Avatar ok
Changed parameter name
Merge branch 'user' of https://github.com/pi-engine/pi into user
Avatar done
Refactored APIs for user role
Refactored APIs for user role
Merge pull request #398 from sexnothing/user

Avatar done
Improved denial page message
Completed edit user by admin
Merge pull request #399 from liuchuangww/user

Completed edit user by admin
Avatar refactoring
Fix for avatar
Merge branch 'user' of https://github.com/pi-engine/pi into user
Typo fix
Fix for avatar
Fix for privacy
Merge pull request #400 from liuchuangww/user

Fix for privacy
Hide not used avatar sources
Merge branch 'user' of https://github.com/pi-engine/pi into user
Code cleaning up