Copyright (C) 2000-2009 Mattia Vaccari Mattia Vaccari University of Padova Department of Astronomy Vicolo dell'Osservatorio 3 I-35122 Padova Italy mattia@mattiavaccari.net http://www.mattiavaccari.net 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 2 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.