Build heartbeat chain

MistoxServer/mPacket/ResevedPackets.cs

@@ -41,6 +41,7 @@ namespace Mistox.ResevedPackets {
     // Packet sent to all clients when a global position update occurrs
     [mPacket]
     public class HeartbeatPacket {
+        public Vector3 Position { get; set; }
         public List<UserTableObject> ServerList { get; set; }
     }