more cleaning up...

Coupla questions here. 1) It doesn't look right to me to be throwing construct exceptions when someone gets the argument list wrong. There's already an error mechanism in place for that, and it's not really 'exceptional'. We should be using them only when the actual object creation fails IMHO. Any objections to my taking those out, where they exist? (NB they're not consistent either.) 2) We still have the gtk and gdk overrides from PHP-GTK 1 in the source. Are these still useful to anyone or can we lose them now? 3) Same goes for bits and pieces of out-commented PHP-GTK 1 code in /main - useful, or 'can go'? 4) We need to come to some agreement over what should happen to the demo and test dirs. - Steph