Update v0.1.8

Here's a new update.

- Now you can customize the students.

- Map texture can be motified now.

- Add the settings feature and you can modify the game configuration.

- Add some transition states to characters.

- Vore events are prominently marked in the lower right corner.

- Increase character relationships, but they are still not complete yet.

- Bug fix.

- Some other updates that I forgot.

Control mode may come in the next big update, but I need to put this project down for a while before that, not for long, please be patient.

If you find any bugs or have any suggestions or feel confused about some content of the game, please tell me.