Added SEO and ARIA compatibility

[ghost]

It is now possible to have a trigger element and an element which provides the content. Example:

<span class="tooltips" data-tooltip-trigger>Hover for more Information</span>
<span aria-hidden="true" data-tooltip>This information is accessible for search engines and for browsers supporting assistive technology.</span>

[stefangabos]

Isn't the title attribute already ARIA-compatible and SEO friendly? (i don't have any experience with ARIA and that's why i am asking)