[MSE] Spec updates published

Hi,

I've just posted more changes to the Media Source
Extensions<http://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html>
 spec.

Summary of the changes:

Bug 18666 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=18666>
- Defined what HTMLMediaElement.seekable should return.

Bug 18615 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=18615>
- Defined what HTMLMediaElement.buffered should return.

Bug 18635 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=18635>
- Updated seeking algorithm to run inside Step 10 of the
HTMLMediaElementseeking algorithm.
- Replaced "desired seek point" with "new playback position" to match the
HTMLMediaElement seek algorithm text.

Bug 19300 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=19300>
- Removed transition from "ended" to "open" in the seeking algorithm.

Bug 18590 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=18590>
- Clarified all the event targets.

Diffs: http://dvcs.w3.org/hg/html-media/rev/c3de559a1c37

Aaron