Includes CSS cleanup and markup improvements to both video and image templates, moving the media HTML piece out of the `header` element.
Props obenland, closes#23620.
git-svn-id: http://core.svn.wordpress.org/trunk@23839 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Extract first video or image from Video and Image post format posts, and place the item above the title within its own HTML wrapper with `the_video()` and `the_image()'. Also, remove the item from the post content with `the_extra_content()`.
This allows us to meet the design requirements for Twenty Thirteen with minimal changes to the theme template files. Fixes#23620.
git-svn-id: http://core.svn.wordpress.org/trunk@23820 1a063a9b-81f0-0310-95a4-ce76da25c4cd
