dvdplayer: fix ass subs for AV_CODEC_ID_ASS after ffmpeg bump to 2.4
AE: only send resample ratio if it was changed
ActiveAE: better 2 duplicate loc than recursive locking and an addition function call, fix after d66354dccada58c5da5ff5d940cd0942b9264a64
Merge pull request #5413 from FernetMenta/ass

dvdplayer: fix ass subs for AV_CODEC_ID_ASS after ffmpeg bump to 2.4
Merge pull request #5417 from FernetMenta/aefixes

AE: optimization and fixes
Remove videoplayer.useframemtdec setting and make it default
[lang] update of internal addon language files
[lang] update of core language files
[lang] update of skin.confluence language files
Merge pull request #5421 from fritsch/multithread

Remove setting for framemtdecoding
omxplayer: Reset codec on flush to stop a stale timestamp from being returned
[rbp] Hardware accelerated resampling

This replaces the format conversion, up/down mixing and resampling code from ActiveAE with a GPU accelerated version.
Should significantly reduce CPU when using paplayer or dvdplayer.

Requires updated firmware
[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.
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
[omx] Report decoded image name