Some of the docs about graphics are out of date since the move to QT,
and the gdxxx verbs broke (at least for me) in the upgrade to j803/QT5.

So: I spent some time today putting together a little demo that shows how
to use isigraph to draw to the screen and handle raw keyboard events:

  https://github.com/tangentstorm/tangentlabs/blob/master/j/gltest0.ijs

It doesn't do anything interesting visually. I just thought someone
else might find it useful and/or teach me the error of my ways. :)

I also used it to render a bitmapped font I made back in the DOS days:

  http://i.imgur.com/fo4XcqF.png
  https://github.com/tangentstorm/tangentlabs/blob/master/j/dosfont.ijs

I've implemented a bitmapped text display like this in 4 other languages
over the years, and none of them have ever made the job this easy. :)

-Michal
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