implement custom tag (descriptor) feature

allow override of level names through configuration
few small fixes/improvements

SharedLibraryCore/Dtos/PlayerInfo.cs

@@ -11,6 +11,7 @@ namespace SharedLibraryCore.Dtos
         public string Name { get; set; }
         public int ClientId { get; set; }
         public string Level { get; set; }
+        public string Tag { get; set; }
         public int LevelInt { get; set; }
         public string IPAddress { get; set; }
         public long NetworkId { get; set; }