New /features/api

![gocardless api integrate direct debit into your website app gocardless](https://cloud.githubusercontent.com/assets/883598/4592935/2e33dd36-5081-11e4-8c6e-6555e1dbc322.png)

This is also true for https://github.com/gocardless/splash-pages/blob/new-api/app/images/features/api-step-2%402x.png