Changed base clock from System clock to Audio Clock - Solves sync for some hardware

Play does not always start in sync - TODO
Fixed A/V sync in audio renderer on the playback start

- Changed SynchCorrection not to drop processed audio information on SetBias()
- Fixed CSyncClock's system clock to audio HW clock switch as the clock source
- Calculate tick delta from system or audio HW time, not from combination of those two
Reworked sync and drift code

Pause and skip are no longer working
Last remaining drift calculation variable removed
Removed the clock tracking and debug data
Removed the clock difference code (AVMult)
Adjustments no longer tracked to simplify code
Clock Adjuster removed as tracking is no longer required
Allow drift targeted to +/- 0.1 ms
Fixed memory leak
Work on Pause and Seek

Logging still remains (and a test to smooth false drift)
Seek (mostly) working - can be broken occasionally Pause Still broken (change in rtStart causes problems)
Flush audio renderer's sync clock on stream format change
Sync improvements on Seek
Pause working (initial code)
Long pause correction
Removing unused code in ::Run - squash this with the pause fixes
Fixes Sync on Seek
Fixed debug info (HW vs. sys) not reset on seek
Moved verbose logging in audio renderer's sync correction under debug log setting