Updated Media Capture and Streams editor's draft

Hi

A new version of the editor's draft is available.

Dated version: http://dev.w3.org/2011/webrtc/editor/archives/20130429/getusermedia.html
Living document: http://dev.w3.org/2011/webrtc/editor/getusermedia.html  (yes, this shows a date of 20130430 -- this is an artifact of publishing after midnight Boston time, so ignore it)


Changes include:
	• Added readonly and remote attributes to MediaStreamTrack
	• Removed getConstraint(), setConstraint(), appendConstraint(), and prependConstraint().
	• Added source states. Added states() method on tracks. Moved sourceType and sourceId to be states.
	• Added source capabilities. Added capabilities() method on tracks.
	• Added clarifying text about MediaStreamTrack lifecycle and mediaflow.
	• Made MediaStreamTrack cloning explicit.
	• Removed takePhoto() and friends from VideoStreamTrack (we have a separate Image Capture Spec).
	• Made getUserMedia() error callback mandatory.

Please review and provide feedback.

Dan Burnett (for the editors)