Space on_replace triggers c api

This seems to be the most requested feature. Currently it can be worked around using lua api, but users really want the native api for performance reasons.

mentioned in issue #30 (closed)

This seems to be the most requested feature

Нужен "заказчик", а пока закрываем

cc @vifley @k.derevtsov

closed

mentioned in merge request !223 (merged)