Update blog list template

Having `front-page.php`, `home.php` and `index.php` templates started to seem like overkill. This PR suggests that we remove `home.php` and use `index.php` instead.
@germanny I get that, but I'm thinking of @ericrasch's scenario where the admin bar isn't showing and you're unfamiliar with a project. With an edit button you can go right to the page in the admin without having to figure out where it's coming from.