Basic audio player and primative generation

Created the functionality for a basic audio player.

Any audio files in the "Music" folder will be loaded into the game, the first one will begin to play. Once the song has ended, the next one will play. Whenever a song begins to play, a 3d cube primative (acting as the level floor) will be generated with a length equal to the length of the song. When the next song begins to play, the old floor is deleted and replaced with a new one.