YITH Amazon S3 Storage for WooCommerce 1.19.0

Tweak: improvement of displaying the settings
Tweak: filter to choose whether to download the file from PHP or JS
Fix: load plugin textdomain
Fix: display correctly amazon urls of srcset
Dev: loading admin and frontend classes without PHP sessions

Tweak: setting the Amazon base url for all kind of credentials
Fix: changing string temporarlly to temporary

New - Support to WooCommerce 3.3.1
Tweak - Download links without javascript
Tweak - Customize the link of the order under the user account