[Seaside] Render loop... not looping

[Julian Fitzell]

It's just using the exception mechanism to obtain dynamic variable 
scope...  the value can be provided from anywhere up the call chain.

Julian

Esteban A. Maringolo wrote:
> The curiosity I have is why WACurrentSession is an Exception! It seems 
> to be pretty useful, considering the flow of continuations, but I would 
> like to hear (read) the explanation from the author.