[Feature Request]Add "Last Active" date/time for each torrent feature

[Corin-EU]

Would it be possible to add a date/time "Last Active" feature to libtorrent/rtorrent which shows the date/time that the torrent downloading or seeding was last active.

Transmission/transmissiongui has this feature which is extremely useful for determining whether or not a torrent is "stuck" downloading (ie never likely to complete) or not in demand for being seeded, and thus should be removed.