add addtional check for kline chart data

Ad support for downloading CA via proxy

remove path in contrcutor

Fix miniTicker endpoint

fix history() fromId, defaults to all

Update README.md

Add to withdrawHistory and depositHistory, new withdrawFee function

Support optional parameters for depositHistory and withdrawHistory
withdrawFee contributed by eugypalu
withdrawHistory suggested by dormadekhin-denis

harden use server time to check for index

Signed-off-by: dmzoneill <[email protected]>

fix typo

this closes ccxt#109