Is there a way to edit/delete Steemit posts? I enjoy the fact that the information and content I choose to share on my steemit account is permanently on the blockchain and cannot be censored, but as time goes on and I look at my past posts I realize that some of my stances have changed. Is the best way to communicate a different message to add information in the form of a reply to my old post, or can I somehow edit the post or delete it entirely?