sshibani/View model using extended attribute

## View model using extended attribute
[ContentModel("product", true)]
public class Product : ViewModelBase
{
    [TextField]
    public string Title { get; set; }

    [ProductPrice(FieldName = "productId")]
    public double Price { get; set; }
}
	[ContentModel("product", true)]
	public class Product : ViewModelBase
	{
	[TextField]
	public string Title { get; set; }

	[ProductPrice(FieldName = "productId")]
	public double Price { get; set; }
	}