WIP: Documentation for Publishing Changes

Same comment above re: more graceful transition. This feels pretty abrupt to me. Perhaps something like this:

>>Before you transition your traditional course content to an online format, you should understand the building blocks of an edX course. 

>>To begin, you'll arrange your content into a course outline. (One additional sentence about what a course outline is/does.) Course outlines include sections, subsections, and units. Units contain components, which hold all of your content.

>>For more information, see the following topics:

This is just off the top of my head; we might want to point out that sections, subsections, and units are categories only, while components contain the actual content. I feel like we currently throw readers right into the action of creating the outline without telling them what it is and what it includes.