Added missing copyright info

htdocs/opensurvey/public/choix_autre.php

 <?php
 /* Copyright (C) 2013      Laurent Destailleur <eldy@users.sourceforge.net>
+ * Copyright (C) 2014 Marcos García				<marcosgdf@gmail.com>
  *
  * 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

htdocs/opensurvey/public/create_survey.php

 <?php
 /* Copyright (C) 2013      Laurent Destailleur <eldy@users.sourceforge.net>
+ * Copyright (C) 2014 Marcos García				<marcosgdf@gmail.com>
  *
  * 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

htdocs/opensurvey/public/studs.php

 <?php
 /* Copyright (C) 2013      Laurent Destailleur <eldy@users.sourceforge.net>
+ * Copyright (C) 2014 Marcos García				<marcosgdf@gmail.com>
  *
  * 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