Nutriscore algorithm implementated in java

Use example:

	`final Product product = new Product.ProductBuilder()
			.energy(1121f)
			.fat(3f)
			.saturatedFat(0.5f)
			.sugar(0.5f)
			.fiber(3f)
			.proteins(9f)
			.sodium(0.315f)
			.salt(0.8f)
			.build();
	
	final String result = Nutriscore.getNutriscore(product, FoodType.GENERAL);`