help with CPU.py

[vchhasatia]

Hello class_public team,
I came across the following in the CPU.py (https://github.com/lesgourg/class_public/blob/master/CPU.py) file:
“The “PlanckScale” is taken with permission from Jesus Torrado’s:
cosmo_mini_toolbox, available under GPLv3 at
https://github.com/JesusTorrado/cosmo_mini_toolbox”
It sounds like Jesus Torrado has given you permission to use this code, but it's not clear what license that permission was under. It's also somewhat unusual to see "use freely" as the only license for a project, it's not very clear if that means users can copy, modify, and distribute the project. Just flagging for you as it caused me some confusion.