bl3p unified fetchTrades return + minor fixes
bl3p unified fetchTrades return + minor fixes

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