dvdplayer: double number of frames to try for thumbnails
FIX: [aml] properly handle rotation
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