Added additional spec files and README modifications.

Two additional spec files have been added, these are the unstable
releases for libtorrent and rtorrent. The rtorrent version 0.9.3
contains important bug fixes, and it's dependant on libtorrent
version 0.13.3.

Made some minor modificatiosn to the README file.
Merge pull request #1 from raatiniemi/master

Added rTorrent and libTorrent versions