Load art for directory content in static lists
overlays: fixed stereo offset of subtitle was applied when not in 3d
overlays: apply stereo offset to all overlay types

This fixes issue #14926

Note: dvd/bluray menu's will not align properly if played back in
a stereoscopic mode after this change, but it's an okey trade off
for now.
[musicdb] If MBIDs exist, try to match the best corresponding artist name on scan. Fixes #14707
ffmpeg backport: VC-1 DXVA2 improvements / Intel compat
fixed, 3d -> 2d in mediacodec
FIX: [droid] logging of python exception
FIX: implement libcurl openssl thread-safe locking
jsonrpc: fix Files.GetDirectory returning wrong type "song" instead of "unknown"
jsonrpc: fix AudioLibrary.GetRecentlyAddedSongs/GetRecentlyPlayedSongs (fixes #14938)
ActiveAE: fix incorrect trigger for transition after: 0f8e85679c55cf23004a87e738e799d3caad7192
Merge pull request #4222 from Montellese/jsonrpc_audiolibrary_fixes

jsonrpc: fix AudioLibrary.GetRecentlyAddedSongs/GetRecentlyPlayedSongs (fixes #14938)
Merge pull request #4213 from jmarshallnz/mbid_to_artist

[musicdb] If MBIDs exist, try to match the best corresponding artist name
Merge pull request #4217 from Montellese/jsonrpc_music_type_unknown

jsonrpc: fix Files.GetDirectory returning wrong type "song" instead of "unknown"
Merge pull request #4209 from elupus/stereoscopic

Stereoscopic subtitle offsets
[ios/atv2] - fix logging of python exceptions - thx to koying for figuring it out
Merge pull request #4214 from Shine-/ffmpegbackportvc1

ffmpeg backport: VC-1 DXVA2 improvements / Intel compat
Merge pull request #4224 from FernetMenta/active

ActiveAE: fix incorrect trigger for transition after: 0f8e85679c55cf2300...
[lang] update of internal addon language files
[lang] update of core language files