添加考试页面还有评定分数逻辑（没有页面样式）
证书完善
Merge branch 'master' of https://github.com/HCI-webdesigner/Dean into KeithChen
冲突的一些commit
Merge branch 'master' of https://github.com/HCI-webdesigner/Dean into KeithChen

Conflicts:
	app/controllers/Examinations.java
Merge branch 'master' of https://github.com/HCI-webdesigner/Dean into KeithChen

Conflicts:
	app/controllers/Examinations.java
Merge branch 'KeithChen' of https://github.com/HCI-webdesigner/Dean into dev

merge with KeithChen
Merge branch 'exam' of https://github.com/HCI-webdesigner/Dean into dev
fix
Conflicts:
	app/controllers/Examinations.java
	app/models/Curriculum.java
	app/views/Examinations/correctingPaper.html
fix again
添加课程评论功能