Virginia Re-Imagined

Due to the frustrations with handling each Reel request manually (and the attendant copy/paste code that goes from project to project) I wanted to find a different way to implement Virginia.  By using Rack we can layer any web framework on top of Reel that is already running in the Adhearsion process.  The README documents how to use this with Sinatra, but it should theoretically be compatbile with any Rack-compatible framework.

Obviously this is backward-incompatible with previous Virginia releases.  Feedback requested.

Ping @benlangfeld, @polysics, @JustinAiken, @wdrexler