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
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
Fix hash scroll for tabby, remove deprecated js
Merge new-splash-pages
Fixup
Removing sanitizePath()
adding char's new property copy
Fixing specs
Merge pull request #203 from gocardless/fix-tabby-scroll

Fix hash scroll for tabby, remove deprecated js
Removing pages & adding redirects