YITH WooCommerce Zoom Magnifier Premium 2.30.0

* New: Update: plugin framework
* Update: plugin description
* Update: plugin links

* New: Support to WooCommerce 3.5.0
* Tweak: New plugin template
* Update: added an extra class if featured audio video plugin is active
* Fix: zoom gallery and variation chosen
* Dev: added two filter to change the option exclude categories to include
* Dev: added a filter in the ywzm-magnifier register script path

* Tweak: load full image instead of magnifier image
* Tweak: choosing variation
* Tweak: cleaning logs and javascript improvement
* Updated: updated the official documentation url of the plugin
* Update: Italian language
* Update: Spanish language
* Fix: checking if the thumbnails gallery are displayed to add some javascript functionality
* Fix: zoom for variations
* Dev: include 'wp-admin/includes/plugin.php'