Merge branch 'release/1.0'
Merge branch 'release/1.3'
Merge branch 'release/1.4'
Merge pull request #1 from Yemsheng/develop

添加支付宝sign和verify
Merge pull request #2 from Yemsheng/develop

pub key
实现礼券对换功能
fix
完成微信兑换的测试
Merge branch 'release/1.8'
微信兼容大小写命令
升级版本号
兑换金币时记录真实兑换人的信息
Merge branch 'release/2.0'
支持点乐积分墙
完成点乐积分墙的单元测试
增加文档及发布
erge branch 'release/2.1' into develop