Colophon missing

The .el files in the package should have a line indicating its source / author.

Even if the material is public-domain, the colophon information is useful for users to know where to provide feedback / improvements / corrections, and where to check for updates. You can expect these files to 'travel' and be shared in unexpected ways, and a users may never otherwise know their source.

I suggest at least a single line in each .el file, to include at minimum the url of your repo.