_s: Move away from using <article> for content that is not syndicated.
_s: Let's not change .entry-date.
_s: Let's keep the `.entry-` namespace for page post types.
_s: Let's keep the `.entry-` namespace for attachment post types.
_s: Move away from using `<article>` for content that is not a post,
page, or attachment.
Merge branch 'obenland-page'
_s: Add `.page-content` class to `style.css` to encourage styling. Also
removes some redundant comments.