Conflict with Unveil.js

[sulian]

The BoostCake plugin isn't compatible with the jQuery script "unveil.js".

Unveil.js use the data-src tag ; this tag is deleted in the BoostCakeHtmlHelper.php, line 67 (holder.js compatibility ?)
Temporary solution is to delete theses lines :

if (isset($options['data-src'])) {
unset($options['data-src']);
}