Music Additions...

Hey, I wrote 2 songs, one that is currently used as the opening theme as
well as the theme to Level 3, the Haunted Forest, and the song for Level
2, the Swamp.  I have improved where the songs stop, start, have
implemented the Pause of the music... I will still add more music, and
will create the functionality to mute the music - I have added the
functionality to the AudioHandler class, but it is not yet implemented.