Started implementation of authenticated API support for Poloniex exchange.
Started implementation of authenticated API support for Poloniex exchange.

thrasher-/gocryptotrader,jmaurice/gocryptotrader,snipesjr/gocryptotrader,thrasher-/gocryptotrader,thrasher-/gocryptotrader,thrasher-/gocryptotrader,thrasher-/gocryptotrader,snipesjr/gocryptotrader,snipesjr/gocryptotrader,snipesjr/gocryptotrader