Make it easy to switch off the "classic version" link.

Might as well turn off the link on video while I am in there
Merge branch 'master' of github.com:guardian/frontend into classic
Always show the sign in button
New control icon structure
Fix position of header drop down menus
Load username as soon as possible
Fix top bar item spacing
Include internal content code in pressed.json
Merge branch 'master' of github.com:guardian/frontend into speed-up-username-display
only run playlist on audio
Merge pull request #5260 from guardian/playlist-only-on-audio

Only init playlist on audio
Merge pull request #5257 from guardian/facia-press-content-code

Add internalContentCode to pressed.json & json.lite
Prevent double username insertion
Remove blocking script from header
Add a footer JavaScript partial
Instantly show username from cookie
Merge pull request #5240 from guardian/classic

Make it easy to switch off the "classic version" link.
Updated readme with a quick instructions

on how to write tests
Merge pull request #5249 from guardian/speed-up-username-display

Speed up username display in header
Fix linting warning