Add a LICENSE file.

[shlomif]

Hi all! Please merge this commit with a "LICENSE" file.

It is for CPANTS Kwalitee, GitHub etiquette, good measure and for Great
Justice!

[adherzog]

👍

[leonerd]

I dislike this.

Does EU::MM not have an equivalent to Module::Build's "just make me a LICENCE file" option? I use that and don't have to worry about this issue in my other >100 dists.

[shlomif]

@leonerd: I'm not aware of such an option in EU::MM but note that I try to avoid raw EU::MM as much as possible and prefer Module::Build and especially Dist-Zilla. I don't see anything for generating a LICENSE file here - https://metacpan.org/pod/ExtUtils::MakeMaker .