Make RSS timestamp & callno. less significant
RSS page mobile styles
Content and sidebar mobile styles
Move RSS feed margins out
Set max-width on content-main li elements

Shooting for a 66 character line-length
Add alt text for SVG link
Reorder mixins in utility.scss
Set line-length in body-text mixin, use in RSS
Set rem-fallback
Set multi value rem fallback mixin
Delete icons Sass partial
Merge branch 'rss-pages' into 404-styling

Conflicts:
	css/build/global.css
	css/build/minified/global.css
	css/build/prefixed/global.css
	css/modules/_utility.scss
	css/partials/_base.scss
Delete icons sass partial