Remove hiring message from Last.fm webteam post
Remove need to pass in a null type

* Default it to null within archive template instead
Include 5 latest posts beneath each article

* Latest because they aren’t always recent
* Use example from
https://github.com/hexojs/hexo-theme-landscape/blob/d29cbb83356373af27e7
b98643f29a27804364af/layout/_widget/recent_posts.ejs
* Use some funky limit logic because we need to filter the posts before
limiting. Hexo doesn’t appear to have a sensible way of filtering posts.
Add missing semicolon