Added navigation logic

FoxTube.Core/Models/PageView.cs

@@ -0,0 +1,17 @@
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Navigation;
+
+namespace FoxTube.Core.Models
+{
+    public class PageView : Page
+    {
+        public string Header { get; set; }
+        public object Parameter { get; private set; }
+
+        protected override void OnNavigatedTo(NavigationEventArgs e)
+        {
+            base.OnNavigatedTo(e);
+            Parameter = e.Parameter;
+        }
+    }
+}