* gtk/src/printjob.[ccg|hg]:
* gtk/src/printsettings.[ccg|hg]:
Move class Gtk::PrintSettings::PageRange out of PrintSettings,
making it Gtk::PageRange.
Fix set/get_page_ranges(). The implementations can't be almost identical
in PrintJob and PrintSettings. gtk_print_job_set_page_ranges() takes
ownership of the GtkPageRange array, but gtk_print_settings_set_page_ranges()
does not. gtk_print_job_get_page_ranges() does not give the caller a newly
created GtkPageRange array, but gtk_print_settings_get_page_ranges() does.