Add a LICENSE file (and refer to it in the README)

[Tyil]

Description of issue

This project currently does not carry a LICENSE. In the spirit of free software I'd like it to adopt a free license clearly in the project root. If possible, refer to the license in the README.md as well.

Since this is something we should decide with all contributors, all of them have been tagged in this issue. Please respond to this issue with the license you are OK with to put on this codebase.

License votes

Contributor	License options
@0racle
@atweiden
@blueyed	(Any)
@cfa	(Any)
@eiro
@grondilu	MIT, GPL, vim
@hinrik	vim, MIT, GPL, BSD
@hoelzro
@itchyny	MIT, (Any)
@KrisShannon
@petdance	vim
@samcv	(Any)
@simmel	ISC, MIT,BSD, (Any)
@tyil	AGPL-3.0, GPL-3.0
@Util

[hoelzro]

@Tyil this is a great idea - I wonder if we technically need contributors' permission first? If not, would you mind drafting a PR to add this to the repo?

[Tyil]

I would've drafter a PR already, but I'm not sure what license it would fall under. I'm personally a big fan of (A)GPL, but I'm not sure what you or other contributors would think about that.

Since the project is currently unlicensed, that mean everyone has to agree on the license picked as well if I'm correct. But I'm not a lawyer, so don't take it as legal advice. I'd like input from all contributors anyway, since it is a community project after all.

[hoelzro]

I think the typical choice for Vimscript is the Vim license itself - I think that you may be right about the "everyone must agree" part =/

[Tyil]

It's 15 contributors. What would be the best way to contact them? Just send everyone an email and hope they respond? We can tag them each in the issue as well, perhaps they'll get a notification about that too.

[hoelzro]

I guess let's try tagging them in this issue - otherwise, trying e-mail would be a good idea.

[Tyil]

ping @0racle, @atweiden, @blueyed, @cfa, @eiro, @grondilu, @hinrik, @itchyny, @KrisShannon, @petdance, @samcv, @simmel, @Util

Please respond with your LICENSE options for this codebase.

[simmel]

I'd prefer a permissive license like ISC, MIT or BSD but I can cave in if everyone else wants something different.

[blueyed]

I am fine with any open license - have not checked, but my contribution is probably very small anyway.

[itchyny]

Good idea to add LICENSE. Personally I'm a fan of MIT but I'll follow the decision of main contributors. My change to this repo is just a nitpick.

[petdance]

Seems to me that we should use whatever license Vim uses, especially if this gets folded into the main vim distribution.

[cfa]

I'm happy with anything—my contribution was minor.

[hoelzro]

FWIW, choosing something other than the Vim license might limit our ability to have changes to this incorporated with the upstream Vim project.

[petdance]

There would have to be a pretty strong argument to NOT use Vim's license.

[grondilu]

I'm ok with MIT, GPL or whatever Vim uses,

[hinrik]

Any of the mentioned choices (Vim, MIT, GPL, BSD...) are fine by me.

[Tyil]

First half of the contributors have responded, thanks for your feedback thus far people!

[samcv]

I'm ok with any any OSI approved software license.