Implement accessible support, fixes #454653.

Implement accessible support, fixes #454653.

2008-01-25  Johan Dahlin  <johan@gnome.org>

        * gtk/gtkwidget.c: (gtk_widget_buildable_interface_init),
        (gtk_widget_buildable_get_internal_child), (free_action),
        (free_relation), (gtk_widget_buildable_parser_finished),
        (accessibility_start_element),
        (gtk_widget_buildable_custom_tag_start),
        (gtk_widget_buildable_custom_finished):
        Implement accessible support, fixes #454653.

        * gtk/gtk-builder-convert:
        Add support for migrating old glade files

        * tests/buildertest.c: (test_widget), (test_file):
        Add accessible tests and improve the test_file function to display
        toplevels and run dialogs.

svn path=/trunk/; revision=19403