model rata de schimb valutar
adaugat campuri suplimentare sau redenumit campuri

amount -> amount_in
currency -> currency_in

amount_out, currency_out, rate, pin
model rata de schimb valutar
data exchange
actualizat todo
modificat structura payments si invoices

introdus sau modificat coloane (amount_in/out, currency_in/out, rate,
pin)

modele noi