title: How do I use SquishIt with a source that is not a valid virtual path
body: <p>I want to squish a whole bunch of stuff together from various sources around my local network
  When I run the following code I get the error 'http://cdn.mydomain.org/ajax/libs/jquery/1.5.1/jquery.js' is not a valid virtual path ehich is fair enough, because it isn't</p>
  
  <pre><code>@MvcHtmlString.Create(
   SquishIt.Framework.Bundle.JavaScript()
   .Add("http://cdn.mydomain.org/ajax/libs/jquery/1.5.1/jquery.js")
   .Add("~/Scripts/MyTrivialPlugin.js")
   .ForceRelease()
   .Render("~/Scripts/combined_#.js"))
  </code></pre>
  
  <p>Is there an option in SquishIt or any other 'squisher' that will take uri's for arguments?</p>