This program is free for non-commercial use: see the license file at 
http://cira.ivec.org/dokuwiki/doku.php/difx/documentation for more
details.  This program may be modified and distributed insofar as 
permitted by the license agreement.

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.