Facebook for WooCommerce v2.0.0

• Tweak - Show Facebook options for virtual products and variations
• Tweak - Hide "Sync and show" option for virtual products and variations
• Tweak - On upgrade, automatically set sync-enabled and visible virtual products and virtual variations to Sync and hide
• Tweak - Allow to bulk enable sync for virtual products, but automatically set them to Sync and hide
• Fix - Use the plugin version instead of a timestamp as the version number for enqueued scripts and stylesheets
• Fix - Use the short description of the parent product for product variations that don't have a description or Facebook description
• Fix - Prevent an error when YITH Booking and Appointment for WooCommerce plugin is active