reduce margin-top of h1.main
Add link to org homepage from about page
Fix broken available languages for orgs about page

• Remove superfluous links below grest/logo
• move next to new 'back to homepage' link
• style for wales office only
Merge pull request #728 from alphagov/back-to-orgpage-from-org-aboutpage

Back to orgpage from org aboutpage

https://www.pivotaltracker.com/story/show/47632049