Library mechanism changed

[mah454]

Hello
Please note to my last commit (Not merged yet) :
My repository
Merge request

Library mechanism changed .

1. new binance api configuration mechanism .
2. new factory classes .
3. new api .
4. support binance Spot, Futures, Margin, Testnet .
5. so many improvements .
6. bug fixes
7. new examples , and fixed some old examples .
8. others .....

someone call to joaopsilva .
I think need to see new codes .