implemented Selene 'KCAP' archive format.

ArcFormats/WidgetKCAP.xaml.cs

@@ -0,0 +1,30 @@
+using System.Windows;
+using System.Windows.Controls;
+using GameRes.Formats.Properties;
+using GameRes.Formats.Selene;
+
+namespace GameRes.Formats.GUI
+{
+    /// <summary>
+    /// Interaction logic for WidgetKCAP.xaml
+    /// </summary>
+    public partial class WidgetKCAP : Grid
+    {
+        public WidgetKCAP ()
+        {
+            InitializeComponent ();
+            EncScheme.SelectionChanged += OnSchemeChanged;
+
+            if (null == EncScheme.SelectedItem)
+                EncScheme.SelectedIndex = 0;
+        }
+
+        void OnSchemeChanged (object sender, SelectionChangedEventArgs e)
+        {
+            var widget = sender as ComboBox;
+            var pass = PackOpener.GetPassPhrase (widget.SelectedItem as string);
+            Passphrase.Text = pass;
+            Settings.Default.KCAPPassPhrase = pass;
+        }
+    }
+}