Adding getLink() to ICallback

[Geoff Callender]

I'd like to see a getLink() method added to ICallback so we can do  
redirect-after-post with the callback.

        public ILink getLink(IRequestCycle cycle);
The reason is that I like to keep a "callback stack" as I descend  
into the pages.  A page can pop its calling page off the stack and  
often I'd like to redirect to it rather than just activate it.

Any comments?