Release

1. Fix synchronization errors

3.3.5 release

1. Dedicated token page.
   1.1 show balance of selected address
   1.2 only support transfer operation for token

3.3.4 release

Support transfer URC20 token with multi-sig address.

3.3.3 release

Support ubtc fork at 572000.

3.3.1

fixed some bugs

3.2.8

Support smart contract
Support hard fork at 551111

3.2.1

Support UBTC smart contract and POS computation.

3.1.2

Fix "decode fail" issue.

3.1.1

Support new UBTC after the 506400 fork.

3.0.9

Update block explorer URL.