Review and add images.
Override pre width and margin to prevent wrapping
Standardise titles, lower some text slides.
Change one previously missed diagram
Use CLI to define imports, add options slide
Bring outline slide into line with actual sections
Remove unused diagram
Add various bullet point summaries to diagram slide asides
Adjust some diagram sizes.

This may need tweaking depending on the browser used. I have tried to make the
diagrams as large as possible without going much below the top of the
navigation compass.
Tweaks of Josh's sections