WooCommerce Newsletter Subscription 4.1.1

* Tweak - Moved the subscription field after the terms and conditions in the checkout form.
* Tweak - Hidden the tag (optional) from the subscription field.
* Tweak - Use WooCommerce templates to output the content in the checkout and register forms.
* Tweak - Remove the service provider credentials when uninstalling the extension.
* Tweak - Tested compatibility with WC 4.3.
* Fix - Fixed compatibility with PayPal Express Checkout.

* Tweak - Tested compatibility with WC 4.2

* Feature - Overhauled settings page.
* Tweak - Optimized the initialization of the subscription widget.
* Tweak - Tested compatibility with WC 4.1