* src/glade.h, src/glade-catalog.c, src/glade-widget-class.[ch]:
	  catalog book specifications now on widget classes

	* src/glade-editor.c, src/glade-editor-property.c: Now get the
	  book name directly from the widget class.

	* doc/catalogintro.sgml: documented added "book" property.

	* widgets/bonobo.xml.in: added gnome catalog dependancy

	* widgets/gnome.xml.in, widgets/gtk+.xml.in: Added book specifications.