Add deprecation notice

Author: morancj

README.md

@@ -1,6 +1,6 @@
 [![Build Status](https://travis-ci.org/microservices-demo/microservices-demo.svg?branch=master)](https://travis-ci.org/microservices-demo/microservices-demo)
 
-# Sock Shop : A Microservice Demo Application
+# DEPRECATED: Sock Shop : A Microservice Demo Application
 
 The application is the user-facing part of an online shop that sells socks. It is intended to aid the demonstration and testing of microservice and cloud native technologies.