* Add H and Section components for context-aware headings
* Switch to using the new context-aware heading and section components
* Style header by class name, not heading level
* Add our client dir to the modules list for Jest
We already have this setting in webpack, but Jest doesn’t pick up on that
* Add CSS naming conventions following Gutenberg’s standards
* Update `woo-dashboard` to `woocommerce-layout`
* Update admin notice container to new classname standard
* Add agenda widget with accordion
* Add AgendaItem, README, and do some cleanup
* Handle PR Feedback: Rename AgendaAccordion to AgendaGroup, accept an href prop for a non-accordion state. Accept onClick or href for AgendaItem, a11y fixes, fix some typos, update examples & README.
* Address PR Feedback: Rename AgendaGroup to AgenaHeader, use a direct link for href mode, use IconButton instead of Button & Dashicon, pull out link rendering to its own method. Use <Link /> for app links.
* Combine box-shadow focus/hover rule and add transparent background
* Make `count` optional
Kelly Dwan
Justin Shreve