Added upload and download statistics

client/network/shared/NetworkNode.gd

@@ -2,6 +2,7 @@ class_name NetworkNode
 extends Node
 
 var handlers: Array[Node] = []
+var download := 0
 
 func _init():
 	handlers.resize(256)
@@ -21,3 +22,4 @@ func handle_packet(packet: PackedByteArray, peer: PacketPeer):
 		return
 
 	handler.handle_packet(packet.slice(1), peer)
+	download += packet.size()