Revert "Revert "Merge pull request #4026 from guardian/fronts-respect-grouping-news""

This reverts commit ec17fdb084a715e73b6c00ced73af597dc1c5e8d.
Merge branch 'master' of github.com:guardian/frontend into facia-naming
Introduce the Slice concept to facia
Fix spacing on top of image in the huge story container
Merge branch 'redux-fronts-respect-grouping-news' into facia-naming
Merge branch 'master' of github.com:guardian/frontend into redux-fronts-respect-grouping-news
Merge branch 'redux-fronts-respect-grouping-news' into facia-naming-global
Merge branch 'master' of github.com:guardian/frontend into facia-naming-global

Conflicts:
	common/app/assets/stylesheets/module/containers/_tag.scss
Merge branch 'master' of github.com:guardian/frontend into redux-fronts-respect-grouping-news
Fix spacing issue on top of huge stories
Remification for the nation /cc @phamann
Merge branch 'master' of github.com:guardian/frontend into redux-fronts-respect-grouping-news
Merge branch 'redux-fronts-respect-grouping-news' of github.com:guardian/frontend into redux-fronts-respect-grouping-news
Merge branch 'master' of github.com:guardian/frontend into redux-fronts-respect-grouping-news
Merge branch 'facia-naming-global' of github.com:guardian/frontend into redux-fronts-respect-grouping-news
Merge branch 'master' of github.com:guardian/frontend into redux-fronts-respect-grouping-news
Deprecate the thumbnail pattern and tweak spacing
Spacing tweaks
Merge pull request #4089 from guardian/redux-fronts-respect-grouping-news

Fronts: new logic & rename collections into slices