a bit more refactoring

I've now pushed events deeper into the API to facilitate the implementation of forms(under svn). I've also written a draft version of Forms (also under svn). I'm now working on the conversion of NPJS to use forms. But there's a lot of work left on the client sides.

I expect the interactive text client to go quickly. As for the Swing client, I'm thinking about having composable forms using a vertical box layout. That would make things pretty open ended, mm? But making it look reasonably good might be difficult.

Bill