CAddonsDirectory::FileItemFromAddon should take a const AddonPtr &
replace xbmc.python.subtitles extension with xbmc.subtitle.module one
[subtitles] adds new dialog for subtitles to core.
[confluence] changes for new subtitles dialog
[subtitles] set a maximum of 3 languages.
Merge pull request #3552 from jmarshallnz/SubsCore

Move subtitle addon core handling to core.