RomOnlyComputer now has a GUI

cli/src/bin/rom_only.rs

@@ -44,4 +44,4 @@ fn main() {
     println!("COMPUTER: Read {:02x} from ROM", rom_only.data_bus()) ;
     println!("COMPUTER: Read {:04x} from Address Bus", rom_only.address_bus());
     println!("----");
-}
+}