Description: a currency converter.
Features:
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Simultaneously update the target currency among while typing
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Add interested countries to the watch list
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Extensible (can add custom currency, inspired by Chris Eidhof).
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Encapsulate currency converting process in the CurrencyConverter Class which can be used as: converter = CurrencyConverter(updateTimeInterval:2, exchangeRateUpdatedHandler: exchangeRateUpdatedHandler)
