Update govuk_template and footer links

The goal of this was to update the footer links. However, the footer
styling had been updated in govuk_template so trying to copy the styles
from static for the new links caused layout problems. So I have also
updated govuk_template to the latest version. There were a couple of
small style changes and new apple touch icons that came with the update.
Fix template js path
Match https://github.com/alphagov/static/pull/471
Match scss from https://github.com/alphagov/static/pull/471
Adding top border to footer
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Merge pull request #65 from alphagov/update-footer-template

Update govuk_template and footer links