YITH WooCommerce EU VAT Premium 2.31.0

* GDPR:
- New: exporting user question and answers data info
- New: erasing user question and answers data info
- New: privacy policy content
* New: option to disable vat exception process for same country (ajax call is not processed and any message showed under the field)
* Tweak: set eu vat fields using woocommerce field filter
* Update: italian Translation
* Update: dutch language
* Update: documentation link of the plugin
* Update: minify js
* Fix: plugin description
* Fix: vat execption is always processed, also if country is disabled
* Dev: Added a filter in the VAT validation response

Update: JS Unminifed version
Fix: Fix a problem with the Greece country code and VAT code
Fix: Fixing the import standard taxes button, now don't delete the previous taxes
Dev: eu vat field print using 'woocommerce_billing_fields' filter

• Update: Compatibility with subscription - remove taxes when vat applied