minor edit to README.md for #131
minor edit to README.md for #131

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