Major Features
- added the commodity_leaf feature: by default, accounts will now include a commodity
as their leaf (eg: Assets:Investments:HOOLI). This is configurable. Simply pass in a
'commodity_leaf: False' in your importer config.
- the source reader (eg: ofx, csv, ...) has now been separated from the importer type
(eg: investment, banking, ...). This allows us easy combining of these.