Bump govuk_template to latest version

The new version contains:

- Cookie bar above header
- The blue brand bar on every page by default
- New widths on the footer

Updated the footer padding to compensate for the new footer width and
removed the border on the breadcrumbs to no end up with a double colour
bar at the top of the page.
Merge pull request #404 from alphagov/bump-template

Bump govuk_template to latest version