- Remove the preface entirely
- Move the current introduction to a "Description" section
- Move the "Quadrants of computation" to the "Introduction"
- Move the current "Motivation" section to the start of the "Introduction"
- Move the section on "Introspection" higher up in the docs
- Remove the "Concept" column in the Cheatsheet, and add links to each
individual algorithm instead.
- Add a rationale for unpack's name and parameter order
- Add `fold` and `reverse_fold` to the cheatsheet
- Mention the list of all headers in the tutorial
- Add an alphabetical index with everything in the library
- Precise that smaller is better in chart subtitles
- Add benchmarks for std::make_tuple and std::get
