* Fix - Use KG for weight and CM for dimension to make Aramex happy.
* Tweak - Added settings, doc, and support in plugin action links.
* New - Added the new Woo plugin header, for WooCommerce 3.1 compatibility.
* Enhancement - Added shipping zones support.
* Enhancement - Removed availability and countries settings that's no longer needed with shipping zones.
* Fix - Bunch of notices/warnings/errors caused by deprecated API being used.
* Fix - Issue where WSDL location could not be found by SoapClient.
* Fix - Issue Test Mode doesn't work.
* Fix - Incorrect use of box packing method.
* Fix - Deprecated API from WC still used.
* Fix - Issue where rates might not returned.
* Fix - Issue where request pickup might not work in edit order screen.
* Tweak - Better logging mechanism when debug is enabled. It now displays the debug message on the front-end if current user is administrator (or has capability `manage_options`).
