added the slideshare link

Author: sqshq

README.md

@@ -1,4 +1,4 @@
 # Robot Control System
-Akka Cluster using Java, Spring Boot and Docker. Demo application for the conference talk.
+Akka Cluster using Java, Spring Boot and Docker. Demo application for [the conference talk](https://www.slideshare.net/AlexanderLukyanchiko/actorbased-concurrency-in-a-modern-java-enterprise).
 
 <img width="880" alt="screen shot 2017-05-09 at 16 25 00" src="https://cloud.githubusercontent.com/assets/6069066/26027846/06bff546-381e-11e7-89e3-19382e3a15b2.png">