[Ur] demo isn't working

[Karn Kallio]

> hi all, yesterday i was trying the demo one by one, suddenly the server was
> down and is still unavailable. Is it my network problem or we all
> experience this?
> 
> 
> --
> Best Regards，
> Liu Qiang

It seems to be the server ... the demos show me this:
Service Temporarily Unavailable
The server is temporarily unable to service your request due to maintenance 
downtime or capacity problems. Please try again later. 

The additional demos ( http://www.impredicative.com/ur/more/ ) and the UrFlow 
demo ( http://www.impredicative.com/ur/scdv/ ) are still available though.