git tags and release notes

[sckott]

we're trying to get all ropensci pkgs to use git tags and release notes, as it's common software practice.

In our packaging guide we have some notes on this https://github.com/ropensci/onboarding/blob/master/packaging_guide.md#-news

We'd like each repo to have a git tag associated with each cran release and then the news items for that cran release on the releases tab of your repo. After you do the git tag, you'll then be able to go to Releases tab and edit the release notes for the git tag putting in your news items

e.g. of release notes https://github.com/ropensci/taxize/releases

thanks!

[tpaskhalis]

@sckott thank you for the suggestion! I back-tagged the first two CRAN releases. Will do that from now on for the future releases.