Modify queue script to handle oversized torrents

[chros73]

Currently if an oversized torrent (there's not enough freeable rotating space for it) gets into the queue then queue manager deletes (if it's enable) everything from rotating and unsafe directories, but since still not enough space for the queue, torrents are not moved from the queue directory.

Modify queue script to handle oversized torrents:

• create a directory called .oversized inside .rtorrent dir
• move oversized meta file from .queue dirs into .oversized directory (so normal behavior of queue manager would go on) and append current time to the moved meta filename

Update corresponding wiki pages.