Recommendation
Merge branch 'master' of github.com:CloudEDU/CloudEDUServer
Merge branch 'master' of github.com:CloudEDU/CloudEDUServer
增加双击显示推荐课程
Merge branch 'master' of github.com:CloudEDU/CloudEDUServer
recommendation 完成 缺少后台的 removeRecommendation