修复手动模式密钥不正确时依然可以进行下一步的BUG
修改赞助地址到官网域名下
增加备用镜像服务器地址
优化错误代码-4的提示友好性（增加详细错误信息和解决方案）
增加检查更新功能
增加多语言支持（现已支持简体中文和英文）
增加根据语言环境自动调节本地化字体（需要在本地化文件里增加字体名称）
优化启动速度
界面代码和相关流程代码重构
Google Translate :
Fix issue.(You can still proceed to the next step when key is Incorrect in manual mode.)
Modify the sponsored address to the official website.
Increase the alternate mirror server address.
Optimize the error tips of error code-4 to more friendly (add detailed error information and solutions)
Added Module of check updates.
Added multi-language support.
(Simplified Chinese and English are now supported)
Increase the automatic adjustment of localized fonts according to the locale (requires adding font names to localized files)
Optimize startup speed.
UI code and related process code refactoring.
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