+ * added additional configuration directives to define main menu buttons:
+ - menu.button_name and menu.button_name.active
+ - menu.button_levels and menu.button_levels.active
+ - menu.button_scores and menu.button_scores.active
+ - menu.button_editor and menu.button_editor.active
+ - menu.button_info and menu.button_info.active
+ - menu.button_game and menu.button_game.active
+ - menu.button_setup and menu.button_setup.active
+ - menu.button_quit and menu.button_quit.active
+ * added eight pure decoration graphic definitions for the game panel