Add tool to adjust bed topography to achieve target height above flotation - #756

Received event from pull_request, but also received a before(8b985966f68efeafe92e1ca3685bda1559793c00) or after(ae6a639cedeb19d97add1ba5d299740691e22212) value. I am assuming you want to use a Push event but forgot something, so I'm giving you a message.