Added "moaning" noises to a few of the zombies so that every once in a while, they will moan. The volume of the sound is dependent on the individual zombie's distance to the player. Also made a few changes to the Sounds class to correct issues where the game was freezing when some sounds tried to reset or play. Reduced speed of Rotdog because he was making it damn near impossible to survive longer than 5 rounds... or maybe I just suck at my own game.