added bter keys
added bter keys

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