Remove redundant term 'filters' in description on reference landing page
Darker widget title text color for reference landing page, per sams
Add overrides to fix bad page font size affecting the mobile header. props otto42
Add versioning to the style.css file. props otto42
Restyle and adjust hook prototypes. props nacin
Standardize on "site-main" class instead of "wrapper"; CSS for alignment and smaller breadcrumbs. props sams
Fix overflow of widgets on mobile and elsewhere. props otto42
Use strrpos() to find last ':' in class method name rather than counting from strpos()
For reference landing page: link to archive of everything introduced in latest version of WP

* List 13 instead of 14 new things
* 14th item is now "View all" link to version archive for latest WP release
* Remove use of shuffle()
Bump CSS versions