Changing dev support ad

Tweaks & renaming developer support ad
Merge pull request #119 from gocardless/change-job-ads

Changing dev support ad
Tweaks to engineering job ads
Removing leavers from about page

Andrew, Dominik & Astrid
Merge pull request #121 from gocardless/removing-leavers

Removing leavers from about page
Fix typo
Merge pull request #120 from gocardless/change-job-ads

Tweaks to engineering job ads
changing Pro amount from 500 to 1000 transactions per month
Adding SVG icons to /payments-by-direct-debit
adding team members' names to about page
Merge pull request #200 from gocardless/new-team-members

adding team members' names to about page
Merge pull request #199 from gocardless/new-pro-amount

Changing Pro amount from 500 to 1000 transactions per month
Adding svg site-logo & fixing /paying-through-gocardless
Merge branch 'new-splash-pages' of github.com:gocardless/splash-pages into new-splash-pages
Merge dev
Fix job
adding section-scroll-target & implementing on all pages that use scrollspy
Merge pull request #201 from gocardless/fixing-scrollspy

Removing scrollspy offset & smooth-scroll
Fixing ng-gc-smooth-scroll on about
Fixing merge conflict