Add char-icon and step-slug patterns
Merge from upstream

Conflicts:
	static/css/main.ie.min.css
	static/css/main.min.css
Add PDF icon to available icon-links
Merge from upstream

Conflicts:
	static/css/main.ie.min.css
	static/css/main.min.css
Update step-slug pattern
Merge pull request #212 from Scotchester/gh-pages

Add char-icon and step-slug patterns
Merge from upstream.