dvdplayer: double number of frames to try for thumbnails
[metadata.tvdb.com] updated to version 1.7.0
FIX: [aml] properly handle rotation
VAAPI: Take more care when probing filters
Merge pull request #5940 from fritsch/vaapi-fixes

VAAPI: Take more care when probing filters
Merge pull request #5778 from phate89/TVDB

[metadata.tvdb.com] Added option to use IMDB ratings if it's possible
dvdplayer: ffmpeg decoder - initialize codec control flags, fixes thumbnail extraction which does not set those members
Merge pull request #5943 from koying/fixamlrotation

FIX: [aml] properly handle rotation
Merge pull request #5942 from FernetMenta/thumb

fix thumbnail extraction
[addons] sync with repo
Set version to development version 15.0 alpha1 and change splash screen