- Add mpeg2 "Standard Target Decoder" clock recovery to the low level mpeg stream...

- Add mpeg2 "Standard Target Decoder" clock recovery to the low level mpeg stream reader so we don't have to guess about the clock in sync.
- Since sync now has a fairly reliable clock, make it just trim excess audio or video and fill holes so that we maintain cross media sync.
- Redo the TS-to-PS transmuxing code to work on smaller units so that we can reliably convert the TS clock (PCR) to a PS clock (SCR).

git-svn-id: svn://localhost/HandBrake/trunk@1341 b64f7644-9d1e-0410-96f1-a4d463321fa5