Socket client update, added headers to rest result

CryptoExchange.Net/Requests/Response.cs

@@ -1,4 +1,7 @@
-using System.IO;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
 using System.Net;
 using CryptoExchange.Net.Interfaces;
 
@@ -20,6 +23,11 @@ namespace CryptoExchange.Net.Requests
             return response.GetResponseStream();
         }
 
+        public IEnumerable<Tuple<string, string>> GetResponseHeaders()
+        {
+            return response.Headers.ToIEnumerable();
+        }
+
         public void Close()
         {
             response.Close();