By Chuck MacDonald             When you have an American classic, you had better take good care of it. If that classic is the Baltimore Annapolis Trail, a paved route that stretches 13 miles across Anne Arundel County, one should look after it like it was a classic car, a historic home, or a famous painting. The B& A Trail has been named to the Trails Hall of Fame by the national bicycling organization Rails to Trails Conservancy. Each year approximately 1.5 million people use the trail for walking, biking, jogging, or roller blading.             The Friends of Anne Arundel County Trails is …