ajout du debut de l'envoie de message
Merge branch 'master' of https://github.com/ThomasMarques/MessengerCSharp

Conflicts:
	Isima.InstantMessaging/Messaging/SessionController.cs
maj
Merge branch 'master' of https://github.com/ThomasMarques/MessengerCSharp

Conflicts:
	Isima.InstantMessaging.WcfService/ISessionService.cs
	Isima.InstantMessaging.WcfService/Session.cs
	Isima.InstantMessaging/Messaging/SessionController.cs