add teacher view and fix some bugs
Merge branch 'master' of https://github.com/zenozeng/jw
merge
Merge branch 'master' of https://github.com/zenozeng/jw
overload get method
Merge branch 'master' of https://github.com/zenozeng/jw
Merge branch 'master' of https://github.com/zenozeng/jw
fixed bug in views