* Update: Correct spelling of filter, wc_wishlists_udpate_list_args
* Update: Added woocommerce_add_to_cart_validation before an item is added to the cart.
* Update: Added check for Google trying to follow the add to wishlist link.
* Update: If for some reason an invalid product ID is passed to the wishlist handler, it will now just ignore it.
* Update: Remove old WC extension update functions.
* Fix: Send the product URL through the woocommerce_get_product_permalink...