Load YAML as binary data
Load YAML as binary data

This lets the YAML library itself deal with the encoding (mostly), which
should address #2456 and #2565, which have to do with `open` giving us a
system-specific encoding by default on Python 3 on Windows when the files
should have been written using UTF-8 per the YAML standard.

ibmibmibm/beets,shamangeorge/beets,pkess/beets,jackwilsdon/beets,pkess/beets,beetbox/beets,sampsyo/beets,SusannaMaria/beets,ibmibmibm/beets,beetbox/beets,beetbox/beets,shamangeorge/beets,shamangeorge/beets,SusannaMaria/beets,pkess/beets,ibmibmibm/beets,shamangeorge/beets,SusannaMaria/beets,beetbox/beets,ibmibmibm/beets,jackwilsdon/beets,sampsyo/beets,sampsyo/beets,sampsyo/beets,pkess/beets,SusannaMaria/beets,jackwilsdon/beets,jackwilsdon/beets