Woocommerce Shipment Tracking 2.5.2

* Fix - Some tracking information was using billing postcode instead of shipping.
* Fix - WooCommerce 3.0 compatibility.
* Update - Removed some legacy code related to storage of tracking data that is no longer needed.

* Update - Swedish Postal name and tracking link.

* Enhancement - Support for adding or updating tracking information via Customer / Coupon / Order CSV Import
* Fix - Incorrect DHL US URL format
* Enhancement - Added translations for fr_FR