Add InvoiceItem#item
Add invoice_items and merchant to Item
Add Transaction#invoice
YOLO
Add Customer#transactions
Fix merchant/customer in Invoice
Add first go at favorite_merchant
Add favorite_customer
Clean up
Update favorite_merchant
Update favorite_customer
Add BigDecimal for unit prices
Update prices with BigDecimal
Adding Date
Add Date objects to Invoice Item objects
Add Date objects to Transaction objects
Finish adding Date
Clean up merchant
Merge pull request #9 from wfro/more-bi

More bi