Log Message:
Update the "libtorrent" package to version 0.10.3 and the \ 
"rtorrent"
package to version 0.6.3. Change since version 0.10.2 respectively 0.6.2:
- Didn't properly clean up when a torrent with the same info hash was
  rejected. This caused random crashes and memory leaks.
- Properly cancel pieces that are skipped when downloading.