Created
December 30, 2011; Revised 1-7-2012; 1-10-2012; 1-11-2012; 1-18-2012;
1-19-2012; 1-27-2012; 2-9-2012; 2-21-2012; 2-28-2012; 3-4-2012;
3-8-2012; 3-9-2012; 3-10-2012; 3-15-2012; 5-29-2012; 8-17-2012;
9-7-2012; 1-2-2013; 1-3-2013; 1-26-2013; 4-10-2013