[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:

- Explicitly state that all trun boxes must start with a random access
point in section 8.2.2.

- Changed sentences that started with "queue a task" to "Queue a task".

- Split SourceBuffer.append() algorithm into sub-algorithms to make it
easier to address other open issues:
  * Added "Segment Parser Loop" algorithm to clarify how appended bytes are
collected and processed.
  * Added "Initialization Segment Received" algorithm to hold all
initialization segment processing.
  * Added "Coded Frame Processing" algorithm to hold timestampOffset
adjustments & readyState transitions.

- Added SourceBuffer.remove(). (Bug
18709<https://www.w3.org/Bugs/Public/show_bug.cgi?id=18709>
)

Diffs: http://dvcs.w3.org/hg/html-media/rev/4d013fe2dbec

Aaron