core: Port to new DIDL-Lite contributor APIs
core: Port to new DIDL-Lite contributor APIs

Tarnyko/rygel,GNOME/rygel,Tarnyko/rygel,Pelagicore/Media-Manager-Rygel-patched,luisbg/rygel,GNOME/rygel,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,jku/rygel,Pelagicore/Media-Manager-Rygel-patched,jku/rygel