use *.html pages
remove public/ dir
docs template edits
style tweaks
button style tweaks
Merge branch '5.0-wip' into 5.0-visuals

Conflicts:
	doc/assets/scss/_sidebar.scss
	doc/assets/scss/docs.scss
	doc/includes/sidebar copy.html
	doc/layouts/default.html
	doc/pages/index.html
	scss/foundation/components/_button-groups.scss
	scss/foundation/components/_buttons.scss
	scss/foundation/components/_split-buttons.scss
	scss/foundation/components/_top-bar.scss