Interop: Input/output paths are now encoded to UTF-8. Removed references to hb_list_s, using the list functions to create and modify them. Added support for specifying the scaling method, QSV preset and DXVA decoding.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5836 b64f7644-9d1e-0410-96f1-a4d463321fa5