facmp: File proto for comparing what we read with a local file
ftp: Make FTP client more robust
fix build break
rpi: Add missing file rpi_pixmap.h
Rework subtitle provider ordering

It's now possible for the user to freely select the order in which
subtitles should appear.

It's also possible to select on a per-provider base if the provider
should be candidate for automatic selection by Showtime itself

Fixes #1535
subtitles: Add support for a central subtitle folder
Fix an incorrect property unsubscription resulting in crashes in JS code