Add fix for slides sections

Due to how the slides are generated in the DOM, the initial setting of the variable doesn't work. This basically checks if it is undefined and then sets the variable for that section with one few parents
Switch team to list from divs.

Idea from Eddie and made more sense overall since, well, it is a list of people...
Edits to colophon to add people who helped and also consolidate tools
Switch mza, dib to extendable silent classes. Add tac extension
Add extends, abstract out CSS
Add media queries for smaller screens
Commit compiled CSS