* remove redundant resize instruction from guide
* amend past code pruning to fully cover acceptance period
* update guide again
* note on return value of `validation_code_at`
* rename execution cores to availability cores
* clarify terminology
* add ReplacementTimes to the guide
* fully decouple inclusion and scheduler
* clarify parathread scheduling substantially
* clarify validator group selection
* add dummy parachains.toml
* flesh out parachains.toml
* finish phase-1 rendering
* render to svg instead
* put graphviz svg through sanitizer so github can render
* return to PNG