* Feature - Calculate the 'recommended' shipping date for each order based on its delivery date.
* Feature - Added 'shipping_date' and 'delivery_date' filters to the shop order table list to filter the orders by these fields.
* Feature - Send an email to the merchant when a note related with the delivery is added to an order/subscription.
* Tweak - Added setting to deactivate the restriction that limits the available dates in the calendar to the billing interval of the subscription.
* Tweak - Hide the 'Shipping & delivery' section in the checkout page when the customer selects 'Local Pickup' as the shipping method.
* Tweak - Hide the 'Shipping & delivery' section in the checkout page when the 'WooCommerce Ship to Multiple Addresses' extension is used in the checkout page.
* Tweak - Removed the delivery date field placeholder by default.
* Tweak - Use the first delivery date as placeholder in the delivery date field when the date is auto-generated.
* Fix - Fixed 'required field' validation on virtual products.
* Dev - Set the minimum requirements to WP 4.1+ and WC 2.6+.
* Dev - All the checkout content is loaded and refreshed as order-review fragments by AJAX.
