Many improvements by dmzoneill

Many improvements and bug fixes.
16 commits by dmzoneill 🏆

Merge pull request binance-exchange#47 from jaggedsoft/master

Merge from development

Fix miniTicker + 7 commits by dmzoneill

20 commits by dmzoneill 🏆

withdrawHistory, depositHistory, withdrawFee

dmzoneill fixed kline + several other improvements 🏆

More constructor options

Add WebSocket kline function + miniTicker example

multiple constructor support & specify file in constructor (by dmzone…

…ill)

You can now pass a json filename to the constructor to load your API keys and settings from there

Many improvements by dmzoneill, including PHP 5.6 support. Thank you!!