adds phone number to contact sales lead capture form
internationaling the phone number
Merge pull request #346 from gocardless/add-phone-to-contact-sales

adds phone number to contact sales lead capture form
Adding CSS for nav dropdown arrow
Merge pull request #351 from gocardless/adding-nav-css-for-ab-test

Adding CSS for nav dropdown arrow A/B test
Merge branch 'dev'