14.0.0

Added a GroupBy method on the IQueryBuilder and ISelectBuilder interfaces along with a simple implementation internally.
This is a "user be aware" method, as it is easy to create an invalid group by query in SQL.

Example usage:

CreateQueryBuilder<object>("Orders")
    .GroupBy("OrderId")
    .Column("OrderId")
    .CalculatedColumn("COUNT (*)", "ItemCount")
    .CalculatedColumn("COUNT (DISTINCT ItemCode)", "ItemCodes")
    .ToList();