BCX Project Update 024

Hello all BCXers! This is project update 024. The multi-language road map has been updated on our brand new website. Feel free to check! And we will give a further explanation of the corresponding changes in the road map later.

[Core/dev] Have optimize the Qt code to avoid security risks

[Core/dev] Have optimize the test framework and modify the log character set to UTF-8.

[Core/dev] Have optimize the WalletFrame and remove walletView in removeWallet.

[Core/dev] Compare the advantages and disadvantages of Casper and DCR mixed mining.

[Test] Perfect UI testing framework