增加项目，分层

Store.Framework/Configs/ServerConfig.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Store.Client
+{
+    internal class ServerConfig
+    {
+        /// <summary>
+        /// 服务器时间差
+        /// </summary>
+        public static long TimeDifferent { get; internal set; }
+        /// <summary>
+        /// 是否使用新签名算法
+        /// </summary>
+        public static bool IsNewSignatureAuth { get; internal set; } = true;
+
+    }
+}