Currency types

[nicolaeabacioaiei]

https://github.com/MihutBalasanu/VendingMachine/blob/a81ba569d48e6805a15cc6bc71f6f6d133b31b9f/20181021_VendingMachine/src/Currency.java#L2

Aici as prefera saa fie RON si EUR. Fiindca sunt constante, numele lor trebuie sa fie cu litere mari.