Update declare for Version 4.2.0

1. Update partial UI & function;

2. BUG fixes;

3. Add PUSH control;

4. Optimize APP update notification;

5. Add"share to telegram" function;

6. Withdraw address adds support for multi-chain currencies

7. Add"Copy link" function on share link;

8. Optimize the login interface;

9. Add the currency tags for part tagged currency on the share to deposit QR code;

10. Optimize the function of trade pages;

11. Market page----Long press the trading pair in favorites area to top;

12. Fixed the issue for after hiding to background generated a lot of flux of Andriod App;

13. IOS App---- Add index function in K-line of the market page;

14. The function of the fingerprint password about Andriod App.