WooCommerce Gravity Forms Product Add-Ons 3.6.6

* Major Update:
Gravity Form entries are now created when a customer places an order which has gravity forms data as part of it.
See the readme.txt for more details.

* Update: WC 2.7 updates for adding order item meta.
* Update: Adds some basic CSS for multifile upload button.
* Update: Don't list gravity form product name twice when added to the cart, or order placed.
* Fix: Include helper css for file uploaders on product shortcodes.

* Update: Use a custom entry delete function so we don't delete files that are uploaded.

* Update: WooCommerce 2.7 Ready
* Update: Remove gravity form entries after item added to the cart.
The entries are not connected to the actual order in any way and just cause confusion