todo added to the twig.engine drawing attention to a possible place to cast the array into an object

fixed typo with comments message in node.twig in the bartik theme template and passed comments through render function

Attempt to merge in D8 core while preserving /core/lib/Drupal/Core/Template and /core/themes/engines/twig and .twig files in stark and bartik

Initial commit of node.twig. Still several TODO's commented but it's atleast in a state thats it's not throwing errors.