added examples/py/bitmex-fetch-ohlcv-with-extra-params.py

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a little more readable cloudscraper error messaging in cli.js

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added more notes on custom params to the Manual here and there ccxt#2254



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minor edits

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ccex fetchMarkets → pairs.json fix ccxt#2246

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1.11.86

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1.11.85

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bleautrade missing ticker date fix ccxt#2242

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coinegg TypeError: Unicode-objects must be encoded before hashing fix c…

…cxt#2239

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added one more link to "see also" in examples/README.md

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