WooCommerce API Manager 3.4.1

* Tweak: Template overrides for yourtheme/woocommerce/api-keys.php, and yourtheme/woocommerce/api-downloads.php have moved to yourtheme/woocommerce/myaccount/api-keys.php, and yourtheme/woocommerce/myaccount/api-downloads.php
* Fix: The API Manager no longer relies on the woocommerce_downloadable_product_permissions table for download data, but rather only looks for the first Downloadable files URL on the product due to issues described in the following docs. Please read Digital/Downloadable Product Handling - WooCommerce Docs for more information on how adding/changing Downloadable files URLs on products can cause download/update URLs to stop working since WooCommerce 3.0.
* Tweak: Added Product ID to api-keys-order-complete.php email template.
* Tweak: Added Product ID to api-keys.php template.

* REQUIRED: PHP 7.0 and above now a hard requirement.
* Fix: Order screen displayed default Admin account's Master API Key if API Resource for the order did not exist. Now it displays user's Master API Key as expected.
* Fix: Removed wc-am-datetime.php to prevent conflict with core WooCommerce class.
* Fix: Fixed localized time offset for date and time display for activations.

* Fix: Failed data migration introduced in 2.0.2.