* src/glade-editor.[ch]:
	  o Revert changes "free all GladeEditorTable"
	    from Juans last patch; editor tables are *not to be freed*,
	    instead they are instantiated once per class and juggled
	    throughout the application (my bad for not noticing this in
	    advance).
	  o Catch GladeProjects "close" signal and clear the editor.

	* src/glade-gtk.c: Shut up a compiler warning

	* src/glade-project-view.[ch]: Catch GladeProjects "close" signal and
	  detatch the GladeProjectView.

	* src/glade-editor-property.[ch]: Catch GladeProjects "close"
	  signal and drop the loaded GladeProperty.

	* src/glade-app.c: in glade_app_remove_project(), now simply
	  g_object_unref() the removed project and let the universe
	  adjust itself.