Socket client update, added headers to rest result

CryptoExchange.Net/Objects/CallResult.cs

@@ -1,4 +1,6 @@
-using System.Net;
+using System;
+using System.Collections.Generic;
+using System.Net;
 
 namespace CryptoExchange.Net.Objects
 {
@@ -31,9 +33,21 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         public HttpStatusCode? ResponseStatusCode { get; set; }
 
-        public WebCallResult(HttpStatusCode? code, T data, Error error): base(data, error)
+        public IEnumerable<Tuple<string, string>> ResponseHeaders { get; set; }
+
+        public WebCallResult(HttpStatusCode? code, IEnumerable<Tuple<string, string>> responseHeaders, T data, Error error): base(data, error)
         {
+            ResponseHeaders = responseHeaders;
             ResponseStatusCode = code;
         }
+
+        public static WebCallResult<T> CreateErrorResult(Error error)
+        {
+            return new WebCallResult<T>(null, null, default(T), error);
+        }
+        public static WebCallResult<T> CreateErrorResult(HttpStatusCode? code, IEnumerable<Tuple<string, string>> responseHeaders, Error error)
+        {
+            return new WebCallResult<T>(code, responseHeaders, default(T), error);
+        }
     }
 }

CryptoExchange.Net/Objects/ExchangeOptions.cs

@@ -97,6 +97,12 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         public TimeSpan SocketNoDataTimeout { get; set; }
 
+        /// <summary>
+        /// The amount of subscriptions that should be made on a single socket connection. Not all exchanges support multiple subscriptions on a single socket.
+        /// Setting this to a higher number increases subscription speed, but having more subscriptions on a single connection will also increase the amount of traffic on that single connection.
+        /// </summary>
+        public int? SocketSubscriptionsCombineTarget { get; set; }
+
         public T Copy<T>() where T : SocketClientOptions, new()
         {
             var copy = new T
@@ -107,7 +113,8 @@ namespace CryptoExchange.Net.Objects
                 LogWriters = LogWriters,
                 AutoReconnect = AutoReconnect,
                 ReconnectInterval = ReconnectInterval,
-                SocketResponseTimeout = SocketResponseTimeout
+                SocketResponseTimeout = SocketResponseTimeout,
+                SocketSubscriptionsCombineTarget = SocketSubscriptionsCombineTarget
             };
 
             if (ApiCredentials != null)