Implemented a way to play ISound(s) to players without using a sound ID.

java/noppes/npcs/api/AbstractNpcAPI.java

@@ -238,6 +238,8 @@ public abstract class AbstractNpcAPI {
 
     public abstract void playSound(int id, ISound sound);
 
+    public abstract void playSound(ISound sound);
+
     public abstract void stopSound(int id);
 
     public abstract void pauseSounds();