Please choose a license for this repo

[mpenning]

Just a friendly reminder that it's quite helpful to choose a good license for your repo.

The current situation (no explicit license in the repo) means that nobody should clone or use this repo to make a derivative work.

That's probably not what you want, but github makes this pretty clear on their licensing page... quoting:

You're under no obligation to choose a license. However, without a license, the default copyright laws apply, meaning that you retain all rights to your source code and no one may reproduce, distribute, or create derivative works from your work. If you're creating an open source project, we strongly encourage you to include an open source license. The Open Source Guide provides additional guidance on choosing the correct license for your project.

Based on your other (licensed) repos, I suspect you'd go for GPLv3...