YITH WooCommerce Affiliates Premium 3.15.0

* New: WooCommerce 3.6.0 RC1 support
* New: admin can now disable Click handling
* New: current affiliate shortcode
* New: admin can now regenerate invoice for affiliates
* New: admin can now assign coupons to affiliates
* New: affiliates can receive commissions by coupons
* New: email sent when admin assign a coupon to an affiliate
* Update: internal plugin framework
* Update: Spanish language
* Tweak: improved withdraw handling
* Fix: change Generate Link URL in customer emails
* Fix: default value for new_status and old_status in email class
* Fix: billing country on invoices
* Fix: fixed issue with hidden sections (generate link not removed from affiliate dashboard menu)
* Fix: DB error on backend
* Dev: added new filter yith_wcaf_prepare_items_commissions

• New Added yith_wcaf_show_withdraw shortcode
• New Email sent to affiliates when account is banned
• Tweak Updated plugin framework
• Tweak Improved layout of the Withdraw template
• Tweak Improved email sent when affiliate account changes status
• [updated] Dutch language
• Fix Minor issues introduced with last update

* New: support to WooCommerce 3.5-RC1
* New: support to WordPress 4.9.8
* New: updated plugin framework
* New: added new Reject status for affiliates
* New: affiliates receives an email on account status change
* New: added commissions Trash
* New: affiliates can now request commissions withdraws
* New: affiliates can now upload invoices for their withdraw requests
* New: affiliates can now generate invoices for their withdraw requests
* New: added affiliate details page
* Fix: affiliate backend creation
* Fix: fixed some queries on various admin views
* Tweak: improved balance calculation
* Dev: added filter get_referral_url filter