add shell for fix exam awrad
Merge branch 'master' of github.com:fegeeks/easycms

* 'master' of github.com:fegeeks/easycms: (54 commits)
  update volume and exam total score when input changes
  fix student list order when record score
  fix student active state toggle
  bugfix: remove unproper menu comment
  update widget component cache key
  improve: add chache logic for page widgets
  lots of minor bugfixes
  lots of minor bugfixes
  bugfix: page scanner omit sys page controller
  bugfix: fix widget component loading issue
  bugfix: ignore system pages controller
  bugfix after moving to plugin
  reset i18n file and component helper reference
  revert system pages controller
  move pages, widgets to cms plugin
  basic widget render logic
  basic widget render logic
  basic widget component and helper
  region and widget relation management feature
  update page index page
  ...