bitfinex minor formatting edit ccxt#681

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minor formatting edit ccxt#682

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wex: maker/taker fees

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poloniex: deposit

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skipping poloniex on Travis

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added fetchActiveOrder to hitbtc2

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skippping huobicny on Travis

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hitbtc2 uuid refix ccxt#667

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kuna: fetchL3OrderBook

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kuna: fees updated

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