Make proper release

[andreas-kupries]

Notes

• Release should contain the linenoise sources

From chat

rkeene: aku, One option is to have a "release" branch that corresponds to the contents of the release tarball that forks at the release point, then tag that commit on the release branch

aku: Oh. I see. Make a branch where the linenoise sources are in the repo, and thus automatically in the tarball github will create.

rkeene: Basically create the tarball, create the branch (can Git have multiple branches with the same name ?), then get rid of everything in the branch, and replace it with stuff in the tarball, tag that commit as the release

Note: The above dance gets around github's insistence that the "sources" of a release should be a tagged commit in the repository. They automatically link to the commit and auto-generate archives. The result normally is not a proper release with RE artifacts.