Transporrent begins

So at this point Transporrent is a concept -- to make 'normal' http file downloads take advantage of the benefits of BitTorrent, without user intervention. It turns out the implementation is quite simple. The 'tough' part is the chicken-and-egg problem, because both client and server need to enable Transporrent. Check out the Transporrent overview doc, and the soon-to-be uploaded prototype.