Remove non-existing cobinhood test urls

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another fix for the fix in bleutrade/bittrex parseTicker for empty ti…

…mestamps "" ccxt#2242

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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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