Add getWidth + getHeight for Entity

src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java

@@ -235,6 +235,16 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         entity.velocityChanged = true;
     }
 
+    @Override
+    public double getHeight() {
+        return getHandle().length;
+    }
+
+    @Override
+    public double getWidth() {
+        return getHandle().width;
+    }
+
     public boolean isOnGround() {
         if (entity instanceof EntityArrow) {
             return ((EntityArrow) entity).inGround;