Déconnection d'un utilisateur
Déconnection client. Fin Sprint 2.
Merge branch 'master' of
https://github.com/mohamedBL/chatIRC-RCAS-MSAI-.git

Conflicts:
	FisrtIRCStarterWithUI/src/com/cfranc/irc/server/ClientConnectThread.java
	FisrtIRCStarterWithUI/src/com/cfranc/irc/ui/SimpleChatClientApp.java
merge alors
remerge
Merge branch 'master' of https://github.com/mohamedBL/chatIRC-RCAS-MSAI-.git