Add license (GPLv3+) and usage
-rw-r--r-- 35147 COPYING3
-rwxr-xr-x 2122 check-release
-rwxr-xr-x 1964 mkgitrel
-rwxr-xr-x 4455 mkgitrel.cln
-rwxr-xr-x 3049 mkgitrel.pub
-rwxr-xr-x 3135 mkgitrel.rel