No currency on transactions

[marcossantiago]

Hi Guys,

I have stumble upon some Credit Card statements with international purchases. It contains the tags (CURRATE inside CURRENCY), but the parser doesn't look into those, nor the Transaction objects have those attributes. I will be happy to send a pull request if you point me into the right direction on how to do this.

Ideally, would be nice to have a way to return the converted value, instead of the original one.