WinGui: don't ignore the H.264 profile and level when the encoder is QSV.

The QSV encoder can also honor those settings.



git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5888 b64f7644-9d1e-0410-96f1-a4d463321fa5
WinGui: use libhb presets for QSV.

This replaces the built-in QSV presets.



git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5889 b64f7644-9d1e-0410-96f1-a4d463321fa5
libhb: make avformat-based muxers the default.

They've matured enough by now.



git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5890 b64f7644-9d1e-0410-96f1-a4d463321fa5