Add since tags.
Summary:
I hate having to look up when interesting new classes were added.
Patch is straight-forward (I think), but:
- should @since be added on all memebers, when it's already on the class?
- would simple patches such as this be ok to commit without review?
Reviewers: Frameworks, dfaure
Reviewed By: dfaure
Subscribers: dfaure, cfeck
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D6122