Flyers restyle & add read more button
Remove path from CSS selectors
CSS linting
Merge pull request #7592 from guardian/flyers-css

Flyers visual changes
Merge branch 'master' of github.com:guardian/frontend into dream-snaps

Conflicts:
	static/src/stylesheets/module/facia/item-tones/_tone-comment.scss
	static/src/stylesheets/module/facia/item-tones/_tone-dead.scss
	static/src/stylesheets/module/facia/item-tones/_tone-editorial.scss
	static/src/stylesheets/module/facia/item-tones/_tone-news.scss