GGU-CAD: File menu

• GGU-CAD: "New" menu item
• GGU-CAD: "Load" menu item
• GGU-CAD: "Save" menu item
• GGU-CAD: "Save as" menu item
• GGU-CAD: "Load individual layers" menu item
• GGU-CAD: "Save individual layers" menu item
• GGU-CAD: "Import" menu item
• GGU-CAD: DXF import
• GGU-CAD: HPGL import
• GGU-CAD: ASCII import
• GGU-CAD: "Export" menu item
• GGU-CAD: "Statistics" menu item
• GGU-CAD: "Output preferences" menu item
• GGU-CAD: Print and export
• GGU-CAD: "Batch print" menu item
• GGU-CAD: "Exit" menu item
• GGU-CAD: "1, 2, 3, ..." menu items