Hook up examination to course class.
rewrite permission model (behavier by QianFan)
Merge Jasli2 master
Merge pull request #26 from pigmike/master

Rewrite Permission Module
Update exam feedback view style. TODO: need to refactor the feedback process.
Merge branch 'master' of https://github.com/jasli2/evolution
Merge branch 'master' of https://github.com/jasli2/evolution
fix result view show error