Merge pull request #54 from FeverTeam/dev-cold

Dev cold
Merge pull request #55 from FeverTeam/dev

Dev
增加意见反馈/additon/feedback接口的实现及文档。
Merge pull request #57 from FeverTeam/dev-iron

Dev iron
Merge pull request #59 from FeverTeam/dev

增加意见反馈/additon/feedback接口的实现及文档。