Merge pull request #5 from yallop/video

Add a link to the OCaml 2016 talk.

README.md

@@ -6,6 +6,10 @@ A [libtls][libtls]-compatible wrapper for [ocaml-tls][ocamltls], as described in
       Enguerrand Decorne, Jeremy Yallop and David Kaloper-Meršinjak  
       (presented at [OCaml 2016][ocaml2016])
 
+and in the following talk:
+
+      [![OCaml inside: a drop-in replacement for libtls (OCaml 2016)](https://img.youtube.com/vi/aWlazAuy1F0/0.jpg)](https://www.youtube.com/watch?v=aWlazAuy1F0) 
+
 #### Build status
 
 Build status: Travis: [![Travis build Status](https://travis-ci.org/mirleft/libnqsb-tls.svg?branch=master)](https://travis-ci.org/mirleft/libnqsb-tls)