder/node-rsa)
