[MSE] Spec updates published

Hi,

I just wanted to let people know that I just published 2 updates to the
Media Source Extension spec and closed the respective bugs.

Bug 17739 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=17739>:
Summary: Updated ISO 14496-12 links to public spec URL
Diffs: http://dvcs.w3.org/hg/html-media/rev/10a69f2adb20


Bug 18389 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=18389>:
Summary:
Updated text to indicate presentation start time is always 0 and removed
format specific "Establishing the Presentation Start Timestamp" sections.
Diffs: http://dvcs.w3.org/hg/html-media/rev/29687c019735

Aaron