changed Vector2D to Vector2f insted and added sound but the sound is not finnishd yet.

and added a update method to entity for ex the sound entity to update its position in the 
world. Added loging support to whit MultiPrintStream.java

src/ei/engine/sound/Sound.java

@@ -0,0 +1,53 @@
+package ei.engine.sound;
+
+import java.io.IOException;
+
+import org.lwjgl.openal.AL10;
+
+import ei.engine.scene.Entity;
+import ei.engine.util.MultiPrintStream;
+
+/**
+ * A sound that can be played through OpenAL
+ * 
+ * @author Kevin Glass
+ */
+public class Sound extends Entity{
+	/** The buffer containing the sound */
+	private int buffer;
+	
+	/**
+	 * Create a new sound
+	 * 
+	 * @param name The name of the sound
+	 * @param ref the path to the sound file
+	 */
+	public Sound(String name, String ref) {
+		super(name);
+		try {
+			this.buffer = SoundLoader.getInstnace().loadSound(ref);
+		} catch (IOException e) {
+			MultiPrintStream.out.println("Unable to load sound: "+ref+" - "+e.getMessage());
+			e.printStackTrace();
+		}
+	}
+	
+	/**
+	 * Play this sound as a sound effect
+	 * 
+	 * @param pitch The pitch of the play back
+	 * @param gain The gain of the play back
+	 */
+	public void play(float pitch, float gain) {
+		SoundLoader.getInstnace().playSound(buffer, pitch, gain, getLocation());
+	}
+
+	public void update() {
+		//AL10.alSource(source.get(0), AL10.AL_POSITION, sourcePos);
+	}	
+	
+	/** 
+	 * unimplamented method
+	 */
+	public void render() {}
+}