Major Changes -> new sounds .wav and new event and sound classes

-added GameSounds.java, GameEvents.java
-added enum EventType.java, SoundType.java
-added folders for music and sounds
-notice: GameEvents.java is incomplete. You will need GameEvents.java
for the sounds and to display text messages to the screen (such as "GAME
OVER"). Do NOT use the GameSounds class in the code unless it is for
GameEvents.java or you just want to test the sounds for a specific game
event.