chriscct7/woocommerce — pull request #2 by chriscct7 (2012-09-22 21:10:42+00:00)
Title: added sales by coupon report

initial version of sales by coupon report. Since multiple coupon codes
for a single order are stored comma separated, this report considers
them as 1 coupon. Handling multiple coupons within an order as
individual coupons with the report would be quite a bit more complex --
I think most stores force individual use on coupons anyway.