am 498d710a: modify sample template and add new css/script for new numbered code...

am 498d710a: modify sample template and add new css/script for new numbered code. The line numbers are included inside the <pre> block initially, but hidden, so this script moves the numbers to a separate block on the left and makes them non-selectable. Also includes

* commit '498d710a4f66ec8b6fff4c965235f226b56cd2dd':
  modify sample template and add new css/script for new numbered code. The line numbers are included inside the <pre> block initially, but hidden, so this script moves the numbers to a separate block on the left and makes them non-selectable. Also includes script for features like single-click to highlight a line of code and double-click to invoke the link for that line.