implemented encrypted Tactics archives.

ArcFormats/Tactics/WidgetTactics.xaml.cs

@@ -0,0 +1,21 @@
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Windows.Controls;
+using GameRes.Formats.Properties;
+using GameRes.Formats.Tactics;
+
+namespace GameRes.Formats.GUI
+{
+    /// <summary>
+    /// Interaction logic for WidgetTactics.xaml
+    /// </summary>
+    public partial class WidgetTactics : StackPanel
+    {
+        public WidgetTactics()
+        {
+            InitializeComponent();
+            Title.ItemsSource = Arc2Opener.KnownSchemes.OrderBy (x => x.Key);
+        }
+    }
+}