* src/bonobo-io.c (hack_xmlSAXParseFile): Re-enable

* src/main-component.c: No longer a dummy. Remove DUMMY compile
flag.
(load_workbook_from_stream): Remove.
(dummy_add_interfaces): Rename to add_interfaces. Pass control to
bonobo_persist_stream_new.
(gnumeric_component_factory): Make a real gnumeric component.

* src/sheet-control-gui.c (scg_take_focus): Test if wbcg_toplevel
!= NULL.

* src/workbook-control-priv.h: Virtualize menu_state.sheet_count.

* src/workbook-control-component.c (wbcc_get_password,
wbcc_progress_set, wbcc_progress_message_set, wbcc_init_state,
wbcc_title_set, wbcc_format_feedback, wbcc_zoom_feedback,
wbcc_edit_line_set, wbcc_edit_selection_descr_set,
wbcc_auto_expr_value, wbcc_undo_redo_clear,
wbcc_undo_redo_truncate, wbcc_undo_redo_pop, wbcc_undo_redo_push,
wbcc_undo_redo_labels, wbcc_menu_state_update,
wbcc_menu_state_sheet_prefs, wbcc_menu_state_sheet_count,
wbcc_menu_state_sensitivity, wbcc_validation_msg): New no-op
methods.
(wbcc_error_system, wbcc_error_plugin, wbcc_error_read,
wbcc_error_save, wbcc_error_invalid, wbcc_error_error_info,
wbcc_control_new, wbcc_sheet_focus, wbcc_claim_selection): New
methods.
(workbook_control_component_init): New function.
(workbook_control_component_ctor_class): Flesh out.
(workbook_control_component_new): New function.

* src/workbook-control-gui.c (wbcg_cur_scg, wbcg_sheet_remove,
wbcg_sheet_rename, wbcg_sheet_focus, wbcg_sheet_move, cb_edit_cut,
cb_sheet_remove): Use new name of from sheet_to_page_index and
make public.
(wbcg_sheet_add): Use virtualized menu_sheet_count.
(workbook_control_gui_ctor_class): Virtualize menu_sheet_count.