Xion/seejoo — Issue #6: .seen plugin
Author: Xion
Created: 2012-01-07 21:40:47+00:00
State: open

It should work as follows:
```
.seen Leeroy
Leeroy was last seen on 2012-01-7 22:39:17, saying: Bye!
```
So it should record activity of users and answer to .seen command. For simplicity, we may record only messages and not joins/parts/etc.