Feature/userdata tracker (#271)

Added user data tracking logic
Added LastReceiveTime, SocketStatus and SubscriptionStatus properties to UpdateSubscription
Added SharedTransferStatus Enum and property to SharedDeposit
Added PositionMode property to SharedPosition model
Added IsZero property to SharedQuantity
Renamed IWebSocket LastActionTime to LastReceiveTime
Updated CryptoExchangeWebsocketClient LastReceiveTime logic
Updated Subscription status change event handler to run sync instead of separate task

CryptoExchange.Net/Objects/AsyncResetEvent.cs

@@ -95,6 +95,10 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         public void Set()
         {
+            if (!_autoReset && _signaled)
+                // Already signaled and not resetting
+                return;
+
             lock (_waitersLock)
             {
                 if (_autoReset)

CryptoExchange.Net/Objects/Sockets/UpdateSubscription.cs

@@ -109,6 +109,21 @@ namespace CryptoExchange.Net.Objects.Sockets
         /// </summary>
         public int Id => _subscription.Id;
 
+        /// <summary>
+        /// The last timestamp anything was received from the server
+        /// </summary>
+        public DateTime? LastReceiveTime => _connection.LastReceiveTime;
+
+        /// <summary>
+        /// The current websocket status
+        /// </summary>
+        public SocketStatus SocketStatus => _connection.Status;
+
+        /// <summary>
+        /// The current subscription status
+        /// </summary>
+        public SubscriptionStatus SubscriptionStatus => _subscription.Status;
+
         /// <summary>
         /// ctor
         /// </summary>