Merge branch 'master' of https://github.com/jasli2/evolution
Add some  new features for users,  import CSV
Add course new feature , import CSV
Merge branch 'master' of https://github.com/jasli2/evolution
fix user export CSV some bug
fix course export CSV BUG
fix course duration type error
Add exam、question model
Add examination question relation
merge jasli2 master
Fix user edit zh-CN
Fix course new zh-CN
fix menu view zh-CN
fix view action zh-CN
fix search zh-CN
Merge pull request #10 from hutuxiansheng/master

import/export course  users