Completed comment edit, reply and detail page
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