Expose MasterServerClient to script

Script/Packages/Atomic/Network.json

@@ -2,5 +2,5 @@
 	"name" : "Network",
 	"sources" : ["Source/Atomic/Network"],
 	"includes" : ["<Atomic/Network/Protocol.h>", "<Atomic/Scene/Scene.h>"],
-	"classes" : ["Network", "NetworkPriority", "HttpRequest", "Connection"]
+	"classes" : ["Network", "NetworkPriority", "HttpRequest", "Connection", "MasterServerClient"]
 }