replace ajax_*mail.php with ajax_mailfunc.php
fix bug: .nocontent has been replaced by .alert-popup
change unread icon
add preferences table
new function: starred mail
change style of unread mail
align checkboxs and their labels
remove some silly effects
compatible with ie7
remove console.log
new function: reset user password
<input> for admin password gets focus automatically
display more infomation in disabled user list
support environment variable in config.ini
update user statistics
“disable open source” option for each problem
sort privilege list
deleting logged user is disallowed
normalize score
prevent typeahead selecting the first item automatically