Merge install_module module to module module.
Remove install_module page.
Password policy changed.
Merge branch 'develop' of https://github.com/renfeisong/buaasoft-wechat into develop
Fixed typo.
Now logged in user will be auto-redirected to admin/index.php from login or register page.
Update homework and ranking module
Add feedback module
Add settings page for feedback module
Various changes addressed
Stop capturing logout events
Added pages that everyone can access
Various changes addressed
Change session period from 20 mins to 60 mins
Fixed a security issue that user may change other's password
Several minor UX boosts
Add notes support for admin users
Add contact table and corresponding functions.
Bug fix.
Bug fix.
Add pinyin for contacts
Allow add homework per-class
Add tabs to homework mgmt. panel
Contact table now can be edited.