Merge pull request #4926 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
diff --git a/README.md b/README.md
index f894def..033e09b 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 [gRPC - An RPC library and framework](http://github.com/grpc/grpc)
 ===================================
 
+[![Join the chat at https://gitter.im/grpc/grpc](https://badges.gitter.im/grpc/grpc.svg)](https://gitter.im/grpc/grpc?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
 Copyright 2015-2016 Google Inc.
 
 #Documentation