make the format correct.

README.md

@@ -39,6 +39,7 @@ OPTIONAL - Rebuilding the generated code
 1 First [install protoc](https://github.com/google/protobuf/blob/master/INSTALL.txt)
   - For now, this needs to be installed from source
   - This is will change once proto3 is officially released
+
 2 Install the protoc Go plugin.
 ```sh
 $ go get -a github.com/golang/protobuf/protoc-gen-go