message: Update to match renamed API
diff: @@ -531,7 +531,7 @@ var TimelinePanel = React.createClass({
  this.last_rr_sent_event_id = lastReadEvent.getId();
  this.last_rm_sent_event_id = this.state.readMarkerEventId;
  - MatrixClientPeg.get().setRoomReadMarker(
  + MatrixClientPeg.get().setRoomReadMarkers(
  this.props.timelineSet.room.roomId,
  this.state.readMarkerEventId,
  lastReadEvent
  