Merge pull request #350 from sexnothing/user

Perm config in system module
Refactor and fix some bug
Merge pull request #351 from liuchuangww/user

Refactor and fix some bug
Grant super permission to admin
Merge branch 'user' of https://github.com/pi-engine/pi into user
Fix for permission batch operation
Restored staff user/role
Fix user list
Merge pull request #352 from liuchuangww/user

Fix user list
Bugfix for batch permission assignment
Merge branch 'user' of https://github.com/pi-engine/pi into user
Split sclar value from array value for user data
Code cleaning up
Split sclar value from array value for user data
User index page in user module