Log Message:
Update "libtorrent" package to version 0.11.8 and "rtorrent" \ 
package
to version 0.7.8. Changes since version 0.11.7/0.7.7:
- Several new commands for use with XMLRPC. See the SVN log for a
  complete list.
- Fixed the wrong tracker requests being sent when finishing a torrent.
- Added Peer Exchange support, enable with the "peer_exchange=yes"
  option.
- Don't skip the last line in rc files missing the final newline.
- The torrent is no longer closed on finished for on_finished commands
  as it did last release. Instead d.set_directory causes the download to
  call close_directly to allow moving of finished torrents.
- Added "close_on_ratio".
- Allow commands to be appended to "{stop,close}_on_ratio", so you can
  e.g. erase a torrent that has finished.
- Set "encryption=allow_incoming,prefer_plaintext,enable_retry" by default.