New mediacapture-main Editor's draft (v20160423)

Hi

A new dated version of the Editors' draft is available.

Dated version:
http://w3c.github.io/mediacapture-main/archives/20160423/getusermedia.html
Living document: http://w3c.github.io/mediacapture-main/

Changes include:
* [#333] Restrict devicechange event to apps with list-devices permission
* [#338] Make ended event a simple event
* [#342] Remove obsolte error names table
* [#343] Clarify language around stored permission and revocation
* [#345] Issue 316: add links to constrainable properties


Please review and provide feedback.

Dan (for the editors)