Add FA link in the Header Social section

[Info 3bits]

When you enter the social icons name you need a reference to enter the right name.

A link to http://fortawesome.github.io/Font-Awesome/icons/#brand would be good

[Jeremy Hopkins]

I would rather add the all icons list as I know some people use this for links other than social (including ourselves)

http://fortawesome.github.io/Font-Awesome/icons/

[Jeremy Hopkins]

Fixed by 83c1372