added assertions for bidask checking, removed excessive logging (no need, because we got nice exception printer)
added assertions for bidask checking, removed excessive logging (no need, because we got nice exception printer)

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