重构用户中心的current_user
修改检查登录失败后的redirect地址为logout 以删除用户 cookie
退出时同时删除cookie
Merge branch 'master' of github.com:sufish/wheat-web
添加推荐商户API
Merge branch 'master' of github.com:sufish/wheat-web
compute_distance 添加验证
修改推荐商户API