ffmpeg: bump to 2.4.4
[audioencoders] bump to their latest master

Legacy symlinks in lib/includes need fixing as with them these dont compile.
[keymap] fix guide button for kernel-based mceusb remotes (closes #15374)
[release] bump to 14.0 rc2
Fixed Polish translation of "%s of %s available"
Merge pull request #5868 from perexis/master

[translation] Fixed Polish translation
Merge pull request #5861 from FernetMenta/ffmpeg

ffmpeg: bump to 2.4.4
Merge pull request #5866 from Jalle19/fix-mceusb-lircmap-epg

[keymap] fix guide button for kernel-based mceusb remotes (closes #15374)
Merge pull request #5870 from MartijnKaijser/14.0rc2

[release] bump to 14.0 rc2
Merge pull request #5825 from uNiversaI/audio
[osx] new application icons
[skin] update re-touched skin
Merge pull request #5873 from Memphiz/osxnewicons

[osx] new application icons
[rbp/omxplayer] When opening a stream don't try to update gui so often
[ffmpeg] Speed up wtv index creation

The index creation is O(N^2) with number of entries (typically thousands).
On a Pi this can take more than 60 seconds to execute for a recording of a few hours.

By replacing with an O(N) loop, this takes virtually zero time
adds GetTvShowSeasons
move AddSeason() public.
adds GetArt function to (video) scraper, allowing art to be fetched given the video identifier.

scraper: Fix for losing infotags when artwork grab fails suggested by menakite
refresh season art if a new season is found that isn't recorded in the database yet. Fixes #14339
REMOVEME: updated thetvdb.com scraper to support art updates