Implemented the log on and log off systems

This is a pretty straight forward port of the old version, including the
incredibly hacky server list. But I just need to remember that this is a
prototype.

common/network/network_packet.hpp

@@ -52,6 +52,9 @@ union NetworkPacket {
 		//mass update
 		SYNCHRONIZE = 8,
 
+		//shut down the server
+		SHUTDOWN = 9,
+
 		//Player movement, etc.
 	};
 
@@ -69,6 +72,12 @@ union NetworkPacket {
 		//TODO: player count
 	}serverInfo;
 
+	//information about the client
+	struct ClientInformation {
+		Metadata meta;
+		int index;
+	}clientInfo;
+
 	//defaults
 	NetworkPacket() {
 		meta.type = Type::NONE;