This is a version of the random-state library by Nicolas Hafner (https://github.com/Shinmera/random-state) ported for PWGL (http://www2.siba.fi/pwgl/)
For documentation see: http://shinmera.github.io/random-state/
Copy the entire folder to ~/PWGL-User/User-library and load it with 'Load Library...' under the File Menu.