install keys

ModpackUpdater.Model/ModpackConfig.cs

@@ -6,9 +6,9 @@ public class ModpackConfig
 {
     public bool Maintenance { get; set; }
     public string Name { get; set; }
+    public string Key { get; set; }
     public string UpdateUrl { get; set; }
     public string InstallUrl { get; set; }
-    public bool AllowExtras { get; set; }
 
     [JsonIgnore]
     public string ConfigUrl { get; set; }

ModpackUpdater.Model/ModpackInfo.cs

@@ -11,6 +11,8 @@ public class ModpackInfo
     [JsonConverter(typeof(VersionConverter))]
     public Version Version { get; set; }
     public string ConfigUrl { get; set; }
+    public string ExtrasKey { get; set; }
+
     [JsonIgnore]
     public string LocaLPath { get; private set; }
     [JsonIgnore]