Re-enable drag and drop for price fields (not fully working yet). #1066
First pass at EDD_Emails class. #1810
Add email templates class. #1810
Massive rework of emails for EDD_Emails. Definitely not working yet. #1810
Payment subtotal amount fixed

Function edd_get_payment_subtotal() should return the amount without any
discounts applied, that means it can not take total amount and just
subtract the taxes, like it was doing.
Fix for issue with wrong price, tax and discount when quantity greater than 1 and tax is applied after discount.
Add initial EDD_DB class based off of the DB base class from AffiliateWP. #2256
First pass at the EDD_DB_Customers class. #2256
Add payment_ids column and remove unneeded defaults. #2256
Setup customers table to be created during install. #2256
Simplify add(). #2256
Rework existing EDD customers report table to use new customers DB. #2256
Add name column to DB. #2256
Rename cache group to just customers. #2256
Rework edd_get_purchase_stats_by_user() to use the new  customer API. #2256
Rework edd_count_total_customers() to use new customer API. #2256
Remove no-longer valid PHPDoc for edd_count_total_customers(). #2256
Update EDD_Customers_Export class to use new customer API. #2256
First pass at upgrade routine for #2256
Swap mixed up columns. #2256