Merge pull request #1029 from linzongshu/develop

Fixed bug of password finding
Added releasenote of 2.4.0
Merge pull request #1030 from pi-engine/develop

Added releasenote of 2.4.0
Merge pull request #1032 from linzongshu/develop

Fixed bug of article navigation
Merge pull request #1031 from pi-engine/master

Merge pull request #1030 from pi-engine/develop
Added mbstring detection upon tag split
Pi 2.5.0 branch kick-off
Added default value for markup renderer
Added encoding API for string service
Added APIs to string service for StringUtils
Code cleaning for user profile navigation
Suppress notice messages
Code cleaning for setup
Code cleaning for setup
Code cleaning for setup