Media Source Extensions

2015-11-18: ACTION-1742 Shane to review.
2015-12-09: 9 Dec 2015 discussion raise with HTML A11Y TF
2016-01-07: Comments sent
2016-03-18: Reply received after discussion.
2016-05-11: Noted haven't processed the last activity, Janina to follow up.
2016-07-07: This spec has gone to CR, but we haven't closed review. ACTION-2069 Janina to follow up.
2016-07-27: Need someone else to review to see if things are dealt with. MC taking over ACTION-2069.
2016-10-04: Has gone to Proposed Recommendation.
2016-11-22: Closing action, hope things are ok.