WooCommerce API Manager 3.3.5

* Fix: When Master API Key was regenerated in the user profile, the Master API Key was not updated in the wc_am_api_resource or wc_am_api_activation database tables.
* Tweak: Added version to API Resources and API Resource Activations meta boxes on Order screen.
* Tweak: If WooCommerce 2.2 or greater is installed, all expired transients will be deleted on API Manager upgrade.
* Tweak: Prevent caching root/home page URL to prevent API query caching.
* New: Added WC_AM_Cache_Handler class.

* Fix: Only load Storefront My Account CSS if Storefront is the selected theme.
* Fix: PHP warning if api_key value not sent in request for API Information and Update functions queries when the product_id value is a legacy Software Title string.
* Tweak: Minimize CSS files.
* New: Added database caching option to settings.
* New: When enaabled, cache some data for Order screen, and My Account tabs: API Keys and API Downloads.
* New: When enaabled, cache data for API functions: status, information, and update.

* Fix: Fixed several errors in get_api_information_and_update_product_id() method that caused legacy Software Title string API update function queries to fail.
* New: If 'version' key and value are sent in query string to 2.x API functions activate, status, information, or update, or legacy pre 2.0 API functions plugininformation, or pluginupdatecheck, the 'version' for an API Key activation will be updated in the 'wc_am_api_activation' database table.