added fetchTickers to southxchange
added fetchTickers to southxchange

aiueogawa/ccxt,thijstriemstra/ccxt,thijstriemstra/ccxt,tritoanst/ccxt,aiueogawa/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,tritoanst/ccxt,ccxt/ccxt,tritoanst/ccxt,tritoanst/ccxt,ccxt/ccxt,thijstriemstra/ccxt,aiueogawa/ccxt,thijstriemstra/ccxt,aiueogawa/ccxt