Revert "Remove all Slimmer references"

This reverts commit f0225463523ecafd750c654840bfcdf66d579025.

Conflicts:
	Gemfile
	Gemfile.lock
Reorder dotenv load to be before plek
update slimmer and use new template method in action
Move javascripts and stylesheets to static
Move menus to static
Update node badge to fetch assets from static
Update node badge to fetch assets from static
Remove redundant minimal layout. Moved to static.
Remove absolute paths from section images

So we can override with slimmer
Set asset host to static
Remove hardcoded /assets paths
Use standard tag helpers for node badge assets
Remove local static images
Move main application layout to static
Fix misnamed tests
header content in layout
use proper image tag in hero sections
move hero and title back into app
Remove extraneous bar in title
Merge branch 'refs/heads/master' into feature-slimmer

Conflicts:
	app/assets/stylesheets/application.scss
	app/views/content/person.html.erb
	config/sections.yml