save befor format dell

tests_hugo/chat_node/README.md

@@ -1,4 +1,5 @@
-https://www.youtube.com/watch?v=o8Fn9BgqoQM
+
+- [socket io multi room chat](http://psitsmike.com/2011/10/node-js-and-socket-io-multiroom-chat-tutorial/)
 
 first time :
 	npm install --save express
@@ -16,3 +17,10 @@ anytime :
 - [ ] automatically add someone to a room
 - [ ] being able to accept or refuse to be added to a room
 - [ ] what to do with message not received ?
+
+```
+-> create_room('create_room', room_name);
+-> change_room('change_room', room_name);
+-> get_room_history('get_room_history', room_name);
+```
+