upgrade homepage icons to SVG
upgrade integrations page to SVG icons
add vertical and horizontal centering to icons
Fixing conflicts:
Fixing closing tags
Merge pull request #161 from gocardless/svg-icons

Upgrade home page icons to SVG
Merge branch 'new-splash-pages' into svg-icons--integrations
Merge pull request #162 from gocardless/svg-icons--integrations

Upgrade integrations page icons to SVG
Tidying example-checkout code
adding SEPA to subscriptions + rewording footer
Merge branch 'new-splash-pages' into new-sepa-additions
Merge pull request #177 from gocardless/new-sepa-additions

New sepa additions
removed import variables from components
removed import variables for 2 other components I had missed
removed import variables from utils
Fixed the typo across 2 mixin files
Removing most of the icon classes in icon.scss, and the associated image assets. Still need to switch from the image to the SVG on 'PayingWithGoCardless' page.
adding professional services testimonial
adding creative industries testimonial
Switched the white logo image for the SVG on 'paying through gocardless', and then deleted that image and icon.scss