Merge pull request #504 from liuchuangww/user

Add find password for uclient
Added support for custom templates in usr/<module>/template/<template.file>
Moved custom widgets to module custom path
Merge branch 'user' of https://github.com/pi-engine/pi into user
Added placeholder files
Separate mget from get in user APIs
Fix for widget block template
Added user custom fields import
File cleaning up
Added permission for profile import
Formulated field registry type for access
Completed uclient find password