Add rss format to travel advice country
Strip redundant elements from rss view
Basic integration test for country rss feed
Remove pubDate element from rss item
Replace ERB template with builder template
Expand acronyms on API FAQ page.

Zendesk ticket #57286
Correct link element format and summary
Strip html tags from the country summary
Remove redundant namespace attribute, add encoding attribute
Switch from RSS to Atom
Correct feed links
Merge pull request #218 from alphagov/fix_api_acronym

Expand acronyms on API FAQ page.
Simplify atom feed builder
Added info box styling in homepage.scss.
Merge pull request #220 from alphagov/promo-scss

Added info box styling in homepage.scss.
Don't rely on request scheme and host
Use web_url from content_api in atom feed
Set 'Want to contact us directly?' heading to h2

Visually the heading for this call out doesn't look right as h1.
Merge pull request #222 from bmwelby/patch-1

Set 'Want to contact us directly?' heading to h2
Split atom feed tests into separate file