WooCommerce Chained Products 3.7.0

* Fix: Bundle price set to zero on cart page (Compatibility issue with WooCommerce Product Bundles)
* Fix: Price always displayed with tax on cart page for product having chained items
* Fix: Don't allow adding a product addon for chained item (Compatibility issue with WooCommerce Product Add-ons) IS#25

* New: WooCommerce 3.5.0 compatible
* Fix: Fatal error "Call to a member function get_id() on boolean"

* Fix: PHP Notice: Undefined variable: override_total
* Update: POT file