WIP: Google Doc and Calendar Feature

Thanks, Marty! In that case, Mark, I'd suggest pointing out that the ID will be in this format. Note that my work calendar ID is spearce@edx.org, but my personal calendar ID is <24-character-hash>@group.calendar.google.com - so we might want to add that the text after the @ sign may be the name of the institution, but I'm not sure of that so it's your call.