Issue #1217012 by jyve, aspilicious, brianV, jvc26: Clean up CSS for the Node module

core/modules/node/node.admin.css

core/modules/node/node.css

core/modules/node/node.info

core/modules/node/node.module

core/modules/node/node.pages.inc

core/modules/node/node.tpl.php

core/modules/simpletest/tests/common.test

core/modules/simpletest/tests/common_test.module

core/modules/system/system.theme.css

core/themes/bartik/css/style.css

core/themes/bartik/template.php

core/themes/bartik/templates/node.tpl.php