Merge pull request #924 from nicolasnoble/travis-badge

Adding a Travis badge.
diff --git a/README.md b/README.md
index 8fa9fa4..fa60b83 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Build Status](https://travis-ci.org/grpc/grpc.svg?branch=master)](https://travis-ci.org/grpc/grpc)
+
 [gRPC - An RPC library and framework](http://github.com/grpc/grpc)
 ===================================