Set sales_quote_item field "wee_applied_tax" on the free product to prevent warnings during invoice creation.
Optimize Indentation, Linebreaks and Returns due to suggestions of Magento Judge.
Merge commit '293021251bac87ae5849fd8ff5c080c743e1cb94'
Update README.md
Update README.md
Take over is_free_product flag when reordering to remove the free product properly before re-adding it via sales rule.