Add woocommerce_delete_product_transients action
Merge pull request #3849 from franticpsyx/use_additional_transients

Add woocommerce_delete_product_transients action
Increment later. Closes #3811.

@coenjacobs .15
Remove html5 number inputs (unreliable at present, locale issues), add JS validation for price inputs. New price input type in settings API to make future changes easier to implement. Closes #3587

@coenjacobs hows this look?
Fix get_base_country Closes #3851