Doug Kutzli in A Christmas CarolOn Saturday evening, I was reminded of the local treasure that is the District Theatre's A Christmas Carol. Written by Tristan Layne Tapscott with music by Danny White, this holiday musical is something special: a locally created piece so good that it could, and should, be staged by theatres throughout the country. And this year - the second the theatre has produced the show - brings some notable changes from last winter's staging of this theatrical gem.