Use correct feature colours. Update colour variable names
Merge branch 'master' of https://github.com/guardian/mobile-apps-article-templates into AND-2280-featurecolours

Conflicts:
	ArticleTemplates/css/scss/partials/_aside.scss
	ArticleTemplates/css/style.css
Merge pull request #93 from guardian/AND-2280-featurecolours

Use correct feature colours. Update colour variable names