Update Czech translation by Marek Cernocky
Update Czech translation by Marek Cernocky

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