Correct file headers.

DiscImageChef.Database/Models/OperatingSystem.cs

@@ -1,3 +1,34 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : OperatingSystem.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Database.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Model for storing operating system statistics in database.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library 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
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2018 Natalia Portillo
+// ****************************************************************************/
 using System.ComponentModel.DataAnnotations;
 
 namespace DiscImageChef.Database.Models