Change default data directory from /GoldCoin (GLD) to /Goldcoin (#37)
Change default data directory from /GoldCoin (GLD) to /Goldcoin (#37)

Change default data dir for Windows and Mac
goldcoin/Goldcoin-GLD,goldcoin/Goldcoin-GLD,goldcoin/Goldcoin-GLD,goldcoin/goldcoin,goldcoin/goldcoin,goldcoin/goldcoin,goldcoin/Goldcoin-GLD,goldcoin/goldcoin,goldcoin/Goldcoin-GLD,goldcoin/Goldcoin-GLD,goldcoin/goldcoin,goldcoin/goldcoin