singleChoice增改查功能的完成，尚未完善科目切换

Signed-off-by: yeerin <837017745@qq.com>
Signed-off-by: yeerin <837017745@qq.com>
Signed-off-by: yeerin <837017745@qq.com>
Merge remote-tracking branch 'origin/master'

Conflicts:
	ExamHelper/WebRoot/WEB-INF/classes/.gitignore