This software is licensed under the GNU GPL 3 or any later version. 

For details, see the file named COPYING in the top directory of the source or, 
if installed on a Linux system, somewhere in a package named licenses or 
common-licences (or something similar) or yet on the Internet in the following 
page:

http://www.gnu.org/licenses/licenses.html#GPL .

Please note that some parts might go LGPL or even in the public domain in the 
future.