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
renamed the vertical-page__hockey-bg (etc) to story-hero__spencer-hockey (etc)
tidied up the flow of text on gyms and sports clubs pages, so that it flows more nicely across lines of text on the story hero
Fixed site wrappers across 6 pages
fixed site wrapper, and removed unused ng-init div for videos
fixing indentation
Fixed site wrapper on legal pages, and some indentation flaws I had introduced
6 more pages - site wrapper fixed
Removed unnecessary <hr/>s from above the story-heros
Changing /integrations -> /partners url
Correcting redirect
Merge pull request #198 from gocardless/change-integrations-url

Change /integrations URL to /partners
Tweaking copy flow
Merge pull request #196 from gocardless/check-site-wrappers

Checked site wrapper class exists on all pages, and spans entire page