Remove unneeded includes and extends
Merge pull request #54 from alphagov/remove-unneeded-includes

Remove unneeded includes and extends
Add latest changes page for topics.
Merge pull request #55 from alphagov/add-latest-changes-page

Add latest changes page for topics.
Add "latest changes" styling.

Previously there were no styles, and so the page
was unstyled.  Now there are styles, and the page
becomes styled as a result.
Merge pull request #56 from alphagov/add-latest-changes-styling

Add "latest changes" styling.
Use HTML `time` element for updated-at date.
Use Sass mixins/variables for font size and border colour.
Merge pull request #57 from alphagov/more-sass-equals-better-than

More sass equals better than