Music Player

I've included 7 optional fixes in the music player archives related to music and SFX volume on certain maps or silence issues that can arise if music player is used. These fix are in the "optional fixes" folder. They fix small things that music player cannot overcome alone, but not applying them does not make the player less functional. These things should not be seen as music player bugfixes but more overcoming of certain limitations.

Please read the separate readme in the "optional fixes" folder for all details about those 7 cases or scenarios.

Thanks to Gi Nattak for his help on music event code.