EDIT: This file has been moved to woocommerce/includes/wc-template-hooks.php
Fully customizing WooCommerce did not make sense to me until I finally tracked down this file: /wp-content/plugins/woocommerce/woocommerce-hooks.php.
This file lists all of the hooks and all of the actions that are added to the hooks. So, if you’ve ever tried searching through the rather abstracted template files and not be able to find what you’re looking for to customize, check out the woocommerce-hooks.php file.
I didn’t find any direct mention of this file in the docs, so hopefully the 2.0 WooCommerce docs will have this file at least mentioned as the place to go to see the default loading of actions.
Have to say though, that once found, everything was super clear to figure out, so big thanks to the dev team for clean coding!