core: Add closure table to speed up object lookup
core: Add closure table to speed up object lookup

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