Add a basic PP homepage to limelight
Initial flat html and css added for Limelight homepage
Adding static transactions explorer image
Git fail - adding scss, css, html files
Getting rid of commented out cruft
Rails fail. Correcting image tag.
Rails-ify the homepage a bit

I didn't add tests for this. That probably makes me a really bad person.
We can revert this commit if you think it's worth just keeping it static
instead.
Bring the homepage SASS in line with our style guide
Don't underline Services when on the homepage
Add a generic realtime stub controller
Add realtime visitors to homepage

I thoroughly admit that I'm basically just being a cowboy now.
Merge branch 'master' into 50805745-spike-update-homepage

Conflicts:
	app/controllers/backdrop_stub_controller.rb
Working realtime on homepage with feature

modularize? handle fallback
governent realtime stub response, use correct path
All Working and tests passing
Remove comments, waiting for nayeema and design input
Controller refactoring and tests
Add homepage CSS to do service groups differently

I know this CSS won't support IE < x for some value of x, and it's
not nice to tie the DOM to the style like this, but I'm considering
this an enhancement that not every browser needs. Let's :shipit:.
Merge pull request #233 from alphagov/50805745-spike-update-homepage

Update homepage