Merge branch 'release/4.0.4'

Conflicts:
	README.md

Merge branch 'feature/theme-gem' into develop

Add `_data` files to root for those forkers of the repo

Move image assets in `/assets/images`

Merge branch 'release/3.2.13'

Merge branch 'feature/data-files' into develop

Change navigation links to sample data

Merge branch 'release/3.0.0'

Merge branch 'feature/remove-sample-files' into develop

Reduce config to bare minimum and remove sample content

Merge branch 'feature/documentation-and-demo' into develop

Update docs

Update stylesheets and JavaScript docs

Update docs

Update docs

Update archive layout docs

Update layout docs

Update docs

Reorder docs navigation

Archive v2 "Theme Setup" documentation into docs collection