Initial commit for aall article tones. Firct cut at mixin, class names
Review tone, stars as a mixin
Merge branch 'master' into all-the-article-tones

Conflicts:
	article/app/views/fragments/articleBody.scala.html
	article/app/views/fragments/headTonal.scala.html
	article/app/views/fragments/liveBlogBody.scala.html
	common/app/views/fragments/headDefault.scala.html
	common/app/views/fragments/meta/metaInline.scala.html
	common/app/views/support/TrailCssClasses.scala
	static/src/stylesheets/module/content/_live-blog.scss
	static/src/stylesheets/theme/_tones-head.scss
Live and dead blog tones
Live blog tonal header fixes/simplification, showcase image fix
Add byline image to live blogs
Comment icons, comment link positioning in header, main caption padding, live blog meta info
Merge branch 'master' into all-the-article-tones

Conflicts:
	common/app/views/support/TrailCssClasses.scala
Comment tone. Make tonal header common component. All cartoon type to be tonal
Tonal fixes. Always show comment label in .content__head
Tonla blockquotes, fix standfirst if statement
Add letters tone to card style
Add letters to the supported classes on article pages
Tonal header fixes
Merge branch 'all-the-article-tones' of github.com:guardian/frontend into all-the-article-tones
Add letters tone
Fix positioning of avatar on live blogs
Fix colour tonal__standfirst
Refactor organisation of content tone styles, mimics facia
Validate sass, rework selectors and class names