Added a humans.txt file

This is just an initial version, people can add themselves via pull request.

See http://humanstxt.org/
Add Patrick to humans.txt
Add Paul

Also added spaces were missing. Excuse my OCD!
Add Stephan
Whitespace & UK
Adding @alastairjardine
Typo
Updated title for myself
added Michael McNamara
Merge branch 'master' of github.com:guardian/frontend into humans
Merge branch 'humans' of github.com:guardian/frontend into humans
Merge pull request #2759 from guardian/humans

Added a humans.txt file