Merge pull request #1 from JosephPeng/master

merge the main branch to cls branch
re-config the english title page.
re-config the degree part

re-config the degree part to suit the different requires.
Merge pull request #3 from JosephPeng/master

re-config the english title page.
define and declear the sub-teacher
support sub-teacher

add command 'subteacher' and 'subteacherdegree'
Merge pull request #137 from JosephPeng/cls

Support two teachers and more accurate degree name
Merge pull request #4 from JosephPeng/cls

Cls
修正“申请学位级别”，将其改为用户输入而非根据option来选择，因在“北航研究生毕业论文规范”中，此项有不同的适应范围；
增加“总结”一章；
增加“副导师”的相关sample
修正正文中的表格间距
其他一些小细节
Merge pull request #138 from JosephPeng/master

adjust the applydegree and other details