change commands of brief help
new show presence: unavailable
use locale's date format
better time parser
remove unused files
-old 命令支持 since 查询
remove dependency for greenlet
minor change
translation and setlocale
清理用户退出代码
update quickinstall.sh
path is different now
forgot to run 2to3 on mongokit
fix: datetime is immutable
fix secondsSince
fix last_seen not correct in some case
-old + 显示自上次离线以来的消息
if a message starts with some symbols, don't treat it as a command
fix one day offset in old command caused by mixed localtime and utc
update docs