This program is free software. Different licenses apply to different parts
of the program.

Most of the files are distributed under the conditions of the GPLv3 or any
later versions (see COPYING.GPLv3)

Files in the "tex" directory are distributed under the conditions of the
LPPLv1.3c or any later version.

All files should have a corresponding copyright header, if one is missing
please write the authors to clarify the license.