General Public License

The %JM macro 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, version 3 of the License.                                

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. 

Everyone is permitted to copy and distribute verbatim copies of this program, but changing it is not allowed.