Web Authentication: A Web API for accessing scoped credentials

2016-06-01: ACTION-2053 Shane to review.
2016-08-03: APA discussion during 3 Aug 2016 actions review. Request A11Y impacts section during discussion at TPAC.
2016-08-04: Draft comment language starting an email thread.
2016-08-10: Discussion in 10 August 2016 APA teleconference.
2016-09-02: Renamed to Web Authentication: An API for accessing Scoped Credentials. Relevant notes continue there.