Add a LICENSE please

[wolftune]

if this had a LICENSE file with a recognized Free/Libre/Open (FLO) license, people could potentially adapt it or improve it, and that could be valuable.

I like AGPL because that requires any use to stay FLO, it doesn't let people use something within a restricted proprietary product. But many people go with the more laissez faire license "MIT" which just says that anyone can do anything.

GitHub has a standard tool to quickly add a license to a repository