To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
Makes sense to add the license in the header of the files!
Also, I think we need to add some more information about the files there. some small documentation about each module.
README says:
However, most source files say just:
Why include a copyright notice but no mention of a license? :)
This, technically, is OK. But GPLv3 suggests to include a header: