In-game music stops if all tracks are exhausted

[ChrisNeedham24]

There should be some built-in VLC repeat or something that fixes this.

[ChrisNeedham24]

This is more difficult than first assumed, the built in loop/repeat doesn't seem to work for the class used.

[ChrisNeedham24]

Acceptance Criteria:

• Menu music loops.
• In-game music restarts once all eight tracks have played.

The changes for this will need to be made in music_player.py, and will require some knowledge of the python-vlc library.