update old readme of Debian/Ubuntu .deb package

[synctext]

It allows you to watch videos and download content. Tribler aims to combine the ease of Youtube.com 
with the performance of peer-to-peer.
Tribler is backwards compatible with the Bittorrent download protocol. To discover interesting content 
standard RSS feeds with .torrent links are supported plus the "Tribe protocol" which automatically scans 
the network for available Bittorrent swarms upon startup. Tribler uses an embedded web browser to 
access video clips of Youtube.com and Liveleak.com. Other features are "People who like this also like" 
for recommending related swarms, the ability to make friends, and to donate idle upload capacity to 
friends. The later can improve download speed by a factor of two on asymmetric Internet links. The 
fastest way of social file sharing.