WooCommerce Google Product Feeds 11.0.19

* Fix: Layout issues with product feed information box for variations with some other extensions active.
* Fix: Resolve issue which caused a warning to be raised on PHP versions prior to 5.5
* Fix: Resolve issue where WC_Product was not passed to woocommerce_gpf_feed_item filters when background rebuilding the cache
* Fix: Do not generate warning in importer if CSV doesn't include "hide product from feed" column
* New: Allow data to be pre-populated from custom fields through the UI
* New: Allow feed types to be turned on/off
* New: Block access to feeds that aren't enabled
* New: Do not pre-generate cache for feeds that aren't enabled
* New: Introduce woocommerce_gpf_render_item_output_{feed_type} filter for filtering rendered output data

* New: Ship .POT file for easier translations
* New: Template tags now support individual variations
* New: Add performance stats to XML footer if WP_DEBUG enabled
* Fix: Avoid unnecessary output-buffering conflicting with WP Rocket's "remove query strings" functionality
* Fix: Speed & memory optimisations for stores with heavily-variable products

**NOTE** If you have custom code using the WoocommerceGpfFeedItem class, it's definition changes in this release, and your code will need updating.

* New: Introduce template tags for outputting product feed elements on product pages
* New: Support for Bing shipping tags (required in Germany only)