Currency name

[multiwebinc]

I think it would be good to add a function to get the currency name as well as the symbol.

Maybe add a getNameFromCurrency function that would return the name based on the currency code, and another one (e.g. getCurrency) that would get both the symbol and the name (e.g. {symbol: '$', name: 'US Dollar'}).

I would be willing to create a PR if you like the idea.