Merge pull request #11 from hutuxiansheng/master

fix course duration bug
Some course will not related to competency level. Add paginate for user model.
Merge branch 'master' of https://github.com/jasli2/evolution
fix type which should be current_user.
fix typo.
Fix string error. root cause unknown....
change duration to minitus. display user email address.
Fix display user typo.
prevent nil error for user which do not have position infomation.
fix another position issue.
fix syntax error.
fix some bug.
change the display information for course list.
fix notice view zn-CN