New mediacapture-main Editor's draft (v20160222)

Hi

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

Dated version: 
http://w3c.github.io/mediacapture-main/archives/20160222/getusermedia.html
Living document: http://w3c.github.io/mediacapture-main/

Changes include:

[#301, #292] getSupportedConstraints(): Remove prose about dictionary
member default values
[#306, #288] Explain WebIDL limitation for ConstrainablePattern
[#308] Clarify how the generic applyConstraints algorithm applies to
MediaStreamTracks
[#309, #267] Specify permission model for nested browsing
contexts
[#313, #268] Extend iframe with a new allowusermedia attribute
[#315, #307, #296] Clarify how Capabilites should work

Please review and provide feedback.

Adam (for the editors)