Fix delete avatar
Merge pull request #423 from liuchuangww/user

Fix delete avatar
Completed post comments list page
Merge pull request #424 from linzongshu/user

Completed post comments list page and added two batch operation action in back-end
Merge pull request #425 from sexnothing/user

User log page and user old code clean up
Unified user model
Completed comment edit, reply and detail page
Moved role management to user module from system module
Refactored mail config
Merge pull request #427 from liuchuangww/user

Refactored mail config
Code cleaning up
Merge branch 'user' of https://github.com/pi-engine/pi into user
Text message fixes
Merge pull request #426 from linzongshu/user

Completed comment edit, reply and detail page
Restored role edit in system module
Update README.md
Add timeline service resmote
Merge pull request #428 from liuchuangww/user

Add timeline service resmote
Completed front-end of my comment page
Fix for translations