Hidden startup, shutodwn and restart

New: Run without console window by default
New: Added NzbDrone.Console to run with console window
New: Shutdown from UI
New: Restart from UI

NzbDrone.Update/AppType.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace NzbDrone.Update
+{
+    public enum AppType
+    {
+        Normal,
+        Console,
+        Service
+    }
+}