Added Release history

If don't create a first beta release in tags (I don't see this in my pull request, but I create this in my repository see: https://github.com/danielfeelfine/FastGap/releases) you can create manually in your master repository. But I make a point in README, contains link with that release.

After, in other versions, releases or bugfixes for distribute in packs, sounds good if you use a semver (http://semver.org/).