Please tag releases

[htgoebel]

The github repository does not contain any tags from release versions. This makes it very hard to e.g. view differences between releases. Also tags are the base for "releases" at github which allow uploading release-archives.

Please add the tags, even if the date would be "incorrect". See
https://stackoverflow.com/questions/4404172/how-to-tag-an-older-commit-in-git. If yo like, you could back-date the ags setting GIT_COMMITTER_DATE, see https://stackoverflow.com/questions/21738647

Thanks.