若干修改
1、redis连接改为每次重新连接，避免连接超时
2、忽略编译警告，防止警告被判为编译错误
更新版本参数
Merge branch 'release/v0.2.1'
Merge tag 'v0.2.1' into develop

v0.2.1
Merge pull request #3 from NJUST-FishTeam/develop

Develop