增加导航栏
导航栏+学生评分管理完成
Merge remote-tracking branch 'origin/LF' into LF

Conflicts:
	ScoreByStudent_Management.html
	js/ScoreByStudent_Management/ScoreByStudent_Management.js
Merge branch 'LF' into WLB

Conflicts:
	ScoreByStudent_Management.html
version 0.1
Merge branch 'master' into WLB
1、增加选择课程时的课程搜索
2、增加去除最高分和最低分的功能