v1.01: Nation selection and main menu improvements

- Choose your nation at first launch. You now pick the nation you will play when you first start the game. You can change it at any time from NATION in the main menu.
- Your nation carries over between launches. The game starts with your last nation, so there is no need to choose again.
- Main menu cards match your nation. The OFFLINE, ONLINE and PRACTICE cards now show the fighters of your selected nation.
- Some Japanese voice lines corrected.