Add column to store orders index to show refunded amount for each order
Merge master into refunds-finishing-up branch

Merge branch 'master' of https://github.com/jmejia/daughter_of_store_engine into refunds-finishing_up
Merge branch 'master' of https://github.com/jmejia/daughter_of_store_engine into refunds-finishing_up
Merge pull request #18 from jmejia/refunds-finishing_up

Refunds finishing up