Using `display:inline-block;` to lay out article slugs in `home.erb`

Of course it was on the drive home that I realized why `display:inline-block;` didn't work the way we expected when applied to the `.slug` class. Just sat down for a minute and added set the width on the list items we used to tile the article slugs, and also added the inline-block to the divs we're using within the slugs.

Did not attempt to style the slug contents, except to try getting them to lay out in the correct relative positions.

Only change to `home.erb` is commenting out the `</li>` tags, as a kludge to fix the general browser bug rendering inline block content.