[skin] update re-touched with new Kodi logo
[addons] sync with repo
[gitignore] - add VolumeIcon.icns to gitignore
[osx/packaging] - ensure that our dmg is always mounted with a static name (/Volumes/Kodi in our case) - else the prepared .DS_Store won't work and we don't get the background image and icon position
[osx/packaging] - premade .DS_Store which works for /Volumes/Kodi