A method for easily stacking multiple icons. Use the fa-icon-stack class on the parent and
fa-icon-stack-base for the bottom icon.
fa-icon-twitter on fa-icon-unchecked
fa-icon-flag on fa-icon-circle
fa-icon-terminal on fa-icon-square
fa-icon-camera on fa-icon-ban
{% highlight html %}
fa-icon-twitter on fa-icon-unchecked
fa-icon-flag on fa-icon-circle
fa-icon-terminal on fa-icon-sign-blank
fa-icon-camera on fa-icon-ban-circle
{% endhighlight %}