[MSE] SourceBuffer.timestampOffset & MediaSource.duration Spec Updates Published

Hi,

I just wanted to let people know that I have just published new Media
Source Extension spec updates.

Updated Spec:
http://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html

Diffs: http://dvcs.w3.org/hg/html-media/rev/087ea42f59c8

Summary of Changes:
- Added SourceBuffer.timestampOffset attribute & supporting text
- Added MediaSource.duration attribute & supporting text
- Added a definition for the presentation start time and updated various
text to refer to this definition.
- Updated append() algorithm to reflect how the presentation start time is
currently set. (ie the start of the first media segment appended)
- Moved Section 2.10 "Removing Source Buffers" to Section 2.2 so it was
right below Section 2.1 "Creating Source Buffers" and renumbered the rest
of the 2.x sections.

These changes address the following bugs.
https://www.w3.org/Bugs/Public/show_bug.cgi?id=17004
https://www.w3.org/Bugs/Public/show_bug.cgi?id=17071

Please let me know if you have any questions or comments.

Aaron