Icons
Icons are available via FontAwesome Free v.4.7 and some custom SVG icons available in the images/cornell and images/ui directories. FontAwesome icons can be used with the .fa classes or using the content: declaration in CSS.
Code
FontAwesome HTML
<span class=”fa {fa-icon}”></span>
FontAwesome CSS
content: ‘{fa-icon-character}’;
SVG
Wordpress
<img src=”<?php get_stylesheet_directory(); ?>/images/ui/{svg}” />
Drupal
<img src=”{{ base_path }}/[path/to/theme]/images/ui/{svg}” />
Classes
{fa-icon}
Add the relevant class found on fontawesome.com. Be sure the icon is both "Free" and included in FontAwesome version 4.
{fa-icon-character}
Add the Unicode with a backslash (\) in front of it. Be sure the icon is both "Free" and included in FontAwesome version 4.