Issue

https://otwarchive.atlassian.net/browse/AO3-5055

Purpose

Adds the GNU GPL version 2 license to the repository, per GitHub's guidelines

Testing

Make sure a file named license is present in the repo

A diff with https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt

Do we mind ?

< Copyright (C) 1989, 1991 Free Software Foundation, Inc.,

Copyright (C) 1989, 1991 Free Software Foundation, Inc., http://fsf.org/
293,294c293,294
< <one line to give the program's name and a brief idea of what it does.>
< Copyright (C)

{description}
Copyright (C) {year}  {fullname}

332c332
< , 1 April 1989

{signature of Ty Coon}, 1 April 1989

It's not in the important terms and conditions bit, so I can't see any reason at all to worry.