Add Simply Measured

Contributor: Daniel Worthington, Director of UX, @halffullheart
Source: internal contact database

I counted our engineers and devops team, but no one who writes code on our product team (analysts, UX) nor did I count QA, PMs or our VP of Engineering. This seemed to fit the spirit of the README best.
Merge pull request #103 from halffullheart/patch-1

Add Simply Measured