Show recommended links in with normal results

Now that our search algorithm is much improved, we think we can rely on natural
ranking to present the external/recommended links appropriately. We also think
that integrating them with the other results will mean a better UX.

Presentation to be reviewed with @amosie.
Change styling of external links

Change courtesy of @amywhitney
update css
Don't display the URL scheme for external results.

As suggested by @amywhitney, the scheme isn't useful to most users.
Merge pull request #415 from alphagov/show_recommended_links_inline

Show recommended links inline