v13.0: remove deprecated function

Re-phase code
Enhance change video quality flow

v12.1

Remove UI temporary since YouTube is changed a lots
Fixed CPU high usage problem (#1)
Update playback quality control method
Update plugin and auto save strategy

v11.1

v11.1.8

minor bugs fixed

v11.0

v11.0.3

fixed bug

v10.4

Optimizing Replayer

v10.3

Minor update

v10.2

change some object reference to this