Merge remote-tracking branch 'origin/master' into responsive-nav
RIP $gutter
Optimise D2 pick icon in data-uri

I decoded the base64 and exported it into a png file, then I ran ImageOptim on it and re-encoded it to base64.

Before: 3774 bytes
After: 564 bytes

Gains: 85.1%
Optimise Android release message pattern
Optimise off target goals background
Add quotes around url
Improve Exception Reporting
Fix Sponsor Not Showing in Diagnostics Page
Merge remote-tracking branch 'origin/master' into responsive-nav
remove ab test
add navigation tracking attributes
Merge pull request #4919 from guardian/turn-off-mpu-ab

Remove mobile MPU a/b test
Merge pull request #4917 from guardian/kc-fix-sponsors

Fix Getting Sponsors
Merge pull request #4909 from guardian/remove-gutter-fixes-4864

RIP $gutter
Merge pull request #4911 from guardian/d2-icon-optimise

Optimise data-uri PNGs
Merge pull request #4922 from guardian/responsive-nav

Tracking attributes for new navigation
Merge pull request #4927 from guardian/master

Get Ruby Branch up to date