added missing SkyDriveFileStorage C# wrapper

src/Kp2aBusinessLogic/Io/SkyDriveFileStorage.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+using Android.App;
+using Android.Content;
+using Android.OS;
+using Android.Runtime;
+using Android.Views;
+using Android.Widget;
+using KeePassLib.Serialization;
+#if !EXCLUDE_JAVAFILESTORAGE
+using Keepass2android.Javafilestorage;
+
+namespace keepass2android.Io
+{
+	public class SkyDriveFileStorage: JavaFileStorage
+	{
+		private const string ClientId = "000000004010C234";
+
+		public SkyDriveFileStorage(Context ctx, IKp2aApp app) :
+			base(new Keepass2android.Javafilestorage.SkyDriveFileStorage(ClientId, ctx), app)
+		{
+		}
+
+		
+	}
+}
+#endif