Contract 0.19.0

ADDED = RECORDED. The watch/follow distinction is gone: adding a player or clan starts collection within your tier's slots, and the only per-subject setting is notify (does it feed your event pipe). elixir_add_player and elixir_add_clan replace the watch tools (actions add/remove/notify_on/notify_off); slots now count what you've ADDED; the push lane fans out only to notify-on subjects.