Set latest news to display only 1 post

The 'latest news' div at the bottom of Listora.com was showing all posts rather than just the most recent.

This commit should set it so that it only shows one post, the latest post.
Remove author from articles on /news

Remove the author name (Matt Soczywko) from the Listora/news page. The
author name will still be present on ther article itself, but it
looked odd having it repeated on this page, as we only have one
contributor to the blog right now.
Add separator to article list

Add a faint dashed line to separate articles more clearly.