It’s December, so J. Rieger & Co.’s “O! So good!” slogan playfully transforms to “Ho! Ho! Ho! So good!” The distillery’s popular holiday-edition whiskey is on shelves, along with T-shirts, mugs and gift sets for the Christmas season. And it’s time for the company to mark another year of progress in its journey as one of Kansas City’s small business success stories. In some ways, the story began in 2014,…