don't unsubscribe redis observer until all clients unsubscribe
don't unsubscribe redis observer until all clients unsubscribe

jclem/livedb,dialoghq/livedb,mcanthony/livedb,bsnote/livedb,share/livedb,mattbrun/livedb,k-components/k-livedb,nmai/livedb,matthewbauer/livedb