Update footer links to current browse sections

Also update it so the list is in alphabetical order. As with the
homepage the easiest way of doing this is to have two lists floated side
by side.
Merge pull request #471 from alphagov/new-footer-links

Update footer links to current browse sections
Remove smart answers scoped styles from static

Add them to smart answers in order to scope smart answers styles to
make smart answers easier and quicker to update.

https://www.agileplannerapp.com/boards/105200/cards/6024
Put the 'mainstream' footer blue bar on #footer not #wrapper

This is so we can use the new govuk_frontend_toolkit grid
helpers directly on #wrapper, without the 'footer' blue
bar also being constrainted to the grid container width.

By moving the blue bar to #footer, it will always be 100%
width, maintaining the current design.

There is one visual regression, in the current design
the 10px blue bar is applied above the footers 1px grey
bar, but in the new version the blue bar replaces it
entirely.

I debated doing some selector gymnastics to keep the 1px
bar as well, but after a discuss with Mark H. we agreed
that is was barely percievable and fine to be replaced.
Merge pull request #473 from alphagov/move-footer-blue-bar

Put the 'mainstream' footer blue bar on #footer not #wrapper
Apply footer border to _top_, not bottom

This was meant to migrate the wide blue bar from #wrapper to
footer, but that should be on the top
Merge pull request #474 from alphagov/fix-footer-border

Apply footer border to _top_, not bottom
Updating footer link for /browse/housing

The browse category has been renamed to /browse/housing-local-services.
Merge pull request #475 from alphagov/update_housing-link-in-footer

Updating link for /browse/housing in the footer
Merge pull request #472 from alphagov/remove-smartanswers-scoped-css

Remove smart answers scoped styles from static