New mediacapture-main Editor's draft (v20160406)

Hi

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

Dated version:
http://w3c.github.io/mediacapture-main/archives/20160406/getusermedia.html
Living document: http://w3c.github.io/mediacapture-main/

Changes include:

- [#318] MediaStreamTrack.stop(): Address early return for non-locally
sourced tracks
- [#319] Add text that incorporates Permission API's definition of
permission handling.
- [#321] Remove track attributes "remote" and "readonly"
- [#323] Remove unused images
- [#324, #325] editorial fixes
- [#329, #330] Clarify that, with permission, deviceID persists as with
other storage such as cookies but that groupID never persists
- [#331] Use NotAllowedError for permission failure in getUserMedia
algorithm

Please review and provide feedback.
Dan (for the editors)