add currency formatting API
add currency formatting API

samuraisam/breadwallet,voisine/breadwallet,litecoin-association/LoafWallet,QuantumExplorer/breadwallet,voisine/breadwallet,samuraisam/breadwallet,voisine/breadwallet,QuantumExplorer/breadwallet,breadwallet/breadwallet,samuraisam/breadwallet,voisine/breadwallet,voisine/breadwallet,thrasher-/breadwallet,breadwallet/breadwallet,thrasher-/breadwallet,litecoin-association/LoafWallet,QuantumExplorer/breadwallet,litecoin-association/LoafWallet,QuantumExplorer/breadwallet,breadwallet/breadwallet,litecoin-association/LoafWallet