This class can be used to convert money amounts between 210 currencies.
It uses the Web services of XE and OANDA to convert given amounts between 210 types of currency. If one of the Web services is not available, the class tries the other.
The class can return the list of the supported currencies by each of these Web services.
The conversion process takes as parameters the amount to be converted and the origin and target currency identifiers. The converted value is stored in a class variable.
