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/>.