Demos

As the widget audit progresses to a usable state, the demos will need
rewriting.  I also think they need improving.

I'm going to write a better widget demo, something that shows off a little
more the flexibility of the widgets.  It will not have the spreadsheet
part, which I believe would be an entirely separate demo should somebody
wish to pursue it.

The chess demo could do with a minor rewrite.  Basically, it would be good
to offer some kind of basic chatroom and challenge mode, so you could play
somebody else or play a computer AI.

We could also develop a couple of other basic 2 player games to use that
kind of functionality.  Like some kinda pong game. :)

The mail client needs a rewrite from the ground up.  It's at the end of my
to-do list, but that's a long list unfortunately.

- Charlie