Sylvia/docs/ora 65

@mhoeber @lamagnifica @stephensanchez @wedaly @gradyward Please review. This is a draft so things may be a little rough around the edges, and I have a couple of notes to myself inline.
@srpearce Thanks! Apologies, I was testing on Steve's sandbox as per Monday's instructions, so this comment is out-of-date. The new message and highlighted boxes solve this issue exactly!