minor edits to the InvalidNonce explanation ccxt#1602

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add handling of CancelPending to poloniex

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proper bitflyer signing for empty request body fix ccxt#1597

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Exchange: verbose loggin: now request and response have the same stru…

…cture

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less newlines in the transpiler warning

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Manual: trades/executions: proper nesting

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transpiling the quoted colon in php fix ccxt#1585

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gdax: parseFloat => this.safeFloat

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added CURLOPT_FOLLOWLOCATION for kraken fetchMinOrderSizes fix ccxt#1585



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kraken fetchDepositAddress generating too many new addresses fix ccxt…

…#1586

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