Rework flow of people we opt in to the alpha
jshint
Allow users to 'hide this message'
Replace custom breakpoint code with common function
Replace custom breakpoint code with common function
Neater show/hide functions
'hide this message' now has a data-link-name
Add new alpha message copy
Fix merge conflicts
Add site message styling
merge bacon
Abstracted DesktopLink so we can reuse it
Merge pull request #1857 from guardian/release-message

Release message styling