Narrowed down the return type of most EntityEvent subclasses for convenience. Addresses BUKKIT-809

src/main/java/org/bukkit/event/entity/ProjectileHitEvent.java

@@ -13,6 +13,11 @@ public class ProjectileHitEvent extends EntityEvent {
         super(projectile);
     }
 
+    @Override
+    public Projectile getEntity() {
+        return (Projectile) entity;
+    }
+
     @Override
     public HandlerList getHandlers() {
         return handlers;