Add header.

Aaru.Gui/ViewModels/Windows/ImageChecksumViewModel.cs

@@ -1,3 +1,35 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : ImageChecksumViewModel.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : GUI view models.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     View model and code for the image checksum window.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General public License for more details.
+//
+//     You should have received a copy of the GNU General public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2020 Natalia Portillo
+// ****************************************************************************/
+
 using System;
 using System.Collections.ObjectModel;
 using System.Reactive;