implemented PAZ archives (#18)

ArcFormats/Musica/WidgetPAZ.xaml.cs

@@ -0,0 +1,18 @@
+using System.Linq;
+using System.Windows.Controls;
+using GameRes.Formats.Musica;
+
+namespace GameRes.Formats.GUI
+{
+    /// <summary>
+    /// Interaction logic for WidgetPAZ.xaml
+    /// </summary>
+    public partial class WidgetPAZ : StackPanel
+    {
+        public WidgetPAZ (PazOpener paz)
+        {
+            InitializeComponent();
+            Scheme.ItemsSource = paz.KnownTitles.Keys.OrderBy (x => x);
+        }
+    }
+}