removed site-cutter class from all the new splash pages. Updated side margins/padding in responsive 'paying through gocardless' page
removed u-center and site-gutter where it appears with site-container.
fixing a width issue on prof services
Removing hero-heading
Merge pull request #171 from gocardless/remove-hero-heading

Removing hero-heading component
Removing unnecessary classes previously used alongside page-hero
Correcting /legal/customers heading spacing
Merge pull request #172 from gocardless/fixing-page-hero-display-table

Removing unnecessary classes previously used alongside page-hero
Fixing centering on nav for basic & example-checkout
Fixing
Merge pull request #166 from gocardless/removing-site-gutter

Removed site-gutter class from all new splash pages - DO NOT MERGE
Fixing conflicts