Added sales price support, conditional syncing based on order status, bug fixes.

	1.	Added sales price checking. The price recorded by WooCommerce,
reported as the line item total, is what is based to FetchApp.
	2.	Removed wc_ prefix on orders and products
	3.	Added correct labels for Order ID vs SKU in admin screens
	4.	Created setting to only push orders with "Completed" status. Added
code to check order status and setting and only push the order to fetch
if they both are set properly.
	5.	Defaulted sync status to "True" when it has not been previously set
Updated ZIP

Updated ZIP for installation