* New: Added new carrier Zaslat
* Tweak: integration with YITH WooCommerce Multi Vendor, allow always to administrator to manage order tracking info of a suborder
* Tweak: support for WP_Post object type in add tracking metabox
* Update: Updated Dutch language
* Update: updated GATI tracking URL
* New: support WooCommerce 3.7
* New: added new carrier Pošta Slovenije
* Update: updated SDA Italy tracking URL
* Update: updated Spanish translation
* Update: updated Italian translation
* Update: updated language file
* Dev: adding the shortcode strings to the text domain
New: added a new shortcode with a form to check the tracking info with the order ID
New: new column in the order list with the order tracking info
New: carrier DHL Parcel UK
New: carrier DX Delivery
New: carrier DHL eCommerce
New: carrier pickupp
Update: Dutch language
Update: updated plugin core
Update: updated Elta Courier
Update: updated Envialia Courier
Dev: set the get_track_url function to public
