Urlresolve

Hi fellows.
I got inspired by infidel and decided to make UMS work with scripters like PMSEncoders,Jumpy,Channels in a smarter way. 
This branch contains a new interfce "URLResolve" which is used to resolve a url like
"http://www.youtube.com/watch?v=cBlRbrB_Gnc" and then do whatever magic it can to produce the real URL (much like channel does). The result beeing you can add that url to your web.conf! Or the PMSEncoder script engine can be reused from wUM
I added this to test it in Channels so try it for yourself.