Added an option for better screen reader compatibility

IcoMoon's font generator has been updated to allow you to assign your icons to a special block of Unicode called “Supplementary Private Use Area A”. Using this option, your icon fonts will be fully compatible with screen readers and therefore, your CSS-generated content won't be read. Watch a 45s video demo, showing Apple's VoiceOver in action.

With this update, IcoMoon is the first, and currently the only icon font that is fully compatible with screen readers.