Merge pull request #617 from liuchuangww/user

User
Fix for module custom class load
Merge branch 'user' of https://github.com/pi-engine/pi into user
Load translations for comment
Update translate file
User admin list page with delete action
User basic profile edit message update
User profile and homepage update
Merge pull request #618 from sexnothing/user

User admin list page with delete action
Added js callback for userbar. The solution is kinda ugly, however it works anyway.
Changed user avatar naming strategy
Update translate file
Fix user email template