a major refactoring

I've reworked text client to use the new PortalInterface. It is now ready to be used remotely, perhaps with an RMI portal. :-)

Lots of updates. Interactive text works, scripts are untested and the Swing interface is broken at this point.

I don't like the way I've reworked scripts. I want to do it right, and that now means having scripts run from an evaluator--where the evaluator is the UI. This will be a big step towards having DescriptorSections for scripts. Meanwhile, Swing is on hold.

Bill