获取更新的提交

Change-Id: I879dec76a78f897ce942cac7ed3a525c5eef3ed7
Merge branch 'master' of https://github.com/Hahn-/GdutExchange.git
修复了后台管理的用户，商品，日志模块

Change-Id: I2a77f3ac92b0146ec026ad59ce2d03d76342a869
Merge branch 'master' of https://github.com/Hahn-/GdutExchange.git
清理功能提交

Change-Id: I0bf49964a72048ecc05858b104c2189d68d3330a