"Finish off any of the simple TODO commented sections" - Done

[helpers/payment]
 - Renamed 'db_transaction_create' to 'db_donation_create'
 - Renamed 'transaction_create' to 'donation_create'

[models/donation]
 - Currency field changed to IntegerField

[models/entity]
 - dict() only returns album and track if they aren't None

[models/payee]
 - 'name' renamed to 'title'

[views/account]
 - When a recipient or payee can't be found we redirect to /account/profile and display an error on screen now.